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453b0e0cd972787f62dd22c0d3fee9dbe212bdf5
harbour-core/harbour/source/rdd/workarea.c
Przemyslaw Czerpak 64f97582d9 2008-09-13 18:49 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl) 
* harbour/include/hbpp.h
  * harbour/include/hbvm.h
  * harbour/include/hbcomp.h
  * harbour/include/hbcompdf.h
  * harbour/include/hbtrace.h
  * harbour/include/hbapilng.h
  * harbour/include/hbinit.h
  * harbour/source/rtl/langapi.c
  * harbour/source/pp/ppcore.c
  * harbour/source/pp/hbpp.c
  * harbour/source/vm/itemapi.c
  * harbour/source/vm/hvm.c
  * harbour/source/common/hbver.c
  * harbour/source/common/hbtrace.c
  * harbour/source/common/expropt2.c
  * harbour/source/compiler/complex.c
  * harbour/source/compiler/hbident.c
  * harbour/source/compiler/hbfunchk.c
    * changed some declarations from 'char *' to 'const char *' and
      fixed casting for some more pedantic compilers

  * harbour/source/pp/ppcore.c
    ! fixed one typo which could cause memory leak and even GPF

  * harbour/common.mak
  * harbour/source/vm/Makefile
  * harbour/source/rtl/Makefile
  - harbour/source/rtl/set.c
  + harbour/source/vm/set.c
  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
    * moved from RTL to HVM
    * eliminated hb_set global structure
    * moved set structure to HVM stack
    + added internal function hb_setClone() which is used to create
      copy of SET structure for child threads
    * hidden HB_SET_STRUCT declaration - 3-rd part code must not access it
      directly. Dedicated hb_set*() functions should be used instead.
    + added new function:
         BOOL hb_setSetItem( HB_set_enum set_specifier, PHB_ITEM pItem )
      which allow to change some set by 3-rd party code.
      TODO: not all SETs can be changed yet - if someone have a while
            then please add code for missing ones.

  * harbour/include/set.ch
  * harbour/include/hbset.h
    + added _SET_CODEPAGE which works like _SET_LANGUAGE giving common
      interface

  * harbour/include/hbsetup.h
    + added HB_CODEPAGE_DEFAULT which works like HB_LANG_DEFAULT

  * harbour/source/vm/hvm.c
    ! fixed builds which uses non EN lang or code page modules
      by forcing linking the chosen ones

  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
  * harbour/include/hbapicdp.h
  * harbour/source/rtl/cdpapi.c
    - removed global code page variable: hb_cdp_page and moved
      code page settings to HVM stack
    + added new function hb_cdpID() which returns current code page
      character ID
    + added new functions hb_vmCDP() and hb_vmSetCDP() to get/set
      active for given thread code page structure

  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
  * harbour/include/hbapilng.h
  * harbour/source/rtl/langapi.c
    + moved lang setting to HVM stack
    + added new functions hb_vmLang() and hb_vmSetLang() to get/set
      active for given thread language module

  * harbour/include/hbvmpub.h
  * harbour/include/hbstack.h
  * harbour/include/hbapi.h
  * harbour/source/vm/estack.c
  * harbour/source/vm/dynsym.c
  * harbour/source/vm/itemapi.c
  * harbour/source/vm/memvars.c
    * changed memvar handles for HB_HANDLE to void * which is directly
      casted to PHB_ITEM - new memvar references
    * changed HB_DYNS declarations for MT mode. In MT mode HB_DYNS does
      not contain area and memvar handles which are moved to thread
      local HVM stack
    + added array for thread local memvar and area handles to HVM stack
    % eliminated global continues array with all memvars and detached locals
    % changed HB_IT_MEMVAR to use pointers to HB_ITEM directly - it resolve
      synchronization problems in MT mode and should also improve the speed
      and reduce memory usage. It should be well visible in applications which
      uses lot of detached locals.
    - removed hb_memvarsInit() and hb_memvarsFree() - they are not necessary
      now because we do not longer use array with all allocated memvars
      and detached local and private stack initialization is made
      automatically
    + added internal functions hb_dynsymGetMemvar()/hb_dynsymSetMemvar()
    + added hb_memvarGetValueBySym() for debugger
    * moved PRIVATE variable stack to HVM stack
    * eliminated all static variables in memvars module

  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
  * harbour/source/rtl/fserror.c
    * moved IO errors to HVM stack
    + added special IO error handling which works without HVM stack
      It allows to use hb_fs*() functions without allocated stack
      by 3-rd party threads.

  * harbour/source/rtl/filesys.c
    * moved hb_fsCurDir() to HVM stack with special handling to work
      with HVM stack like IO errors

  * harbour/source/rdd/workarea.c
    * allocated RDD node array in bigger peaces to reduce later RT
      reallocations in MT mode. If user want to add dynamically more
      then 64 RDDs then it should synchronize this operation himself.

  * harbour/source/rdd/wacore.c
    * moved WA list, current WA, default RDD and neteer() flag to HVM stack

  * harbour/include/hbdefs.h
    - removed HB_HANDLE declaration

  * harbour/include/hbapi.h
    - removed HB_VALUE structure - it's not longer used due to different
      memvar handling
    * updated hb_struMemvar to new memvar handling
    * replaced hb_vmIsLocalRef() and hb_memvarsIsMemvarRef() with
      hb_vmIsStackRef() which respect multiple stack and new memvar
      and static structures and location in GC mark pass.

  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
  * harbour/source/vm/hvm.c
    + added support for thread specific data located on HVM stack
      Now it's possible to allocate static variables which are
      local to thread. Such variables are allocated on HVM stack
      and automatically destroyed. To declare new TSD variable use:
         HB_TSD_NEW( <name>, <size>, <init>, <destruct> )
      <name> - name of variable which holds TSD handler
      <size> - size of TSD are which has to be allocated
      <init> - init function, executed when new TSD is allocated by thread
               (thread access given TSD 1-st time). This function receives
               void * pointer to allocated area.
      <destruct> - destructor function executed when HVM stack is destroyed
      f.e.:
         static HB_TSD_NEW( s_scrData, sizeof( HB_SCRDATA ),
                            NULL, hb_xSaveRestRelease );
      To initialize dynamically allocated TSD variable use:
         HB_TSD_INIT( <name>, <size>, <init>, <destruct> )
      Pointer to TSD can be accessed using hb_stackGetTSD( &<name> )
      where <name> is name of variable which holds TSD handler, f.e.:
         PHB_SCRDATA pScrData = ( PHB_SCRDATA ) hb_stackGetTSD( &s_scrData );
      See source/rtl/xsavescr.c as an example
      It's also possible to test if data has been already allocated for
      current thread by:
         hb_stackTestTSD( &<name> ) => pData
      it works like hb_stackGetTSD() but return NULL if current thread data
      has not been allocated yet.

  * harbour/include/hbstack.h
  * harbour/source/vm/estack.c
    * changed hb_stack location to thread local storage in MT mode
    + added functions and macros to access/assign new HVM stack members
    + changed garbage collection mark functions to work with multiple
      stacks, thread local static and memvar variables

  * harbour/source/rtl/xsavescr.c
    * use TSD data for screen buffer to make __XSAVESCREEN()/__XRESTSCREEN()
      thread independent

  * harbour/source/rtl/idle.c
    * use TSD data for idle task settings and codeblocks
    - removed hb_idleShutDown() - it's not longer necessary

  * harbour/source/rtl/setkey.c
    * use TSD data for allocated keys to make SETKEY() thread independent

  * harbour/source/rtl/math.c
    * moved math error handler, math error block, math error mode and
      math error structure to TSD

  * harbour/source/rtl/errorapi.c
    * moved error handler, error block, error launch counter and DOS error
      value to TSD

  * harbour/source/rtl/inkey.c
    * moved inkey "before" and "after" blocks to TSD

  * harbour/source/rdd/hsx/hsx.c
    * moved HSX handles array to TSD

  * harbour/include/hbapigt.h
  * harbour/source/rtl/console.c
    - removed hb_setkeyInit() and hb_setkeyExit() - they are not longer
      necessary, allocated resources will be freed by TSD destructor
      function

  * harbour/include/hbapi.h
  * harbour/source/rtl/console.c
    * removed hb_conXSaveRestRelease() - it's not longer necessary,
      allocated resources will be freed by TSD destructor function

  * harbour/source/vm/macro.c
    * moved s_macroFlags to TSD

  * harbour/source/rtl/accept.c
    * moved accept buffer to TSD

  * harbour/include/hbcomp.h
  * harbour/include/hbcompdf.h
  * harbour/include/hbxvm.h
  * harbour/source/compiler/hbmain.c
  * harbour/source/compiler/hbfix.c
  * harbour/source/compiler/hbpcode.c
  * harbour/source/compiler/hbdead.c
  * harbour/source/compiler/complex.c
  * harbour/source/compiler/genc.c
  * harbour/source/compiler/gencc.c
  * harbour/source/compiler/hbopt.c
  * harbour/source/compiler/hblbl.c
  * harbour/source/compiler/hbstripl.c
  * harbour/source/compiler/harbour.y
  * harbour/source/compiler/harbour.yyc
  * harbour/source/compiler/harbour.yyh
  * harbour/source/vm/hvm.c
    + added new PCODE HB_P_THREADSTATICS
    + added support for static variables which are local to thread:
         THREAD STATIC <varname [:= <exp>], ...>
      They work like normal static variables but each thread operates
      on its own copy.
    * added protection against possible double call to hb_xfree()
      It can happen due to wrong marking expressions as used by bison
      and executing destructors after our free code when syntax error
      appear.

  * harbour/source/rtl/perfuncs.prg
  * harbour/source/rtl/menuto.prg
  * harbour/source/rtl/getlist.prg
  * harbour/source/rtl/readvar.prg
  * harbour/source/rtl/text.prg
    * use THREAD STATIC variables to make above code MT safe

  * harbour/include/hbgtcore.h
  * harbour/source/rtl/hbgtcore.c
    + added hb_gt_BaseFree() which will release current GT pointer
      locked by hb_gt_Base() function. This function will be used
      to optional automatic GT access synchronization when threads
      share the same GT.

  * harbour/source/rtl/gtapi.c
  * harbour/source/rtl/inkeyapi.c
  * harbour/source/rtl/mouseapi.c
  * harbour/contrib/hbct/ctwin.c
    * free GT pointer by hb_gt_BaseFree()
      TODO: CTWIN is not MT safe yet - it will be updated together
            with core GT when we add multi window interface for
            thread with own console window.

  * harbour/bin/hb-func.sh
  * harbour/config/linux/gcc.cf
    + added rt lib to Linux builds

  * harbour/bin/postinst.sh
    * create MT safe version of FM stat library: fmmt

  * harbour/bin/pack_src.sh
    + added support for ZIP packing

  * harbour/include/hbapi.h
  * harbour/include/hbvm.h
  * harbour/source/vm/hvm.c
    + added hb_vmThreadInit()/hb_vmThreadQuit() functions - they initialize
      HVM for calling thread so it can execute .prg code and call HVM
      functions. They can be used by 3-rd party code threads.
    + added hb_vmUnlock()/hb_vmLock() functions which informs that
      thread will not operate on HVM structures for some time allowing
      to execute single thread only processes like GC.
    + added hb_vmThreadQuitRequest() which sends stop request to given
       thread
    + added hb_vmWaitForThreads() which stops main thread execution waiting
      for other threads
    + added hb_vmSuspendThreads() and hb_vmResumeThreads() used be GC
      to stop all HVM threads before mark/swap scan
    + added linked list of HVM stacks
    + added hb_vmTerminateThreads() used by main HVM thread in QUIT state
    * moved EXIT procedures execution from QUIT request to HVM QUIT state
      in MT mode. It may effects some non structural code which tries to
      access private variables in EXIT functions but it's much cleaner
      and understandable for user. Please remember that we guaranties
      that ALWAYS code in BEGIN SEQUENCE is _always_ executed even after
      HVM QUIT request just like destructs. Personally I think that we
      should move EXIT procedures execution also in ST mode.
    * changed startup and cleanup code for new internal structures
    * changes startup and cleanup code for MT mode
    % removed some redundant HB_ITEM type settings
    ! eliminated non MT safe code which was using reference counters
      without protection

  * harbour/common.mak
  * harbour/source/vm/Makefile
  + harbour/include/hbthread.h
  + harbour/source/vm/thread.c
    + added C level functions to manage threads and synchronization objects
      See hbthread.h for detail description. They are based on PTHREAD API
      and PTHREAD documentation can be used as reference. I intentionally
      keep this list small for easier multiplatform porting.
      Now they have been implemented for PTHREADS (POSIX threads supported by
      many different OSes), MS-Win32/64 and OS2. The OS2 version is not tested
      at all. I do not even know if it can be compiled so please make tests.
      I used Internet resources and some part of xHarbour code as documentation
      for OS2 MT API. It should be quite easy to add other platforms if necessary.
      Harbour core code needs non recursive mutexes, conditional variables and
      TLS for one pointer. If platforms does not support conditional variables
      (f.e. MS-Win or OS2) then they can be emulated using multistate semaphores.
    + added .prg functions to manage threads and synchronization objects:
         hb_threadStart( <@sStart()> | <bStart> [, <params,...> ] ) -> <pThID>
         hb_threadJoin( <pThID> [, @<xRetCode> ] ) -> <lOK>
         hb_threadDetach( <pThID> ) -> <lOK>
         hb_threadQuitRequest( <pThID> ) -> <lOK>
         hb_threadWaitForAll() -> NIL
         hb_mutexCreate() -> <pMtx>
         hb_mutexLock( <pMtx> [, <nTimeOut> ] ) -> <lLocked>
         hb_mutexUnlock( <pMtx> ) -> <lOK>
         hb_mutexNotify( <pMtx> [, <xVal>] ) -> NIL
         hb_mutexNotifyAll( <pMtx> [, <xVal>] ) -> NIL
         hb_mutexSubscribe( <pMtx>, [ <nTimeOut> ] [, @<xSubscribed> ] ) -> <lSubscribed>
         hb_mutexSubscribeNow( <pMtx>, [ <nTimeOut> ] [, @<xSubscribed> ] ) -> <lSubscribed>
      The function list should give similar to xHarbour API but they are not exactly
      the same and except of hb_mutex*() functions which should replicate xHarbour behavior.

