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9f16c2bf8e42e6a65d030e2671f6d1698a3bd86b
harbour-core/include/hbstack.h
Viktor Szakats 9f16c2bf8e 2017-08-13 18:27 UTC Viktor Szakats (vszakats users.noreply.github.com) 
* *
    * update copyright headers with new FSF postal address
    * COPYING.txt -> LICENSE.txt (rest of repo to be synced)
2017-08-13 18:38:59 +00:00

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/*
* The eval stack
*
* Copyright 1999 Antonio Linares <alinares@fivetech.com>
*
* 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 program; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
*
* 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.
*
*/
/* TOFIX: There are several things in this file which are not part of the
standard Harbour API, in other words these things are not
guaranteed to remain unchanged. To avoid confusion these should be
moved to somewhere else (like hbrtl.h). [vszakats] */
#ifndef HB_STACK_H_
#define HB_STACK_H_
#include "hbvmpub.h"
HB_EXTERN_BEGIN
#if defined( HB_MT_VM ) && defined( _HB_API_INTERNAL_ )
# include "hbthread.h"
#endif
/* thread specific data */
typedef void (*PHB_TSD_FUNC)(void *);
typedef struct
{
int iHandle;
int iSize;
PHB_TSD_FUNC pInitFunc;
PHB_TSD_FUNC pCleanFunc;
}
HB_TSD, * PHB_TSD;
#define HB_TSD_NEW(name,size,init,clean) \
HB_TSD name = { 0, size, init, clean }
#define HB_TSD_INIT(name,size,init,clean) do { \
(name)->iHandle = 0; \
(name)->iSize = (size); \
(name)->pInitFunc = (init); \
(name)->pCleanFunc = (clean); \
} while( 0 )
typedef struct
{
HB_ERRCODE uiFError;
HB_ERRCODE uiErrorLast;
HB_ERRCODE uiOsErrorLast;
HB_ERRCODE uiSocketError;
int iSocketOsError;
}
HB_IOERRORS, * PHB_IOERRORS;
typedef struct
{
const char * szDefaultRDD; /* default RDD */
HB_BOOL fNetError; /* current NetErr() flag */
void ** waList; /* Allocated WorkAreas */
HB_USHORT uiWaMax; /* Number of allocated WA */
HB_USHORT uiWaSpace; /* Number of allocated WA */
HB_USHORT * waNums; /* Allocated WorkAreas */
HB_USHORT uiWaNumMax; /* Number of allocated WA */
HB_USHORT uiCurrArea; /* Current WokrArea number */
void * pCurrArea; /* Current WorkArea pointer */
}
HB_STACKRDD, * PHB_STACKRDD;
#ifdef _HB_API_INTERNAL_
#include "hbset.h"
typedef struct
{
PHB_TSD pTSD;
void * value;
}
HB_TSD_HOLDER, * PHB_TSD_HOLDER;
typedef struct
{
PHB_DYNS pDynSym;
PHB_ITEM pPrevMemvar;
}
HB_PRIVATE_ITEM, * PHB_PRIVATE_ITEM;
typedef struct
{
PHB_PRIVATE_ITEM stack;
HB_SIZE size;
HB_SIZE count;
HB_SIZE base;
}
HB_PRIVATE_STACK, * PHB_PRIVATE_STACK;
#if defined( HB_MT_VM )
typedef struct
{
void * pMemvar; /* memvar pointer ( publics & privates ) */
HB_USHORT uiArea; /* Workarea number */
}
HB_DYN_HANDLES, * PHB_DYN_HANDLES;
#endif
/* stack managed by the virtual machine */
typedef struct
{
PHB_ITEM * pPos; /* pointer to the latest used item */
PHB_ITEM * pEnd; /* pointer to the end of stack items */
PHB_ITEM * pItems; /* pointer to the stack items */
PHB_ITEM * pBase; /* stack frame position for the current function call */
HB_ITEM Return; /* latest returned value */
HB_ISIZ nItems; /* total items that may be held on the stack */
HB_ISIZ nWithObject; /* stack offset to base current WITH OBJECT item */
HB_ISIZ nRecoverBase; /* current SEQUENCE envelope offset or 0 if no SEQUENCE is active */
HB_USHORT uiActionRequest;/* request for some action - stop processing of opcodes */
HB_USHORT uiQuitState; /* HVM is quiting */
HB_STACK_STATE state; /* first (default) stack state frame */