  + harbour/source/vm/vmmt
  + harbour/source/vm/vmmt/Makefile
    + added hbvmmt library to GNU make builds.
      Non GNU make builds should be updated.

  * harbour/contrib/hbct/pos1.c
  * harbour/contrib/gtwvg/gtwvg.c
  * harbour/contrib/rddads/ads1.c
  * harbour/contrib/hbmisc/spd.c
  * harbour/contrib/hbbmcdx/bmdbfcdx.c
  * harbour/contrib/examples/rdddbt/dbfdbt1.c
  * harbour/source/vm/runner.c
  * harbour/source/vm/itemapi.c
  * harbour/source/vm/hvm.c
  * harbour/source/rtl/console.c
  * harbour/source/rtl/strcase.c
  * harbour/source/rtl/spfiles.c
  * harbour/source/rtl/defpath.c
  * harbour/source/rtl/hbgtcore.c
  * harbour/source/rtl/dateshb.c
  * harbour/source/rtl/mlcfunc.c
  * harbour/source/rtl/fstemp.c
  * harbour/source/rtl/is.c
  * harbour/source/rtl/setcolor.c
  * harbour/source/rtl/errorint.c
  * harbour/source/rtl/transfrm.c
  * harbour/source/rtl/dates.c
  * harbour/source/rtl/filesys.c
  * harbour/source/rtl/gtdos/gtdos.c
  * harbour/source/rtl/gtwin/gtwin.c
  * harbour/source/rtl/gtwvt/gtwvt.c
  * harbour/source/rtl/gtxwc/gtxwc.c
  * harbour/source/rtl/gttrm/gttrm.c
  * harbour/source/rtl/gtpca/gtpca.c
  * harbour/source/rtl/gtcgi/gtcgi.c
  * harbour/source/rtl/gtcrs/gtcrs.c
  * harbour/source/rtl/gtstd/gtstd.c
  * harbour/source/rtl/gtsln/gtsln.c
  * harbour/source/rtl/gtsln/gtsln.h
  * harbour/source/rdd/dbf1.c
  * harbour/source/rdd/sdf1.c
  * harbour/source/rdd/delim1.c
  * harbour/source/rdd/dbcmd.c
  * harbour/source/rdd/hbdbsort.c
  * harbour/source/rdd/workarea.c
  * harbour/source/rdd/dbffpt/dbffpt1.c
  * harbour/source/rdd/dbfcdx/dbfcdx1.c
  * harbour/source/rdd/dbfntx/dbfntx1.c
  * harbour/source/rdd/hsx/hsx.c
  * harbour/source/rdd/hbsix/sxfname.c
    * use API functions instead of direct accessing to hb_cdp_page or hb_set

  * harbour/source/rtl/fstemp.c
  * harbour/source/rtl/fssize.c
  * harbour/source/rtl/hbffind.c
  * harbour/source/rtl/filesys.c
    * encapsulate potentially slow IO operation inside
      hb_vmUnlock()/hb_vmLock() calls to allow other thread GC
      activation

  * harbour/contrib/hbnf/fttext.c
    ! fixed casting

  * harbour/contrib/gtwvg/gtwvg.h
    - removed #include <comctl32.h> - my MinGW and MinGW/CE instalations do
      not have them. If it exists in some newer ones then it has to be
      covered by #if version checking.

  * harbour/source/vm/dynsym.c
    - removed hb_dynsymLog() and hb_dynsymMemvarHandle()
    * modified code to be MT safe and improved speed of some operations
    * added MUEXT protection for global dynamic table access

  * harbour/include/hbapi.h
  * harbour/source/vm/garbage.c
    * changed to work with MT HVM
    * changed to work with new memvar structures and thread local static and
      memvar variables
    * added MUEXT protection for linked block lists
    + added parameter to hb_gcCollectAll() which will force GC activation
      in MT mode by temporary suspending all executed threads.
    + added logical parameter to HB_GCALL() functions which is passed to
      hb_gcCollectAll()

  * harbour/source/vm/fm.c
    * added MUEXT protection for FM statistic module
    * added MT protection for reference counters. For platforms
      which supports atomic incrmenetation/decrementation (f.e.
      Interlocked*() functions in MS-Win) such operations are
      used. For other it's MUTEX protection. It gives MT safe
      readonly access for HVM complex variables without user
      synchronization. The MUTEX protection can cause some speed
      overhead so it's good to define MT safe version of
      HB_ATOM_INC()/HB_ATOM_DEC() in hbthread.h if given platform
      has them. Now they are defined only for Windows. For other
      platforms We can define can define them in assembler for some
      most popular CPUs in the future.

  * harbour/source/vm/classes.c
    * changed class definition array. Now it keeps pointers to class
      structures.
    * In MT mode allocated at HVM startup big enough array for class
      definitions to avoid later RT reallocations. It effectively eliminates
      MUTEX synchronization for class structure access.
    * protect by MUTEX code for new class creation

  * harbour/source/debug/dbgentry.c
    * eliminated hbvmopt.h and direct accessing to HVM structures

  * harbour/source/rtl/gtclip.c
    * protect with MUTEX access to internal clipboard data

  * harbour/source/rdd/nulsys/nulsys.c
    + added hb_rddCloseAll()

  + harbour/tests/mt
  + harbour/tests/mt/mttest01.prg
  + harbour/tests/mt/mttest02.prg
  + harbour/tests/mt/mttest03.prg
  + harbour/tests/mt/mttest04.prg
  + harbour/tests/mt/mttest05.prg
  + harbour/tests/mt/mttest06.prg
  + harbour/tests/mt/mttest07.prg
    + added some demonstration/test small MT programs written
      using Harbour language. Some of them can be also compiled
      by xHarbour but xHarbour does not pass any of my tests in
      real multi-CPU machine so do not expect they will work
      correctly.

   Harbour threads needs OS threads support. Each Harbour thread is directly
   mapped to OS thread. It's not very efficient on some older system where
   cost of thread creation and/or task switching is very expensive but it
   should not be bigger problem for modern OS-es which can support threads
   in practice nearly in user space only.
   I haven't touched Harbour function calling convention which comes from
   Clipper. It means that we do not pass pointer to VM to each functions
   like CLIP or xBase++. To resolve the problem I have to use thread local
   storage (TLS) where such pointer is kept. If platform does not support
   TLS then it can be emulated by us. Anyhow the speed of accessing TLS
   data and extracting HB_STACK poitner is critical for performance.
   Some compilers depending on used hardware and OS give native support
   for TLS (f.e. __thread keyword in GCC/BCC or __declspec( thread ) in MSVC).
   This should give optimal performance. On other Harbour uses TLS functions
   like TlsGetValue() (MS-WIN) or pthread_getspecific() (PTHREAD) are used.
   OS2 gives quite interesting TLS functionality which seems to be quite fast
   though it will be interesting to know how it is iplemented internally for
   real multi CPU machines (if it depends on CPU exception then the
   performance will be bad). We need TLS only for one pointer to HB_STACK
   structure.
   I haven't added any tricks like HB_THREAD_STUB in xHarbour to reduce
   the cost of TLS access. If it will be necessary for some platform the we
   can add it.
   Except TLS Harbour threads needs OS support for non recursive mutexes or
   critical sections and conditional variables. If platforms does not support
   conditional variables (f.e. MS-Win or OS2) then they can be emulated using
   multistate semaphores. I intentionally didn't create code which may need
   recursive mutexes. The non recursive ones are often faster and some
   platforms may not support recursive mutexes so they will have to be
   emulated by us.
   Harbour uses reference counters for complex variables. It means that even
   readonly access to complex item causes internal write operations necessary
   to increment/decrement its reference counter. To make such readonly access
   MT safe we have to make incrementation and decrementation with result
   checking atomic. By default it's done by mutex inside vm/fm.c but some
   platforms have native support for atomic inc/dec operations, f.e. 
   Interlocked*() functions in MS-Win. If they are available then such
   functions should be used to not reduce the performance by mutex call
   very often used functions. For many CPUs it should be quite easy to
   implement such atomic inc/dec functionality in assembler. F.e. for
   GCC and x86@32 it may looks like:

      static __inline__ void hb_atomic_inc32( volatile int * p )
      {
         __asm__ __volatile__(
            "lock incl %0"
            :"=m" (*p) :"m" (*p)
         );
      }

      static __inline__ int hb_atomic_dec32( volatile int * p )
      {
         unsigned char c;
         __asm__ __volatile__(
            "lock decl %0"
            "sete %1"
            :"=m" (*p), "=qm" (c) :"m" (*p) : "memory"
         );
         return c == 0;
      }

   and then it's enough to define in hbthreads.h:
      #define HB_ATOM_INC( p )    hb_atomic_inc32( ( volatile int * ) p )
      #define HB_ATOM_DEC( p )    hb_atomic_dec32( ( volatile int * ) p )

   Probably I'll make it for some most popular CPUs in the future.
   In Harbour each thread which wants to call HVM functions have to allocate
   it's own HVM stack. It's done hb_vmThreadInit(). The HVM stack is freed
   by calling hb_vmThreadQuit(). This functions can be called also by 3-rd
   party threads if they want to call HVM functions or execute .prg code.
   Calling HVM functions without allocated stack will cause GPF.
   I moved most of static variables to HVM stack to make them thread
   local. But some of them like FS errors have their own alternative
   copy which is used when thread does not allocate HVM stack. It allows
   to use hb_fs*() functions without HVM stack but programmer have to
   know that error codes return by hb_fs*Error() functions can be
   overwritten by other threads which also didn't allocated HVM stack.
   To execute garbage collector scan and mark pass it's necessary to
   stop other HVM threads. Otherwise the scan may give false results.
   It's also possible to not stop threads but protect with mutex all
   operations on GC items but it will probably cause performance reduction
   and will force some other modifications. Maybe I'll implement it
   in the future.
   I didn't use any OS level thread KILL or CANCEL calls. All HVM threads
   have to be cleanly removed without any resource leaks.
   QUIT command terminate only calling thread. If main (startup) HVM
   thread call QUIT then it sends QUIT request to all existing threads.
   In QUIT state ALWAYS statements and destructors are executed.
   New thread is created by:
      hb_threadStart( <@sStart()> | <bStart> [, <params,...> ] ) -> <pThID>
   The returned value is a pointer to internal thread structure which
   can be used in JOIN or DETACH operations. Each thread should be Joined
   or DETACHED to avoid resource leaks. If programmer does not store
   <pThID> or all instances of <pThID> are destroyed then thread is
   automatically detached. I do not know clear method of thread detaching
   in OS2. If some OS2 users knows it then plase update vm/hbthread.c.
   When thread terminates then all locked by this thread mutexes are
   released.
   Each thread uses its own memvars (PRIVATEs and PUBLICs) and work areas.
   When new thread is created then it inherits from parent thread:
      - code page
      - language
      - SETs
      - default RDD
   error block is initialized to default value by calling ERRORSYS()
   and PUBLIC variable GetList := {} is created.
   The following objects are initialized to default value:
         - error block
         - math error handler and math error block
         - macro compiler features setting (hb_setMacro())
           or move them to SETs.
   We can think about inheriting them. It's also possible to add
   inheriting of all visible memvars but I do not know it's good
   idea.

   Compilation and linking:
   For MT mode HVM library should be compiled with HB_MT_VM macro.
   GNU make automatically creates hbvmmt library which should be
   linked with Harbour MT programs instead of hbvm.
   Non GNU make files should be updated.
   If given compiler support TLS then you can try to set HB_USE_TLS
   to force using native compiler TLS support. Now it's enabled by
   default only for BCC. For Linux and GCC builds it may depend also
   on used GLIBC version. In older system there is no TLS support
   at all or TLS works only for shared binaries so I haven't enabled
   it. If you will test some other compiler then please add default
   native TLS support for them in hbthread.h
   Users using hb* scripts can simply use -mt switch when they want
   to create MT program, f.e.:
      hbmk -n -w3 -es2 -mt mttest01.prg

   There are still some minor things which should be done but I'll
   do them later. Current state seems to be fully functional.
   The most important and still missing is our own file lock server
   for RDD synchronization in POSIX systems. Kernel internally
   recognize POSIX locks by PID and file i-node - not PID and file
   handle. It means that the same file open more then once by one
   process shares locks. Because POSIX locks can be overwritten
   then we do not have any synchronization between aliased workareas
   or threads using the same table in *nixes. We have to make
   synchronization ourselves. I'll create such lock server ASAP.

   Please test and enjoy using Harbour threads.
2008-09-13 16:53:45 +00:00

2278 lines
63 KiB
C
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/*
* $Id$
*/
/*
* Harbour Project source code:
* Default RDD module
*
* Copyright 1999 Bruno Cantero <bruno@issnet.net>
* Copyright 2004-2007 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
* www - http://www.harbour-project.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*
* The following functions are added by
* Horacio Roldan <harbour_ar@yahoo.com.ar>
* hb_waCloseAux()
*
*/
#include <ctype.h>
#include "hbapi.h"
#include "hbapirdd.h"
#include "hbapiitm.h"
#include "hbapierr.h"
#include "hbapilng.h"
#include "hbvm.h"
#include "hbset.h"
/*
* -- BASIC RDD METHODS --
*/
/*
* Determine logical beginning of file.
*/
static ERRCODE hb_waBof( AREAP pArea, BOOL * pBof )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waBof(%p, %p)", pArea, pBof));
* pBof = pArea->fBof;
return SUCCESS;
}
/*
* Determine logical end of file.
*/
static ERRCODE hb_waEof( AREAP pArea, BOOL * pEof )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waEof(%p, %p)", pArea, pEof));
* pEof = pArea->fEof;
return SUCCESS;
}
/*
* Determine outcome of the last search operation.
*/
static ERRCODE hb_waFound( AREAP pArea, BOOL * pFound )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waFound(%p, %p)", pArea, pFound));
* pFound = pArea->fFound;
return SUCCESS;
}
/*
* Reposition cursor relative to current position.
*/
static ERRCODE hb_waSkip( AREAP pArea, LONG lToSkip )
{
LONG lSkip;
HB_TRACE(HB_TR_DEBUG, ("hb_waSkip(%p, %ld)", pArea, lToSkip));
/* Flush record and exit */
if( lToSkip == 0 )
return SELF_SKIPRAW( pArea, 0 );
pArea->fTop = pArea->fBottom = FALSE;
if( lToSkip > 0 )
lSkip = 1;
else
{
lSkip = -1;
lToSkip *= -1;
}
while( --lToSkip >= 0 )
{
if( SELF_SKIPRAW( pArea, lSkip ) != SUCCESS )
return FAILURE;
if( SELF_SKIPFILTER( pArea, lSkip ) != SUCCESS )
return FAILURE;
if( pArea->fBof || pArea->fEof )
break;
}
/* Update Bof and Eof flags */
if( lSkip < 0 )
pArea->fEof = FALSE;
else /* ( lSkip > 0 ) */
pArea->fBof = FALSE;
return SUCCESS;
}
/*
* Reposition cursor respecting any filter setting.
*/
static ERRCODE hb_waSkipFilter( AREAP pArea, LONG lUpDown )
{
BOOL fBottom, fDeleted;
ERRCODE uiError;
HB_TRACE(HB_TR_DEBUG, ("hb_waSkipFilter(%p, %ld)", pArea, lUpDown));
if( pArea->dbfi.itmCobExpr == NULL && !hb_setGetDeleted() )
return SUCCESS;
/* Since lToSkip is passed to SkipRaw, it should never request more than
a single skip.
The implied purpose of hb_waSkipFilter is to get off of a "bad" record
after a skip was performed, NOT to skip lToSkip filtered records.
*/
lUpDown = ( lUpDown < 0 ? -1 : 1 );
/* remember if we are here after SLEF_GOTOP() */
fBottom = pArea->fBottom;
while( !pArea->fBof && !pArea->fEof )
{
/* SET DELETED */
if( hb_setGetDeleted() )
{
if( SELF_DELETED( pArea, &fDeleted ) != SUCCESS )
return FAILURE;
if( fDeleted )
{
if( SELF_SKIPRAW( pArea, lUpDown ) != SUCCESS )
return FAILURE;
continue;
}
}
/* SET FILTER TO */
if( pArea->dbfi.itmCobExpr )
{
if( SELF_EVALBLOCK( pArea, pArea->dbfi.itmCobExpr ) != SUCCESS )
return FAILURE;
if( HB_IS_LOGICAL( pArea->valResult ) &&
!hb_itemGetL( pArea->valResult ) )
{
if( SELF_SKIPRAW( pArea, lUpDown ) != SUCCESS )
return FAILURE;
continue;
}
}
break;
}
/*
* The only one situation when we should repos is backward skipping
* if we are at BOTTOM position (it's SKIPFILTER called from GOBOTTOM)
* then GOEOF() if not then GOTOP()
*/
if( pArea->fBof && lUpDown < 0 )
{
if( fBottom )
{
/* GOTO EOF (phantom) record -
this is the only one place where GOTO is used by xHarbour
directly and RDD which does not operate on numbers should
serve this method only as SELF_GOEOF() synonym. If it's a
problem then we can remove this if and always use SELF_GOTOP()
but it also means second table scan if all records filtered
are out of filter so I do not want to do that. I will prefer
explicit add SELF_GOEOF() method
*/
uiError = SELF_GOTO( pArea, 0 );
}
else
{
uiError = SELF_GOTOP( pArea );
pArea->fBof = TRUE;
}
}
else
{
uiError = SUCCESS;
}
return uiError;
}
/*
* Add a field to the WorkArea.
*/
static ERRCODE hb_waAddField( AREAP pArea, LPDBFIELDINFO pFieldInfo )
{
LPFIELD pField;
char szFieldName[ HB_SYMBOL_NAME_LEN + 1 ], *szPtr;
HB_TRACE(HB_TR_DEBUG, ("hb_waAddField(%p, %p)", pArea, pFieldInfo));
/* Validate the name of field */
szPtr = ( char * ) pFieldInfo->atomName;
while( HB_ISSPACE( *szPtr ) )
{
++szPtr;
}
hb_strncpyUpperTrim( szFieldName, szPtr, sizeof( szFieldName ) - 1 );
if( strlen( szFieldName ) == 0 )
return FAILURE;
pField = pArea->lpFields + pArea->uiFieldCount;
if( pArea->uiFieldCount > 0 )
( ( LPFIELD ) ( pField - 1 ) )->lpfNext = pField;
pField->sym = ( void * ) hb_dynsymGetCase( szFieldName );
pField->uiType = pFieldInfo->uiType;
pField->uiTypeExtended = pFieldInfo->uiTypeExtended;
pField->uiLen = pFieldInfo->uiLen;
pField->uiDec = pFieldInfo->uiDec;
pField->uiFlags = pFieldInfo->uiFlags;
pField->uiArea = pArea->uiArea;
pArea->uiFieldCount ++;
return SUCCESS;
}
/*
* Add all fields defined in an array to the WorkArea.
*/
static ERRCODE hb_waCreateFields( AREAP pArea, PHB_ITEM pStruct )
{
USHORT uiItems, uiCount, uiLen, uiDec;
ERRCODE errCode = SUCCESS;
DBFIELDINFO pFieldInfo;
PHB_ITEM pFieldDesc;
int iData;
HB_TRACE(HB_TR_DEBUG, ("hb_waCreateFields(%p, %p)", pArea, pStruct));
uiItems = ( USHORT ) hb_arrayLen( pStruct );
if( SELF_SETFIELDEXTENT( pArea, uiItems ) != SUCCESS )
return FAILURE;
for( uiCount = 0; uiCount < uiItems; uiCount++ )
{
pFieldInfo.uiTypeExtended = 0;
pFieldDesc = hb_arrayGetItemPtr( pStruct, uiCount + 1 );
pFieldInfo.atomName = ( BYTE * ) hb_arrayGetCPtr( pFieldDesc, DBS_NAME );
iData = hb_arrayGetNI( pFieldDesc, DBS_LEN );
if( iData < 0 )
iData = 0;
uiLen = pFieldInfo.uiLen = ( USHORT ) iData;
iData = hb_arrayGetNI( pFieldDesc, DBS_DEC );
if( iData < 0 )
iData = 0;
uiDec = ( USHORT ) iData;
pFieldInfo.uiDec = 0;
#ifdef DBS_FLAG
pFieldInfo.uiFlags = hb_arrayGetNI( pFieldDesc, DBS_FLAG );
#else
pFieldInfo.uiFlags = 0;
#endif
iData = toupper( hb_arrayGetCPtr( pFieldDesc, DBS_TYPE )[ 0 ] );
switch( iData )
{
case 'C':
pFieldInfo.uiType = HB_FT_STRING;
pFieldInfo.uiLen = uiLen;
/* Too many people reported the behavior with code below as a
Clipper compatibility bug so I commented this code. Druzus.
#ifdef HB_C52_STRICT
pFieldInfo.uiLen = uiLen;
#else
pFieldInfo.uiLen = uiLen + uiDec * 256;
#endif
*/
break;
case 'L':
pFieldInfo.uiType = HB_FT_LOGICAL;
pFieldInfo.uiLen = 1;
break;
case 'D':
pFieldInfo.uiType = HB_FT_DATE;
pFieldInfo.uiLen = ( uiLen == 3 || uiLen == 4 ) ? uiLen : 8;
break;
case 'I':
pFieldInfo.uiType = HB_FT_INTEGER;
pFieldInfo.uiLen = ( ( uiLen > 0 && uiLen <= 4 ) || uiLen == 8 ) ? uiLen : 4;
pFieldInfo.uiDec = uiDec;
break;
case 'Y':
pFieldInfo.uiType = HB_FT_CURRENCY;
pFieldInfo.uiLen = 8;
pFieldInfo.uiDec = 4;
break;
case 'Z':
pFieldInfo.uiType = HB_FT_CURDOUBLE;
pFieldInfo.uiLen = 8;
pFieldInfo.uiDec = uiDec;
break;
case '2':
case '4':
pFieldInfo.uiType = HB_FT_INTEGER;
pFieldInfo.uiLen = iData - '0';
break;
case 'B':
case '8':
pFieldInfo.uiType = HB_FT_DOUBLE;
pFieldInfo.uiLen = 8;