HB_STACKRDD rdd; /* RDD related data */
char szDate[ 9 ]; /* last returned date from hb_pards() YYYYMMDD format */
void * pCDP; /* current codepage module */
void * pLang; /* current language module */
void * pI18N; /* current I18N module */
void * hGT; /* current GT module */
int iTSD; /* number of allocated TSD holders */
PHB_TSD_HOLDER pTSD; /* thread specific data holder */
void * pStatics; /* statics base for the current function call */
HB_PRIVATE_STACK privates; /* private variables stack */
HB_SET_STRUCT set;
int iKeyPoll; /* counter for GT/keyboard polling */
HB_BOOL fDebugRequest; /* request debugger activation */
void * pDebugInfo; /* internal debugger structure */
#if defined( HB_MT_VM )
int iUnlocked; /* counter for nested hb_vmUnlock() calls */
PHB_DYN_HANDLES pDynH; /* dynamic symbol handles */
int iDynH; /* number of dynamic symbol handles */
void * pStackLst; /* this stack entry in stack linked list */
HB_IOERRORS IOErrors; /* MT safe buffer for IO errors */
HB_TRACEINFO traceInfo; /* MT safe buffer for HB_TRACE data */
char * pDirBuffer; /* MT safe buffer for hb_fsCurDir() results */
void * allocator; /* memory manager global struct pointer */
#endif
} HB_STACK, * PHB_STACK;
#if defined( _HB_STACK_MACROS_ )
# if defined( HB_MT_VM )
# if defined( HB_USE_TLS )
# if ! defined( _HB_STACK_LOCAL_MACROS_ )
# if defined( __BORLANDC__ )
extern PHB_STACK HB_TLS_ATTR hb_stack_ptr;
# else
extern HB_TLS_ATTR PHB_STACK hb_stack_ptr;
# endif
# endif
# else
# if ! defined( _HB_STACK_LOCAL_MACROS_ )
extern HB_TLS_KEY hb_stack_key;
# endif
# if defined( __BORLANDC__ ) && defined( HB_STACK_PRELOAD ) && \
! defined( HB_OS_WIN_64 ) && ! defined( HB_OS_WIN_CE ) && \
defined( HB_ASM_TLS )
# if defined( _HB_STACK_LOCAL_MACROS_ )
static HB_TLS_KEY hb_stack_key;
# endif
static __inline void * hb_stack_ptr_from_tls( void )
{
/* mov ecx,hb_stack_key */
_ECX = hb_stack_key;
/* mov eax,dword ptr fs:[00000018h] */
__emit__( 0x64, 0xA1, 0x18, 0x00, 0x00, 0x00 );
/* mov eax,[eax+ecx*4+00000E10h] */
__emit__( 0x8B, 0x84, 0x88, 0x10, 0x0E, 0x00, 0x00 );
/* ret (if function is not inlined) */
return (void*) _EAX;
}
# define hb_stack_ptr_get() hb_stack_ptr_from_tls()
# elif defined( __MINGW32__ ) && defined( HB_ASM_TLS ) && \
! defined( HB_OS_WIN_64 ) && ! defined( HB_OS_WIN_CE )
# if defined( _HB_STACK_LOCAL_MACROS_ )
static HB_TLS_KEY hb_stack_key;
# endif
static __inline__ __attribute__ ((pure, malloc)) void * hb_stack_ptr_from_tls( void )
{
void * p;
__asm__ (
"movl %%fs:(0x18), %0\n\t"
"movl 0x0e10(%0,%1,4), %0\n\t"
:"=a" (p)
:"c" (hb_stack_key)
);
return p;
}
# define hb_stack_ptr_get() hb_stack_ptr_from_tls()
# define hb_stack_ptr ( ( PHB_STACK ) hb_stack_ptr_from_tls() )
# endif
# if ! defined( hb_stack_ptr )
# define hb_stack_ptr ( ( PHB_STACK ) hb_tls_get( hb_stack_key ) )
# endif
# endif
# if defined( HB_STACK_PRELOAD ) && ! defined( HB_USE_TLS )
# if defined( hb_stack_ptr_get )
# define HB_STACK_TLS_RELOAD _hb_stack_ptr_ = ( PHB_STACK ) hb_stack_ptr_get();
# undef hb_stack_ptr
# else
# define HB_STACK_TLS_RELOAD _hb_stack_ptr_ = hb_stack_ptr;
# endif
# define HB_STACK_TLS_PRELOAD PHB_STACK HB_STACK_TLS_RELOAD
# define hb_stack ( * _hb_stack_ptr_ )
# define hb_stack_ref() ( _hb_stack_ptr_ )
# else
# define hb_stack ( * hb_stack_ptr )
# define hb_stack_ref() ( hb_stack_ptr )
# endif
# else
# if ! defined( _HB_STACK_LOCAL_MACROS_ )
extern HB_STACK hb_stack;
# endif
# define hb_stack_ref() ( &hb_stack )
# endif
#endif