pFieldInfo.uiDec = uiDec;
break;
case 'N':
pFieldInfo.uiType = HB_FT_LONG;
pFieldInfo.uiDec = uiDec;
/* DBASE documentation defines maximum numeric field size as 20
* but Clipper alows to create longer fileds so I remove this
* limit, Druzus
*/
/*
if( uiLen > 20 )
*/
if( uiLen > 255 )
errCode = FAILURE;
break;
case 'F':
pFieldInfo.uiType = HB_FT_FLOAT;
pFieldInfo.uiDec = uiDec;
/* see note above */
if( uiLen > 255 )
errCode = FAILURE;
break;
case 'T':
if( uiLen == 8 )
{
pFieldInfo.uiType = HB_FT_DAYTIME;
pFieldInfo.uiLen = 8;
}
else
{
pFieldInfo.uiType = HB_FT_TIME;
pFieldInfo.uiLen = 4;
}
break;
case '@':
pFieldInfo.uiType = HB_FT_DAYTIME;
pFieldInfo.uiLen = 8;
break;
case '=':
pFieldInfo.uiType = HB_FT_MODTIME;
pFieldInfo.uiLen = 8;
break;
case '^':
pFieldInfo.uiType = HB_FT_ROWVER;
pFieldInfo.uiLen = 8;
break;
case '+':
pFieldInfo.uiType = HB_FT_AUTOINC;
pFieldInfo.uiLen = 4;
break;
case 'Q':
pFieldInfo.uiType = HB_FT_VARLENGTH;
pFieldInfo.uiLen = uiLen > 255 ? 255 : uiLen;
break;
case 'M':
pFieldInfo.uiType = HB_FT_MEMO;
pFieldInfo.uiLen = ( uiLen == 4 ) ? 4 : 10;
break;
case 'V':
pFieldInfo.uiType = HB_FT_ANY;
pFieldInfo.uiLen = ( uiLen < 3 || uiLen == 5 ) ? 6 : uiLen;
break;
case 'P':
pFieldInfo.uiType = HB_FT_IMAGE;
pFieldInfo.uiLen = ( uiLen == 4 ) ? 4 : 10;
break;
case 'W':
pFieldInfo.uiType = HB_FT_BLOB;
pFieldInfo.uiLen = ( uiLen == 4 ) ? 4 : 10;
break;
case 'G':
pFieldInfo.uiType = HB_FT_OLE;
pFieldInfo.uiLen = ( uiLen == 4 ) ? 4 : 10;
break;
default:
errCode = FAILURE;
break;
}
if( errCode != SUCCESS )
{
hb_errRT_DBCMD( EG_ARG, EDBCMD_DBCMDBADPARAMETER, NULL, HB_ERR_FUNCNAME );
return errCode;
}
/* Add field */
else if( SELF_ADDFIELD( pArea, &pFieldInfo ) != SUCCESS )
return FAILURE;
}
return SUCCESS;
}
/*
* Determine the number of fields in the WorkArea.
*/
static ERRCODE hb_waFieldCount( AREAP pArea, USHORT * uiFields )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waFieldCount(%p, %p)", pArea, uiFields));
* uiFields = pArea->uiFieldCount;
return SUCCESS;
}
/*
* Retrieve information about a field.
*/
static ERRCODE hb_waFieldInfo( AREAP pArea, USHORT uiIndex, USHORT uiType, PHB_ITEM pItem )
{
LPFIELD pField;
HB_TRACE(HB_TR_DEBUG, ("hb_waFieldInfo(%p, %hu, %hu, %p)", pArea, uiIndex, uiType, pItem));
if( uiIndex > pArea->uiFieldCount )
return FAILURE;
pField = pArea->lpFields + uiIndex - 1;
switch( uiType )
{
case DBS_NAME:
hb_itemPutC( pItem, hb_dynsymName( ( PHB_DYNS ) pField->sym ) );
break;
case DBS_TYPE:
switch( pField->uiType )
{
case HB_FT_STRING:
hb_itemPutC( pItem, "C" );
break;
case HB_FT_LOGICAL:
hb_itemPutC( pItem, "L" );
break;
case HB_FT_DATE:
hb_itemPutC( pItem, "D" );
break;
case HB_FT_LONG:
hb_itemPutC( pItem, "N" );
break;
case HB_FT_INTEGER:
hb_itemPutC( pItem, "I" );
break;
case HB_FT_DOUBLE:
hb_itemPutC( pItem, "B" );
break;
case HB_FT_FLOAT:
hb_itemPutC( pItem, "F" );
break;
case HB_FT_TIME:
hb_itemPutC( pItem, "T" );
break;
case HB_FT_DAYTIME:
hb_itemPutC( pItem, "@" );
break;
case HB_FT_MODTIME:
hb_itemPutC( pItem, "=" );
break;
case HB_FT_ROWVER:
hb_itemPutC( pItem, "^" );
break;
case HB_FT_AUTOINC:
hb_itemPutC( pItem, "+" );
break;
case HB_FT_CURRENCY:
hb_itemPutC( pItem, "Y" );
break;
case HB_FT_CURDOUBLE:
hb_itemPutC( pItem, "Z" );
break;
case HB_FT_VARLENGTH:
hb_itemPutC( pItem, "Q" );
break;
case HB_FT_MEMO:
hb_itemPutC( pItem, "M" );
break;
case HB_FT_ANY:
hb_itemPutC( pItem, "V" );
break;
case HB_FT_IMAGE:
hb_itemPutC( pItem, "P" );
break;
case HB_FT_BLOB:
hb_itemPutC( pItem, "W" );
break;
case HB_FT_OLE:
hb_itemPutC( pItem, "G" );
break;
default:
hb_itemPutC( pItem, "U" );
break;
}
break;
case DBS_LEN:
hb_itemPutNL( pItem, pField->uiLen );
break;
case DBS_DEC:
hb_itemPutNL( pItem, pField->uiDec );
break;
#ifdef DBS_FLAG
case DBS_FLAG:
hb_itemPutNL( pItem, pField->uiFlags );
break;
#endif
default:
return FAILURE;
}
return SUCCESS;
}
/*
* Determine the name associated with a field number.
*/
static ERRCODE hb_waFieldName( AREAP pArea, USHORT uiIndex, void * szName )
{
LPFIELD pField;
HB_TRACE(HB_TR_DEBUG, ("hb_waFieldName(%p, %hu, %p)", pArea, uiIndex, szName));
if( uiIndex > pArea->uiFieldExtent )
return FAILURE;
pField = pArea->lpFields + uiIndex - 1;
hb_strncpy( ( char * ) szName, hb_dynsymName( ( PHB_DYNS ) pField->sym ),
pArea->uiMaxFieldNameLength );
return SUCCESS;
}
/*
* Establish the extent of the array of fields for a WorkArea.
*/
static ERRCODE hb_waSetFieldExtent( AREAP pArea, USHORT uiFieldExtent )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waSetFieldExtent(%p, %hu)", pArea, uiFieldExtent));
pArea->uiFieldExtent = uiFieldExtent;
/* Alloc field array */
if( uiFieldExtent )
{
pArea->lpFields = ( LPFIELD ) hb_xgrab( uiFieldExtent * sizeof( FIELD ) );
memset( pArea->lpFields, 0, uiFieldExtent * sizeof( FIELD ) );
}
return SUCCESS;
}
/*
* Obtain the alias of the WorkArea.
*/
static ERRCODE hb_waAlias( AREAP pArea, BYTE * szAlias )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waAlias(%p, %p)", pArea, szAlias));
hb_strncpy( ( char * ) szAlias,
pArea->atomAlias && hb_dynsymAreaHandle( ( PHB_DYNS ) pArea->atomAlias )
? hb_dynsymName( ( PHB_DYNS ) pArea->atomAlias ) : "",
HB_RDD_MAX_ALIAS_LEN );
return SUCCESS;
}
/*
* Close the table in the WorkArea - helper function
*/
static ERRCODE hb_waCloseAux( AREAP pArea, void * pChildArea )
{
USHORT uiPrevArea, uiArea;
LPDBRELINFO lpdbRelation, lpdbRelPrev, lpdbRelTmp;
uiArea = ( ( AREAP ) pChildArea )->uiArea;
if( pArea->lpdbRelations )
{
uiPrevArea = hb_rddGetCurrentWorkAreaNumber();
lpdbRelation = pArea->lpdbRelations;
lpdbRelPrev = NULL;
while( lpdbRelation )
{
if( lpdbRelation->lpaChild->uiArea == uiArea )
{
/* Clear this relation */
hb_rddSelectWorkAreaNumber( lpdbRelation->lpaChild->uiArea );
SELF_CHILDEND( lpdbRelation->lpaChild, lpdbRelation );
hb_rddSelectWorkAreaNumber( uiPrevArea );
if( lpdbRelation->itmCobExpr )
{
hb_itemRelease( lpdbRelation->itmCobExpr );
}
if( lpdbRelation->abKey )
hb_itemRelease( lpdbRelation->abKey );
lpdbRelTmp = lpdbRelation;
if( lpdbRelPrev )
lpdbRelPrev->lpdbriNext = lpdbRelation->lpdbriNext;
else
pArea->lpdbRelations = lpdbRelation->lpdbriNext;
lpdbRelation = lpdbRelation->lpdbriNext;
hb_xfree( lpdbRelTmp );
}
else
{
lpdbRelPrev = lpdbRelation;
lpdbRelation = lpdbRelation->lpdbriNext;
}
}
}
return SUCCESS;
}
/*
* Close the table in the WorkArea.
*/
static ERRCODE hb_waClose( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waClose(%p)", pArea));
/* Clear items */
SELF_CLEARFILTER( pArea );
SELF_CLEARREL( pArea );
SELF_CLEARLOCATE( pArea );
if( pArea->uiParents > 0 )
{
/* Clear relations that has this area as a child */
hb_rddIterateWorkAreas( hb_waCloseAux, pArea );
}
if( pArea->atomAlias )
hb_dynsymSetAreaHandle( ( PHB_DYNS ) pArea->atomAlias, 0 );
return SUCCESS;
}
/*
* Retrieve information about the current driver.
*/
static ERRCODE hb_waInfo( AREAP pArea, USHORT uiIndex, PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waInfo(%p, %hu, %p)", pArea, uiIndex, pItem));
switch( uiIndex )
{
case DBI_ISDBF:
case DBI_CANPUTREC:
case DBI_ISFLOCK:
case DBI_SHARED:
hb_itemPutL( pItem, FALSE );
break;
/*
* IMHO better to return FAILURE to notice that it's not supported
*/
case DBI_GETDELIMITER:
case DBI_SETDELIMITER:
case DBI_SEPARATOR:
hb_itemPutC( pItem, NULL );
return FAILURE;
case DBI_GETHEADERSIZE:
case DBI_GETRECSIZE:
case DBI_LOCKCOUNT:
hb_itemPutNI( pItem, 0 );
break;
case DBI_LASTUPDATE:
hb_itemPutDL( pItem, 0 );
break;
case DBI_GETLOCKARRAY:
hb_arrayNew( pItem, 0 );
break;
case DBI_CHILDCOUNT:
{
LPDBRELINFO lpdbRelations = pArea->lpdbRelations;
USHORT uiCount = 0;
while( lpdbRelations )
{
uiCount++;
lpdbRelations = lpdbRelations->lpdbriNext;
}
hb_itemPutNI( pItem, uiCount );
break;
}
case DBI_BOF:
hb_itemPutL( pItem, pArea->fBof );
break;
case DBI_EOF:
hb_itemPutL( pItem, pArea->fEof );
break;
case DBI_DBFILTER:
if( pArea->dbfi.abFilterText )
hb_itemCopy( pItem, pArea->dbfi.abFilterText );
else
hb_itemPutC( pItem, NULL );
break;
case DBI_FOUND:
hb_itemPutL( pItem, pArea->fFound );
break;
case DBI_FCOUNT:
hb_itemPutNI( pItem, pArea->uiFieldCount );
break;
case DBI_ALIAS:
{
char szAlias[ HB_RDD_MAX_ALIAS_LEN + 1 ];
if( SELF_ALIAS( pArea, ( BYTE * ) szAlias ) != SUCCESS )
{
return FAILURE;
}
hb_itemPutC( pItem, szAlias );
break;
}
case DBI_TABLEEXT:
hb_itemClear( pItem );
return SELF_RDDINFO( SELF_RDDNODE( pArea ), RDDI_TABLEEXT, 0, pItem );
case DBI_SCOPEDRELATION:
{
int iRelNo = hb_itemGetNI( pItem );
BOOL fScoped = FALSE;
if( iRelNo > 0 )
{
LPDBRELINFO lpdbRelations = pArea->lpdbRelations;
while( lpdbRelations )
{
if( --iRelNo == 0 )
{
fScoped = lpdbRelations->isScoped;
break;
}
lpdbRelations = lpdbRelations->lpdbriNext;
}
}
hb_itemPutL( pItem, fScoped );
break;
}
case DBI_POSITIONED:
{
ULONG ulRecCount, ulRecNo;
if( SELF_RECNO( pArea, &ulRecNo ) != SUCCESS )
return FAILURE;
if( ulRecNo == 0 )
hb_itemPutL( pItem, FALSE );
else if( SELF_RECCOUNT( pArea, &ulRecCount ) != SUCCESS )
return FAILURE;
else
hb_itemPutL( pItem, ulRecNo != ulRecCount + 1 );
break;
}
case DBI_RM_SUPPORTED:
hb_itemPutL( pItem, FALSE );
break;
case DBI_DB_VERSION:
hb_itemPutC( pItem, NULL );
break;
case DBI_RDD_VERSION:
hb_itemPutC( pItem, NULL );
break;
default:
return FAILURE;
}
return SUCCESS;
}
/*
* Retrieve information about the current order that SELF could not.
* Called by SELF_ORDINFO if uiIndex is not supported.
*/
static ERRCODE hb_waOrderInfo( AREAP pArea, USHORT index, LPDBORDERINFO pInfo )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waOrderInfo(%p, %hu, %p)", pArea, index, pInfo));
HB_SYMBOL_UNUSED( pArea );
HB_SYMBOL_UNUSED( index );
if( pInfo->itmResult )
hb_itemClear( pInfo->itmResult );
/* CA-Cl*pper does not generate RT error when default ORDERINFO() method
* is called
*/
/* hb_errRT_DBCMD( EG_ARG, EDBCMD_BADPARAMETER, NULL, HB_ERR_FUNCNAME ); */
return FAILURE;
}
/*
* Clear the WorkArea for use.
*/
static ERRCODE hb_waNewArea( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waNewArea(%p)", pArea));
pArea->valResult = hb_itemNew( NULL );
pArea->lpdbRelations = NULL;
pArea->uiParents = 0;
pArea->uiMaxFieldNameLength = 10;
return SUCCESS;
}
/*
* Open a data store in the WorkArea.
* Like in Clipper it's also mapped as Create() method at WA level
*/
static ERRCODE hb_waOpen( AREAP pArea, LPDBOPENINFO pInfo )
{
if( !pArea->atomAlias && pInfo->atomAlias && pInfo->atomAlias[ 0 ] )
{
pArea->atomAlias = hb_rddAllocWorkAreaAlias( ( char * ) pInfo->atomAlias,
( int ) pInfo->uiArea );
if( ! pArea->atomAlias )
{
SELF_CLOSE( ( AREAP ) pArea );
return FAILURE;
}
}
return SUCCESS;
}
static ERRCODE hb_waOrderCondition( AREAP pArea, LPDBORDERCONDINFO param )
{
if( pArea->lpdbOrdCondInfo )
{
if( pArea->lpdbOrdCondInfo->abFor )
hb_xfree( pArea->lpdbOrdCondInfo->abFor );
if( pArea->lpdbOrdCondInfo->abWhile )
hb_xfree( pArea->lpdbOrdCondInfo->abWhile );
if( pArea->lpdbOrdCondInfo->itmCobFor )
{
hb_itemRelease( pArea->lpdbOrdCondInfo->itmCobFor );
}
if( pArea->lpdbOrdCondInfo->itmCobWhile )
{
hb_itemRelease( pArea->lpdbOrdCondInfo->itmCobWhile );
}
if( pArea->lpdbOrdCondInfo->itmCobEval )
{
hb_itemRelease( pArea->lpdbOrdCondInfo->itmCobEval );
}
if( pArea->lpdbOrdCondInfo->itmStartRecID )
{
hb_itemRelease( pArea->lpdbOrdCondInfo->itmStartRecID );
}
if( pArea->lpdbOrdCondInfo->itmRecID )
{
hb_itemRelease( pArea->lpdbOrdCondInfo->itmRecID );
}
hb_xfree( pArea->lpdbOrdCondInfo );
}
pArea->lpdbOrdCondInfo = param;
return SUCCESS;
}
/*
* Release all references to a WorkArea.
*/
static ERRCODE hb_waRelease( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waRelease(%p)", pArea));
/* Free all allocated pointers */
if( pArea->lpFields )
hb_xfree( pArea->lpFields );
if( pArea->valResult )
hb_itemRelease( pArea->valResult );
if( pArea->lpdbOrdCondInfo )
/* intentionally direct call not a method */
hb_waOrderCondition( pArea,NULL );
hb_xfree( pArea );
return SUCCESS;
}
/*
* Retrieve the size of the WorkArea structure.
*/
static ERRCODE hb_waStructSize( AREAP pArea, USHORT * uiSize )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waStrucSize(%p, %p)", pArea, uiSize));
HB_SYMBOL_UNUSED( pArea );
* uiSize = sizeof( AREA );
return SUCCESS;
}
/*
* Obtain the name of replaceable database driver (RDD) subsystem.
*/
static ERRCODE hb_waSysName( AREAP pArea, BYTE * pBuffer )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waSysName(%p, %p)", pArea, pBuffer));
hb_strncpy( ( char * ) pBuffer, SELF_RDDNODE( pArea )->szName,
HB_RDD_MAX_DRIVERNAME_LEN );
return SUCCESS;
}
/*
* Evaluate code block for each record in WorkArea.
*/
static ERRCODE hb_waEval( AREAP pArea, LPDBEVALINFO pEvalInfo )
{
LONG lNext = 1;
BOOL fEof, fFor;
HB_TRACE(HB_TR_DEBUG, ("hb_waEval(%p, %p)", pArea, pEvalInfo));
if( pEvalInfo->dbsci.itmRecID )
{
if( SELF_GOTOID( pArea, pEvalInfo->dbsci.itmRecID ) != SUCCESS )
return FAILURE;
}
else if( pEvalInfo->dbsci.lNext )
{
lNext = hb_itemGetNL( pEvalInfo->dbsci.lNext );
}
else if( !pEvalInfo->dbsci.itmCobWhile &&
!hb_itemGetL( pEvalInfo->dbsci.fRest ) )
{
if( SELF_GOTOP( pArea ) != SUCCESS )
return FAILURE;
}
/* TODO: use SKIPSCOPE() method and fRest parameter */
if( !pEvalInfo->dbsci.lNext || lNext > 0 )
{
for( ;; )
{
if( SELF_EOF( pArea, &fEof ) != SUCCESS )
return FAILURE;
if( fEof )
break;
if( pEvalInfo->dbsci.itmCobWhile )
{
if( SELF_EVALBLOCK( pArea, pEvalInfo->dbsci.itmCobWhile ) != SUCCESS )
return FAILURE;
if( ! hb_itemGetL( pArea->valResult ) )
break;
}
if( pEvalInfo->dbsci.itmCobFor )
{
if( SELF_EVALBLOCK( pArea, pEvalInfo->dbsci.itmCobFor ) != SUCCESS )
return FAILURE;
fFor = hb_itemGetL( pArea->valResult );
}
else
fFor = TRUE;
if( fFor )
{
if( SELF_EVALBLOCK( pArea, pEvalInfo->itmBlock ) != SUCCESS )
return FAILURE;
}
if( pEvalInfo->dbsci.itmRecID || ( pEvalInfo->dbsci.lNext && --lNext < 1 ) )
break;
if( SELF_SKIP( pArea, 1 ) != SUCCESS )
return FAILURE;
}
}
return SUCCESS;
}
/*
* Locate a record which pass given condition
*/
static ERRCODE hb_waLocate( AREAP pArea, BOOL fContinue )
{
LONG lNext = 1;
BOOL fEof;
HB_TRACE(HB_TR_DEBUG, ("hb_waLocate(%p, %d)", pArea, fContinue));
if( fContinue )
{
if( ! pArea->dbsi.itmCobFor )
return SUCCESS;
if( SELF_SKIP( pArea, 1 ) != SUCCESS )
return FAILURE;
}
else if( pArea->dbsi.itmRecID )
{
if( SELF_GOTOID( pArea, pArea->dbsi.itmRecID ) != SUCCESS )
return FAILURE;
}
else if( pArea->dbsi.lNext )
{
lNext = hb_itemGetNL( pArea->dbsi.lNext );
}
else if( !pArea->dbsi.itmCobWhile &&
!hb_itemGetL( pArea->dbsi.fRest ) )
{
if( SELF_GOTOP( pArea ) != SUCCESS )
return FAILURE;
}
pArea->fFound = FALSE;
/* TODO: use SKIPSCOPE() method and fRest parameter */
if( !pArea->dbsi.lNext || lNext > 0 )
{
for( ;; )
{
if( SELF_EOF( pArea, &fEof ) != SUCCESS )
return FAILURE;
if( fEof )
break;
if( !fContinue && pArea->dbsi.itmCobWhile )
{
if( SELF_EVALBLOCK( pArea, pArea->dbsi.itmCobWhile ) != SUCCESS )
return FAILURE;
if( ! hb_itemGetL( pArea->valResult ) )
break;
}
if( ! pArea->dbsi.itmCobFor )
{
pArea->fFound = TRUE;
break;
}
else
{
if( SELF_EVALBLOCK( pArea, pArea->dbsi.itmCobFor ) != SUCCESS )
return FAILURE;
if( hb_itemGetL( pArea->valResult ) )
{
pArea->fFound = TRUE;
break;
}
}
if( !fContinue &&
( pArea->dbsi.itmRecID || ( pArea->dbsi.lNext && --lNext < 1 ) ) )
break;
if( SELF_SKIP( pArea, 1 ) != SUCCESS )
return FAILURE;
}
}
return SUCCESS;
}
/*
* Copy one or more records from one WorkArea to another.
*/
static ERRCODE hb_waTrans( AREAP pArea, LPDBTRANSINFO pTransInfo )
{
LONG lNext = 1;
BOOL fEof, fFor;
HB_TRACE(HB_TR_DEBUG, ("hb_waTrans(%p, %p)", pArea, pTransInfo));
if( pTransInfo->dbsci.itmRecID )
{
if( SELF_GOTOID( pArea, pTransInfo->dbsci.itmRecID ) != SUCCESS )
return FAILURE;
}
else if( pTransInfo->dbsci.lNext )
{
lNext = hb_itemGetNL( pTransInfo->dbsci.lNext );
}
else if( !pTransInfo->dbsci.itmCobWhile &&
!hb_itemGetL( pTransInfo->dbsci.fRest ) )
{
if( SELF_GOTOP( pArea ) != SUCCESS )
return FAILURE;
}
/* TODO: use SKIPSCOPE() method and fRest parameter */
if( !pTransInfo->dbsci.lNext || lNext > 0 )
{
for( ;; )
{
if( SELF_EOF( pArea, &fEof ) != SUCCESS )
return FAILURE;
if( fEof )
break;
if( pTransInfo->dbsci.itmCobWhile )
{
if( SELF_EVALBLOCK( pArea, pTransInfo->dbsci.itmCobWhile ) != SUCCESS )
return FAILURE;
if( ! hb_itemGetL( pArea->valResult ) )
break;
}
if( pTransInfo->dbsci.itmCobFor )
{
if( SELF_EVALBLOCK( pArea, pTransInfo->dbsci.itmCobFor ) != SUCCESS )
return FAILURE;
fFor = hb_itemGetL( pArea->valResult );
}
else
fFor = TRUE;
if( fFor )
{
if( SELF_TRANSREC( pArea, pTransInfo ) != SUCCESS )
return FAILURE;
}
if( pTransInfo->dbsci.itmRecID || ( pTransInfo->dbsci.lNext && --lNext < 1 ) )
break;
if( SELF_SKIP( pArea, 1 ) != SUCCESS )
return FAILURE;
}
}
return SUCCESS;
}
/*
* Copy a record to another WorkArea.
*/
static ERRCODE hb_waTransRec( AREAP pArea, LPDBTRANSINFO pTransInfo )
{
BOOL bDeleted;
BYTE *pRecord;
ERRCODE errCode;
HB_TRACE(HB_TR_DEBUG, ("hb_waTransRec(%p, %p)", pArea, pTransInfo));
/* Record deleted? */
errCode = SELF_DELETED( ( AREAP ) pArea, &bDeleted );
if( errCode != SUCCESS )
return errCode;
if( pTransInfo->uiFlags & DBTF_MATCH && pTransInfo->uiFlags & DBTF_PUTREC )
{
errCode = SELF_GETREC( ( AREAP ) pArea, &pRecord );
if( errCode != SUCCESS )
return errCode;
/* Append a new record */
errCode = SELF_APPEND( ( AREAP ) pTransInfo->lpaDest, TRUE );
if( errCode != SUCCESS )
return errCode;
/* Copy record */
errCode = SELF_PUTREC( ( AREAP ) pTransInfo->lpaDest, pRecord );
}
else
{
LPDBTRANSITEM pTransItem;
PHB_ITEM pItem;
USHORT uiCount;
/* Append a new record */
errCode = SELF_APPEND( ( AREAP ) pTransInfo->lpaDest, TRUE );
if( errCode != SUCCESS )
return errCode;
pItem = hb_itemNew( NULL );
pTransItem = pTransInfo->lpTransItems;
for( uiCount = pTransInfo->uiItemCount; uiCount; --uiCount )
{
errCode = SELF_GETVALUE( ( AREAP ) pArea,
pTransItem->uiSource, pItem );
if( errCode != SUCCESS )
break;
errCode = SELF_PUTVALUE( ( AREAP ) pTransInfo->lpaDest,
pTransItem->uiDest, pItem );
if( errCode != SUCCESS )
break;
++pTransItem;
}
hb_itemRelease( pItem );
}
/* Delete the new record if copy fail */
if( errCode != SUCCESS )
{
SELF_DELETE( ( AREAP ) pTransInfo->lpaDest );
return errCode;
}
/* Delete the new record */
if( bDeleted )
return SELF_DELETE( ( AREAP ) pTransInfo->lpaDest );
return SUCCESS;
}
/*
* Report end of relation.
*/
static ERRCODE hb_waChildEnd( AREAP pArea, LPDBRELINFO pRelInfo )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waChildEnd(%p, %p)", pArea, pRelInfo));
if( pRelInfo->isScoped )
{
DBORDERINFO pInfo;
pInfo.itmOrder = NULL;
pInfo.atomBagName = NULL;
pInfo.itmResult = hb_itemNew( NULL );
pInfo.itmNewVal = NULL;
SELF_ORDINFO( pArea, DBOI_SCOPETOPCLEAR, &pInfo );
SELF_ORDINFO( pArea, DBOI_SCOPEBOTTOMCLEAR, &pInfo );
hb_itemRelease( pInfo.itmResult );
}
pArea->uiParents--;
return SUCCESS;
}
/*
* Report initialization of a relation.
*/
static ERRCODE hb_waChildStart( AREAP pArea, LPDBRELINFO pRelInfo )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waChildStart(%p, %p)", pArea, pRelInfo));
HB_SYMBOL_UNUSED( pRelInfo );
pArea->uiParents ++;
return SUCCESS;
}
/*
* Force relational movement in child WorkAreas.
*/
static ERRCODE hb_waSyncChildren( AREAP pArea )
{
LPDBRELINFO lpdbRelation;
HB_TRACE(HB_TR_DEBUG, ("hb_waSyncChildren(%p)", pArea));
lpdbRelation = pArea->lpdbRelations;
while( lpdbRelation )
{
if( SELF_CHILDSYNC( lpdbRelation->lpaChild, lpdbRelation ) != SUCCESS )
return FAILURE;
lpdbRelation = lpdbRelation->lpdbriNext;
}
return SUCCESS;
}
/*
* Clear all relations in the specified WorkArea.
*/
static ERRCODE hb_waClearRel( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waClearRel(%p)", pArea ));
/* Free all relations */
if( pArea->lpdbRelations )
{
int iCurrArea = hb_rddGetCurrentWorkAreaNumber();
do
{
LPDBRELINFO lpdbRelation = pArea->lpdbRelations;
hb_rddSelectWorkAreaNumber( lpdbRelation->lpaChild->uiArea );
SELF_CHILDEND( lpdbRelation->lpaChild, lpdbRelation );
pArea->lpdbRelations = lpdbRelation->lpdbriNext;
if( lpdbRelation->itmCobExpr )
{
hb_itemRelease( lpdbRelation->itmCobExpr );
}
if( lpdbRelation->abKey )
{
hb_itemRelease( lpdbRelation->abKey );
}
hb_xfree( lpdbRelation );
}
while( pArea->lpdbRelations );
hb_rddSelectWorkAreaNumber( iCurrArea );
}
return SUCCESS;
}
/*
* Obtain the workarea number of the specified relation.
*/
static ERRCODE hb_waRelArea( AREAP pArea, USHORT uiRelNo, void * pRelArea )
{
LPDBRELINFO lpdbRelations;
USHORT uiIndex = 1;
USHORT * pWA = (USHORT *) pRelArea;
/*TODO: Why pRelArea declared as void*? This creates casting hassles.*/
HB_TRACE(HB_TR_DEBUG, ("hb_waRelArea(%p, %hu, %p)", pArea, uiRelNo, pRelArea));
*pWA = 0;
lpdbRelations = pArea->lpdbRelations;
while( lpdbRelations )
{
if( uiIndex++ == uiRelNo )
{
*pWA = lpdbRelations->lpaChild->uiArea;
break;
}
lpdbRelations = lpdbRelations->lpdbriNext;
}
return *pWA ? SUCCESS : FAILURE;
}
/*
* Evaluate a block against the relation in specified WorkArea.
*/
static ERRCODE hb_waRelEval( AREAP pArea, LPDBRELINFO pRelInfo )
{
PHB_ITEM pResult;
DBORDERINFO pInfo;
ERRCODE errCode;
int iOrder;
HB_TRACE(HB_TR_DEBUG, ("hb_waRelEval(%p, %p)", pArea, pRelInfo));
errCode = SELF_EVALBLOCK( pRelInfo->lpaParent, pRelInfo->itmCobExpr );
if( errCode == SUCCESS )
{
/*
* Check the current order
*/
pResult = pRelInfo->lpaParent->valResult;
pRelInfo->lpaParent->valResult = NULL;
memset( &pInfo, 0, sizeof( DBORDERINFO ) );
pInfo.itmResult = hb_itemPutNI( NULL, 0 );
errCode = SELF_ORDINFO( pArea, DBOI_NUMBER, &pInfo );
if( errCode == SUCCESS )
{
iOrder = hb_itemGetNI( pInfo.itmResult );
if( iOrder != 0 )
{
if( pRelInfo->isScoped )
{
pInfo.itmNewVal = pResult;
errCode = SELF_ORDINFO( pArea, DBOI_SCOPETOP, &pInfo );
if( errCode == SUCCESS )
errCode = SELF_ORDINFO( pArea, DBOI_SCOPEBOTTOM, &pInfo );
}
if( errCode == SUCCESS )
errCode = SELF_SEEK( pArea, FALSE, pResult, FALSE );
}
else
{
/*
* If current order equals to zero, use GOTOID instead of SEEK
* Unfortunately it interacts with buggy .prg code which returns
* non numerical values from relation expression and RDD accepts
* only numerical record ID. In such case SELF_GOTO() works like
* SELF_GOEOF() but SELF_GOTOID() reports error. So for Clipper
* compatibility SELF_GOTO() is used here but if RDD can use
* non numerical record IDs then this method should be overloaded
* to use SELF_GOTOID(), [druzus]
*/
/* errCode = SELF_GOTOID( pArea, pResult ); */
errCode = SELF_GOTO( pArea, hb_itemGetNL( pResult ) );
}
}
hb_itemRelease( pInfo.itmResult );
hb_itemRelease( pResult );
}
return errCode;
}
/*
* Obtain the character expression of the specified relation.
*/
static ERRCODE hb_waRelText( AREAP pArea, USHORT uiRelNo, PHB_ITEM pExpr )
{
LPDBRELINFO lpdbRelations;
USHORT uiIndex = 1;
HB_TRACE(HB_TR_DEBUG, ("hb_waRelText(%p, %hu, %p)", pArea, uiRelNo, pExpr));
lpdbRelations = pArea->lpdbRelations;
while( lpdbRelations )
{
if( uiIndex++ == uiRelNo )
{
hb_itemCopy( pExpr, lpdbRelations->abKey );
return SUCCESS;
}
lpdbRelations = lpdbRelations->lpdbriNext;
}
return FAILURE;
}
/*
* Set a relation in the parent file.
*/
static ERRCODE hb_waSetRel( AREAP pArea, LPDBRELINFO lpdbRelInf )
{
LPDBRELINFO lpdbRelations;
HB_TRACE(HB_TR_DEBUG, ("hb_waSetRel(%p, %p)", pArea, lpdbRelInf));
lpdbRelations = pArea->lpdbRelations;
if( ! lpdbRelations )
{
pArea->lpdbRelations = ( LPDBRELINFO ) hb_xgrab( sizeof( DBRELINFO ) );
lpdbRelations = pArea->lpdbRelations;
}
else
{
while( lpdbRelations->lpdbriNext )
lpdbRelations = lpdbRelations->lpdbriNext;
lpdbRelations->lpdbriNext = ( LPDBRELINFO ) hb_xgrab( sizeof( DBRELINFO ) );
lpdbRelations = lpdbRelations->lpdbriNext;
}
lpdbRelations->lpaParent = pArea;
lpdbRelations->lpaChild = lpdbRelInf->lpaChild;
lpdbRelations->itmCobExpr = lpdbRelInf->itmCobExpr;
lpdbRelations->isScoped = lpdbRelInf->isScoped;
lpdbRelations->isOptimized = lpdbRelInf->isOptimized;
lpdbRelations->abKey = lpdbRelInf->abKey;
lpdbRelations->lpdbriNext = lpdbRelInf->lpdbriNext;
return SELF_CHILDSTART( ( AREAP ) lpdbRelInf->lpaChild, lpdbRelations );
}
/*
* Clear the active filter expression.
*/
static ERRCODE hb_waClearFilter( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waClearFilter(%p)", pArea));
/* Free all items */
if( pArea->dbfi.itmCobExpr )
{
hb_itemRelease( pArea->dbfi.itmCobExpr );
pArea->dbfi.itmCobExpr = NULL;
}
if( pArea->dbfi.abFilterText )
{
hb_itemRelease( pArea->dbfi.abFilterText );
pArea->dbfi.abFilterText = NULL;
}
pArea->dbfi.fOptimized = FALSE;
pArea->dbfi.fFilter = FALSE;
return SUCCESS;
}
/*
* Clear the active locate expression.
*/
static ERRCODE hb_waClearLocate( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waClearLocate(%p)", pArea));
/* Free all items */
if( pArea->dbsi.itmCobFor )
{
hb_itemRelease( pArea->dbsi.itmCobFor );
pArea->dbsi.itmCobFor = NULL;
}
if( pArea->dbsi.lpstrFor )
{
hb_itemRelease( pArea->dbsi.lpstrFor );
pArea->dbsi.lpstrFor = NULL;
}
if( pArea->dbsi.itmCobWhile )
{
hb_itemRelease( pArea->dbsi.itmCobWhile );
pArea->dbsi.itmCobWhile = NULL;
}
if( pArea->dbsi.lpstrWhile )
{
hb_itemRelease( pArea->dbsi.lpstrWhile );
pArea->dbsi.lpstrWhile = NULL;
}
if( pArea->dbsi.lNext )
{
hb_itemRelease( pArea->dbsi.lNext );
pArea->dbsi.lNext = NULL;
}
if( pArea->dbsi.itmRecID )
{
hb_itemRelease( pArea->dbsi.itmRecID );
pArea->dbsi.itmRecID = NULL;
}
if( pArea->dbsi.fRest )
{
hb_itemRelease( pArea->dbsi.fRest );
pArea->dbsi.fRest = NULL;
}
return SUCCESS;
}
/*
* Return filter condition of the specified WorkArea.
*/
static ERRCODE hb_waFilterText( AREAP pArea, PHB_ITEM pFilter )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waFilterText(%p, %p)", pArea, pFilter));
if( pArea->dbfi.abFilterText )
hb_itemCopy( pFilter, pArea->dbfi.abFilterText );
return SUCCESS;
}
/*
* Set the filter condition for the specified WorkArea.
*/
static ERRCODE hb_waSetFilter( AREAP pArea, LPDBFILTERINFO pFilterInfo )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waSetFilter(%p, %p)", pArea, pFilterInfo));
/* Clear the active filter expression */
if( SELF_CLEARFILTER( pArea ) != SUCCESS )
return FAILURE;
if( pFilterInfo->itmCobExpr )
{
pArea->dbfi.itmCobExpr = hb_itemNew( pFilterInfo->itmCobExpr );
}
if( pFilterInfo->abFilterText )
{
pArea->dbfi.abFilterText = hb_itemNew( pFilterInfo->abFilterText );
}
pArea->dbfi.fOptimized = pFilterInfo->fOptimized;
pArea->dbfi.fFilter = TRUE;
return SUCCESS;
}
/*
* Set the locate scope for the specified WorkArea.
*/
static ERRCODE hb_waSetLocate( AREAP pArea, LPDBSCOPEINFO pScopeInfo )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waSetLocate(%p, %p)", pArea, pScopeInfo));
/* Clear the active locate expression */
if( SELF_CLEARLOCATE( pArea ) != SUCCESS )
return FAILURE;
if( pScopeInfo->itmCobFor )
pArea->dbsi.itmCobFor = hb_itemNew( pScopeInfo->itmCobFor );
if( pScopeInfo->lpstrFor )
pArea->dbsi.lpstrFor = hb_itemNew( pScopeInfo->lpstrFor );
if( pScopeInfo->itmCobWhile )
pArea->dbsi.itmCobWhile = hb_itemNew( pScopeInfo->itmCobWhile );
if( pScopeInfo->lpstrWhile )
pArea->dbsi.lpstrWhile = hb_itemNew( pScopeInfo->lpstrWhile );
if( pScopeInfo->lNext )
pArea->dbsi.lNext = hb_itemNew( pScopeInfo->lNext );
if( pScopeInfo->itmRecID )
pArea->dbsi.itmRecID = hb_itemNew( pScopeInfo->itmRecID );
if( pScopeInfo->fRest )
pArea->dbsi.fRest = hb_itemNew( pScopeInfo->fRest );
pArea->dbsi.fIgnoreFilter = pScopeInfo->fIgnoreFilter;
pArea->dbsi.fIncludeDeleted = pScopeInfo->fIncludeDeleted;
pArea->dbsi.fLast = pScopeInfo->fLast;
pArea->dbsi.fIgnoreDuplicates = pScopeInfo->fIgnoreDuplicates;
pArea->dbsi.fBackward = pScopeInfo->fBackward;
pArea->dbsi.fOptimized = pScopeInfo->fOptimized;
return SUCCESS;
}
/*
* Compile a character expression.
*/
static ERRCODE hb_waCompile( AREAP pArea, BYTE * pExpr )
{
HB_MACRO_PTR pMacro;
HB_TRACE(HB_TR_DEBUG, ("hb_waCompile(%p, %p)", pArea, pExpr));
pMacro = hb_macroCompile( ( char * ) pExpr );
if( pMacro )
{
pArea->valResult = hb_itemPutPtr( pArea->valResult, ( void * ) pMacro );
return SUCCESS;
}
else
return FAILURE;
}
/*
* Raise a runtime error.
*/
static ERRCODE hb_waError( AREAP pArea, PHB_ITEM pError )
{
char * szRddName;
HB_TRACE(HB_TR_DEBUG, ("hb_waError(%p, %p)", pArea, pError));
szRddName = ( char * ) hb_xgrab( HB_RDD_MAX_DRIVERNAME_LEN + 1 );
if( pArea && pArea->lprfsHost->sysName )
SELF_SYSNAME( pArea, ( BYTE * ) szRddName );
else
hb_strncpy( szRddName, "???DRIVER", HB_RDD_MAX_DRIVERNAME_LEN );
hb_errPutSeverity( pError, ES_ERROR );
hb_errPutSubSystem( pError, szRddName );
hb_xfree( szRddName );
return hb_errLaunch( pError );
}
/*
* Evaluate a code block.
*/
static ERRCODE hb_waEvalBlock( AREAP pArea, PHB_ITEM pBlock )
{
PHB_ITEM pItem;
int iCurrArea;
HB_TRACE(HB_TR_DEBUG, ("hb_waEvalBlock(%p, %p)", pArea, pBlock));
iCurrArea = hb_rddGetCurrentWorkAreaNumber();
if( iCurrArea != pArea->uiArea )
hb_rddSelectWorkAreaNumber( pArea->uiArea );
pItem = hb_vmEvalBlockOrMacro( pBlock );
if( ! pArea->valResult )
pArea->valResult = hb_itemNew( NULL );
hb_itemCopy( pArea->valResult, pItem );
hb_rddSelectWorkAreaNumber( iCurrArea );
return hb_vmRequestQuery() ? FAILURE : SUCCESS;
}
/*
* RDD info
*/
static ERRCODE hb_waRddInfo( LPRDDNODE pRDD, USHORT uiIndex, ULONG ulConnection, PHB_ITEM pItem )
{
BOOL fResult;
int iResult;
HB_TRACE(HB_TR_DEBUG, ("hb_rddInfo(%p, %hu, %lu, %p)", pRDD, uiIndex, ulConnection, pItem));
HB_SYMBOL_UNUSED( pRDD );
HB_SYMBOL_UNUSED( ulConnection );
switch( uiIndex )
{
case RDDI_ISDBF:
case RDDI_CANPUTREC:
case RDDI_LOCAL:
case RDDI_REMOTE:
case RDDI_RECORDMAP:
case RDDI_ENCRYPTION:
case RDDI_AUTOLOCK:
case RDDI_STRUCTORD:
case RDDI_LARGEFILE:
case RDDI_MULTITAG:
case RDDI_SORTRECNO:
case RDDI_MULTIKEY:
case RDDI_BLOB_SUPPORT:
hb_itemPutL( pItem, FALSE );
break;
case RDDI_CONNECTION:
case RDDI_TABLETYPE:
case RDDI_MEMOTYPE:
case RDDI_MEMOVERSION:
hb_itemPutNI( pItem, 0 );
break;
case RDDI_STRICTREAD:
fResult = hb_setGetStrictRead();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_STRICTREAD, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_OPTIMIZE:
fResult = hb_setGetOptimize();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_OPTIMIZE, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_FORCEOPT:
fResult = hb_setGetForceOpt();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_FORCEOPT, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_AUTOOPEN:
fResult = hb_setGetAutOpen();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_AUTOPEN, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_AUTOORDER:
fResult = hb_setGetAutOrder();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_AUTORDER, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_AUTOSHARE:
fResult = hb_setGetAutoShare();
if( hb_itemType( pItem ) == HB_IT_LOGICAL )
hb_setSetItem( HB_SET_AUTOSHARE, pItem );
hb_itemPutL( pItem, fResult );
break;
case RDDI_LOCKSCHEME:
iResult = hb_setGetDBFLockScheme();
if( hb_itemType( pItem ) & HB_IT_NUMERIC )
hb_setSetItem( HB_SET_DBFLOCKSCHEME, pItem );
hb_itemPutNI( pItem, iResult );
break;
case RDDI_MEMOBLOCKSIZE:
iResult = hb_setGetMBlockSize();
if( hb_itemType( pItem ) & HB_IT_NUMERIC )
hb_setSetItem( HB_SET_MBLOCKSIZE, pItem );
hb_itemPutNI( pItem, iResult );
break;
case RDDI_MEMOEXT:
{
char * szResult = hb_setGetMFileExt();
if( szResult )
szResult = hb_strdup( szResult );
if( hb_itemType( pItem ) & HB_IT_STRING )
{
hb_setSetItem( HB_SET_MFILEEXT, pItem );
if( szResult )
hb_itemPutCLPtr( pItem, szResult, strlen( szResult ) );
else
hb_itemPutC( pItem, NULL );
break;
}
else if( szResult )
{
hb_itemPutCLPtr( pItem, szResult, strlen( szResult ) );
break;
}
/* no break - return FAILURE */
}
case RDDI_TABLEEXT:
case RDDI_ORDBAGEXT:
case RDDI_ORDEREXT:
case RDDI_ORDSTRUCTEXT:
case RDDI_DELIMITER:
case RDDI_SEPARATOR:
case RDDI_TRIGGER:
case RDDI_PENDINGTRIGGER:
hb_itemPutC( pItem, NULL );
/* no break - return FAILURE */
default:
return FAILURE;
}
return SUCCESS;
}
/*
* Raise a runtime error if an method is not defined.
*/
static ERRCODE hb_waUnsupported( AREAP pArea )
{
PHB_ITEM pError;
HB_TRACE(HB_TR_DEBUG, ("hb_waUnsupported(%p)", pArea));
pError = hb_errNew();
hb_errPutGenCode( pError, EG_UNSUPPORTED );
hb_errPutDescription( pError, hb_langDGetErrorDesc( EG_UNSUPPORTED ) );
SELF_ERROR( pArea, pError );
hb_itemRelease( pError );
return FAILURE;
}
/*
* Raise a runtime error if an method is not defined.
*/
static ERRCODE hb_waRddUnsupported( LPRDDNODE pRDD )
{
PHB_ITEM pError;
HB_TRACE(HB_TR_DEBUG, ("hb_waRDDUnsupported(%p)", pRDD));
pError = hb_errNew();
hb_errPutGenCode( pError, EG_UNSUPPORTED );
hb_errPutDescription( pError, hb_langDGetErrorDesc( EG_UNSUPPORTED ) );
hb_errPutSeverity( pError, ES_ERROR );
hb_errPutSubSystem( pError, pRDD->szName );
hb_errLaunch( pError );
hb_itemRelease( pError );
return FAILURE;
}
#if 0
/*
* Empty method.
*/
static ERRCODE hb_waNull( AREAP pArea )
{
HB_TRACE(HB_TR_DEBUG, ("hb_waNull(%p)", pArea));
HB_SYMBOL_UNUSED( pArea );
return SUCCESS;
}
#endif
/*
* The default virtual method table for all WorkAreas.
*/
static const RDDFUNCS waTable =
{
/* Movement and positioning methods */
/* ( DBENTRYP_BP ) */ hb_waBof, /* Bof */
/* ( DBENTRYP_BP ) */ hb_waEof, /* Eof */
/* ( DBENTRYP_BP ) */ hb_waFound, /* Found */
( DBENTRYP_V ) hb_waUnsupported, /* GoBottom */
( DBENTRYP_UL ) hb_waUnsupported, /* GoTo */
( DBENTRYP_I ) hb_waUnsupported, /* GoToId */
( DBENTRYP_V ) hb_waUnsupported, /* GoTop */
( DBENTRYP_BIB ) hb_waUnsupported, /* Seek */
/* ( DBENTRYP_L ) */ hb_waSkip, /* Skip */
/* ( DBENTRYP_L ) */ hb_waSkipFilter, /* SkipFilter */
( DBENTRYP_L ) hb_waUnsupported, /* SkipRaw */
/* Data management */
/* ( DBENTRYP_VF ) */ hb_waAddField, /* AddField */
( DBENTRYP_B ) hb_waUnsupported, /* Append */
/* ( DBENTRYP_I ) */ hb_waCreateFields, /* CreateFields */
( DBENTRYP_V ) hb_waUnsupported, /* DeleteRec */
( DBENTRYP_BP ) hb_waUnsupported, /* Deleted */
/* ( DBENTRYP_SP ) */ hb_waFieldCount, /* FieldCount */
( DBENTRYP_VF ) hb_waUnsupported, /* FieldDisplay */
/* ( DBENTRYP_SSI ) */ hb_waFieldInfo, /* FieldInfo */
/* ( DBENTRYP_SVP ) */ hb_waFieldName, /* FieldName */
( DBENTRYP_V ) hb_waUnsupported, /* Flush */
( DBENTRYP_PP ) hb_waUnsupported, /* GetRec */
( DBENTRYP_SI ) hb_waUnsupported, /* GetValue */
( DBENTRYP_SVL ) hb_waUnsupported, /* GetVarLen */
( DBENTRYP_V ) hb_waUnsupported, /* GoCold */
( DBENTRYP_V ) hb_waUnsupported, /* GoHot */
( DBENTRYP_P ) hb_waUnsupported, /* PutRec */
( DBENTRYP_SI ) hb_waUnsupported, /* PutValue */
( DBENTRYP_V ) hb_waUnsupported, /* Recall */
( DBENTRYP_ULP ) hb_waUnsupported, /* RecCount */
( DBENTRYP_ISI ) hb_waUnsupported, /* RecInfo */
( DBENTRYP_ULP ) hb_waUnsupported, /* RecNo */
( DBENTRYP_I ) hb_waUnsupported, /* RecId */
/* ( DBENTRYP_S ) */ hb_waSetFieldExtent, /* SetFieldExtent */
/* WorkArea/Database management */
/* ( DBENTRYP_P ) */ hb_waAlias, /* Alias */
/* ( DBENTRYP_V ) */ hb_waClose, /* Close */
/* Like in Clipper map CREATE() method at work area level to OPEN() */
/* ( DBENTRYP_VP ) */ hb_waOpen, /* Create */
/* ( DBENTRYP_SI ) */ hb_waInfo, /* Info */
/* ( DBENTRYP_V ) */ hb_waNewArea, /* NewArea */
/* ( DBENTRYP_VP ) */ hb_waOpen, /* Open */
/* ( DBENTRYP_V ) */ hb_waRelease, /* Release */
/* ( DBENTRYP_SP ) */ hb_waStructSize, /* StructSize */
/* ( DBENTRYP_P ) */ hb_waSysName, /* SysName */
/* ( DBENTRYP_VEI ) */ hb_waEval, /* Eval */
( DBENTRYP_V ) hb_waUnsupported, /* Pack */
( DBENTRYP_LSP ) hb_waUnsupported, /* PackRec */
( DBENTRYP_VS ) hb_waUnsupported, /* Sort */
/* ( DBENTRYP_VT ) */ hb_waTrans, /* Trans */
/* ( DBENTRYP_VT ) */ hb_waTransRec, /* TransRec */
( DBENTRYP_V ) hb_waUnsupported, /* Zap */
/* Relational Methods */
/* ( DBENTRYP_VR ) */ hb_waChildEnd, /* ChildEnd */
/* ( DBENTRYP_VR ) */ hb_waChildStart, /* ChildStart */
( DBENTRYP_VR ) hb_waUnsupported, /* ChildSync */
/* ( DBENTRYP_V ) */ hb_waSyncChildren, /* SyncChildren */
/* ( DBENTRYP_V ) */ hb_waClearRel, /* ClearRel */
( DBENTRYP_V ) hb_waUnsupported, /* ForceRel */
/* ( DBENTRYP_SVP ) */ hb_waRelArea, /* RelArea */
/* ( DBENTRYP_VR ) */ hb_waRelEval, /* RelEval */
/* ( DBENTRYP_SI ) */ hb_waRelText, /* RelText */
/* ( DBENTRYP_VR ) */ hb_waSetRel, /* SetRel */
/* Order Management */
( DBENTRYP_OI ) hb_waUnsupported, /* OrderListAdd */
( DBENTRYP_V ) hb_waUnsupported, /* OrderListClear */
( DBENTRYP_OI ) hb_waUnsupported, /* OrderListDelete */
( DBENTRYP_OI ) hb_waUnsupported, /* OrderListFocus */
( DBENTRYP_V ) hb_waUnsupported, /* OrderListRebuild */
/* ( DBENTRYP_VOI ) */ hb_waOrderCondition, /* OrderCondition */
( DBENTRYP_VOC ) hb_waUnsupported, /* OrderCreate */
( DBENTRYP_OI ) hb_waUnsupported, /* OrderDestroy */
/* ( DBENTRYP_OII ) */ hb_waOrderInfo, /* OrderInfo */
/* Filters and Scope Settings */
/* ( DBENTRYP_V ) */ hb_waClearFilter, /* ClearFilter */
/* ( DBENTRYP_V ) */ hb_waClearLocate, /* ClearLocate */
( DBENTRYP_V ) hb_waUnsupported, /* ClearScope */
( DBENTRYP_VPLP ) hb_waUnsupported, /* CountScope */
/* ( DBENTRYP_I ) */ hb_waFilterText, /* FilterText */
( DBENTRYP_SI ) hb_waUnsupported, /* ScopeInfo */
/* ( DBENTRYP_VFI ) */ hb_waSetFilter, /* SetFilter */
/* ( DBENTRYP_VLO ) */ hb_waSetLocate, /* SetLocate */
( DBENTRYP_VOS ) hb_waUnsupported, /* SetScope */
( DBENTRYP_VPL ) hb_waUnsupported, /* SkipScope */
/* ( DBENTRYP_B ) */ hb_waLocate, /* Locate */
/* Miscellaneous */
/* ( DBENTRYP_P ) */ hb_waCompile, /* Compile */
/* ( DBENTRYP_I ) */ hb_waError, /* Error */
/* ( DBENTRYP_I ) */ hb_waEvalBlock, /* EvalBlock */
/* Network operations */
( DBENTRYP_VSP ) hb_waUnsupported, /* RawLock */
( DBENTRYP_VL ) hb_waUnsupported, /* Lock */
( DBENTRYP_I ) hb_waUnsupported, /* UnLock */
/* Memofile functions */
( DBENTRYP_V ) hb_waUnsupported, /* CloseMemFile */
( DBENTRYP_VP ) hb_waUnsupported, /* CreateMemFile */
( DBENTRYP_SVPB ) hb_waUnsupported, /* GetValueFile */
( DBENTRYP_VP ) hb_waUnsupported, /* OpenMemFile */
( DBENTRYP_SVPB ) hb_waUnsupported, /* PutValueFile */
/* Database file header handling */
( DBENTRYP_V ) hb_waUnsupported, /* ReadDBHeader */
( DBENTRYP_V ) hb_waUnsupported, /* WriteDBHeader */
/* non WorkArea functions */
( DBENTRYP_R ) NULL, /* Init */
( DBENTRYP_R ) NULL, /* Exit */
( DBENTRYP_RVVL ) hb_waRddUnsupported, /* Drop */
( DBENTRYP_RVVL ) hb_waRddUnsupported, /* Exists */
/* ( DBENTRYP_RSLV ) */ hb_waRddInfo, /* RddInfo */
/* Special and reserved methods */
( DBENTRYP_SVP ) hb_waUnsupported /* WhoCares */
};
#define HB_RDD_POOL_ALLOCSIZE 64
/* common for all threads list of registered RDDs */
static LPRDDNODE * s_RddList = NULL; /* Registered RDDs pool */
static USHORT s_uiRddMax = 0; /* Size of RDD pool */
static USHORT s_uiRddCount = 0; /* Number of registered RDD */
/*
* Get RDD node poionter
*/
HB_EXPORT LPRDDNODE hb_rddGetNode( USHORT uiNode )
{
HB_TRACE(HB_TR_DEBUG, ("hb_rddGetNode(%hu)", uiNode));
return uiNode < s_uiRddCount ? s_RddList[ uiNode ] : NULL;
}
HB_EXPORT PHB_ITEM hb_rddList( USHORT uiType )
{
USHORT uiCount, uiIndex, uiRdds;
PHB_ITEM pRddArray;
LPRDDNODE pNode;
HB_TRACE(HB_TR_DEBUG, ("hb_rddList(%hu)", uiType));
for( uiCount = uiRdds = 0; uiCount < s_uiRddCount; ++uiCount )
{
if( uiType == 0 || s_RddList[ uiCount ]->uiType == uiType )
++uiRdds;
}
pRddArray = hb_itemArrayNew( uiRdds );
for( uiCount = uiIndex = 0; uiCount < s_uiRddCount && uiIndex < uiRdds; ++uiCount )
{
pNode = s_RddList[ uiCount ];
if( uiType == 0 || pNode->uiType == uiType )
hb_arraySetC( pRddArray, ++uiIndex, pNode->szName );
}
return pRddArray;
}
/*
* Find a RDD node.
*/
HB_EXPORT LPRDDNODE hb_rddFindNode( const char * szDriver, USHORT * uiIndex )
{
USHORT uiCount;
HB_TRACE(HB_TR_DEBUG, ("hb_rddFindNode(%s, %p)", szDriver, uiIndex));
for( uiCount = 0; uiCount < s_uiRddCount; uiCount++ )
{
LPRDDNODE pNode = s_RddList[ uiCount ];
if( strcmp( pNode->szName, szDriver ) == 0 ) /* Matched RDD */
{
if( uiIndex )
* uiIndex = uiCount;
return pNode;
}
}
if( uiIndex )
* uiIndex = 0;
return NULL;
}
/*
* Shutdown the RDD system.
*/
HB_EXPORT void hb_rddShutDown( void )
{
USHORT uiCount;
HB_TRACE(HB_TR_DEBUG, ("hb_rddShutDown()"));
if( s_uiRddCount > 0 )
{
for( uiCount = 0; uiCount < s_uiRddCount; uiCount++ )
{
if( s_RddList[ uiCount ]->pTable.exit != NULL )
{
SELF_EXIT( s_RddList[ uiCount ] );
}
hb_xfree( s_RddList[ uiCount ] );
}
hb_xfree( s_RddList );
s_RddList = NULL;
s_uiRddMax = s_uiRddCount = 0;
}
}
/*
* Register a RDD driver.
*/
HB_EXPORT int hb_rddRegister( const char * szDriver, USHORT uiType )
{
LPRDDNODE pRddNewNode;
PHB_DYNS pGetFuncTable;
char szGetFuncTable[ HB_RDD_MAX_DRIVERNAME_LEN + 14 ];
USHORT uiFunctions;
HB_TRACE(HB_TR_DEBUG, ("hb_rddRegister(%s, %hu)", szDriver, uiType));
if( hb_rddFindNode( szDriver, NULL ) ) /* Duplicated RDD */
{
return 1;
}
snprintf( szGetFuncTable, sizeof( szGetFuncTable ), "%s_GETFUNCTABLE",
szDriver );
pGetFuncTable = hb_dynsymFindName( szGetFuncTable );
if( !pGetFuncTable )
{
return 2; /* Not valid RDD */
}
/* Create a new RDD node */
pRddNewNode = ( LPRDDNODE ) hb_xgrab( sizeof( RDDNODE ) );
memset( pRddNewNode, 0, sizeof( RDDNODE ) );
/* Fill the new RDD node */
hb_strncpy( pRddNewNode->szName, szDriver, sizeof( pRddNewNode->szName ) - 1 );
pRddNewNode->uiType = uiType;
pRddNewNode->rddID = s_uiRddCount;
/* Call <szDriver>_GETFUNCTABLE() */
hb_vmPushSymbol( hb_dynsymSymbol( pGetFuncTable ) );
hb_vmPushNil();
hb_vmPushPointer( ( void * ) &uiFunctions );
hb_vmPushPointer( ( void * ) &pRddNewNode->pTable );
hb_vmPushPointer( ( void * ) &pRddNewNode->pSuperTable );
hb_vmPushInteger( s_uiRddCount );
hb_vmDo( 4 );
if( hb_parni( -1 ) != SUCCESS )
{
hb_xfree( pRddNewNode ); /* Delete de new RDD node */
return 3; /* Invalid FUNCTABLE */
}
if( s_uiRddCount == s_uiRddMax )
{
s_uiRddMax += HB_RDD_POOL_ALLOCSIZE;
s_RddList = ( LPRDDNODE * ) hb_xrealloc( s_RddList,
sizeof( LPRDDNODE ) * s_uiRddMax );
}
s_RddList[ s_uiRddCount++ ] = pRddNewNode; /* Add the new RDD node */
if( pRddNewNode->pTable.init != NULL )
{
SELF_INIT( pRddNewNode );
}
return 0; /* Ok */
}
/*
* pTable - a table in new RDDNODE that will be filled
* pSubTable - a table with a list of supported functions
* pSuperTable - a current table in a RDDNODE
* szDrvName - a driver name that will be inherited
*/
HB_EXPORT ERRCODE hb_rddInherit( RDDFUNCS * pTable, const RDDFUNCS * pSubTable, RDDFUNCS * pSuperTable, const char * szDrvName )
{
LPRDDNODE pRddNode;
USHORT uiCount;
DBENTRYP_V * pFunction, * pSubFunction;
HB_TRACE(HB_TR_DEBUG, ("hb_rddInherit(%p, %p, %p, %s)", pTable, pSubTable, pSuperTable, szDrvName));
if( !pTable )
{
return FAILURE;
}
/* Copy the pSuperTable into pTable */
if( !szDrvName || ! *szDrvName )
{
/* no name for inherited driver - use the default one */
memcpy( pTable, &waTable, sizeof( RDDFUNCS ) );
memcpy( pSuperTable, &waTable, sizeof( RDDFUNCS ) );
}
else
{
char szSuperName[ HB_RDD_MAX_DRIVERNAME_LEN + 1 ];
hb_strncpyUpper( szSuperName, szDrvName, sizeof( szSuperName ) - 1 );
pRddNode = hb_rddFindNode( szSuperName, NULL );
if( !pRddNode )
{
return FAILURE;
}
memcpy( pTable, &pRddNode->pTable, sizeof( RDDFUNCS ) );
memcpy( pSuperTable, &pRddNode->pTable, sizeof( RDDFUNCS ) );
}
/* Copy the non NULL entries from pSubTable into pTable */
pFunction = ( DBENTRYP_V * ) pTable;
pSubFunction = ( DBENTRYP_V * ) pSubTable;
for( uiCount = 0; uiCount < RDDFUNCSCOUNT; uiCount++ )
{
if( * pSubFunction )
* pFunction = * pSubFunction;
pFunction ++;
pSubFunction ++;
}
return SUCCESS;
}
HB_FUNC_EXTERN( RDDSYS );
void _hb_rddWorkAreaForceLink( void )
{
HB_FUNC_EXEC( RDDSYS );
}
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