#if ! defined( HB_STACK_TLS_PRELOAD )
# if defined( HB_STACK_PRELOAD )
# define HB_STACK_TLS_PRELOAD
# define HB_STACK_TLS_RELOAD
# undef HB_STACK_PRELOAD
# elif defined( _HB_STACK_MACROS_ )
# define HB_STACK_TLS_PRELOAD
# endif
#endif
#endif /* _HB_API_INTERNAL_ */
extern HB_EXPORT void * hb_stackId( void );
extern HB_EXPORT PHB_ITEM hb_stackItemFromTop( int nFromTop );
extern HB_EXPORT PHB_ITEM hb_stackItemFromBase( int nFromBase );
extern HB_EXPORT PHB_ITEM hb_stackBaseItem( void );
extern HB_EXPORT PHB_ITEM hb_stackSelfItem( void ); /* returns Self object at C function level */
extern HB_EXPORT PHB_ITEM hb_stackReturnItem( void ); /* returns RETURN Item from stack */
extern HB_EXPORT PHB_ITEM hb_stackAllocItem( void ); /* allocates new item on the top of stack, returns pointer to it */
extern HB_EXPORT void hb_stackPop( void ); /* pops an item from the stack */
extern HB_EXPORT void hb_stackPush( void ); /* pushes an item on to the stack */
extern void hb_stackPushReturn( void );
extern void hb_stackPopReturn( void );
extern HB_EXPORT HB_ISIZ hb_stackTopOffset( void );
extern HB_EXPORT HB_ISIZ hb_stackBaseOffset( void );
extern HB_EXPORT HB_ISIZ hb_stackTotalItems( void );
extern HB_EXPORT PHB_ITEM hb_stackItem( HB_ISIZ nItemPos );
/* stack management functions */
extern HB_EXPORT int hb_stackCallDepth( void );
extern HB_EXPORT void hb_stackBaseProcInfo( char * szProcName, HB_USHORT * puiProcLine ); /* get current .prg function name and line number */
extern HB_EXPORT HB_ISIZ hb_stackBaseProcOffset( int iLevel );
extern HB_EXPORT HB_ISIZ hb_stackBaseSymbolOffset( PHB_SYMB pSymbol );
extern void hb_stackDispCall( void );
/* thread specific data */
extern HB_EXPORT void * hb_stackGetTSD( PHB_TSD pTSD );
extern HB_EXPORT void * hb_stackTestTSD( PHB_TSD pTSD );
extern HB_EXPORT void hb_stackReleaseTSD( PHB_TSD pTSD );
extern char * hb_stackDateBuffer( void );
extern char * hb_stackDirBuffer( void );
extern PHB_IOERRORS hb_stackIOErrors( void );
extern void * hb_stackGetGT( void );
extern void hb_stackSetGT( void * );
extern PHB_STACKRDD hb_stackRDD( void );
extern HB_EXPORT void ** hb_stackDebugInfo( void );
#ifdef _HB_API_INTERNAL_
extern void hb_stackFree( void ); /* releases all memory used by the stack */
extern void hb_stackInit( void ); /* initializes the stack */
extern void hb_stackIncrease( void ); /* increase the stack size */
extern void hb_stackDec( void );
extern void hb_stackDecrease( HB_SIZE nItems );
extern void hb_stackRemove( HB_ISIZ nUntilPos );
extern PHB_ITEM hb_stackNewFrame( PHB_STACK_STATE pFrame, HB_USHORT uiParams );
extern void hb_stackOldFrame( PHB_STACK_STATE pFrame );
extern void hb_stackClearMemvarsBase( void );
extern PHB_ITEM hb_stackLocalVariable( int iLocal );
extern PHB_ITEM hb_stackLocalVariableAt( int * piFromBase );
extern PHB_ITEM ** hb_stackItemBasePtr( void );
extern HB_EXPORT HB_ISIZ hb_stackGetRecoverBase( void );
extern void hb_stackSetRecoverBase( HB_ISIZ nBase );
extern HB_USHORT hb_stackGetActionRequest( void );
extern void hb_stackSetActionRequest( HB_USHORT uiAction );
extern void hb_stackSetStaticsBase( void * pBase );
extern void * hb_stackGetStaticsBase( void );
extern PHB_ITEM hb_stackWithObjectItem( void );
extern HB_EXPORT HB_ISIZ hb_stackWithObjectOffset( void );
extern void hb_stackWithObjectSetOffset( HB_ISIZ nOffset );
extern int * hb_stackKeyPolls( void );
extern HB_BOOL * hb_stackDebugRequest( void );
extern void hb_stackDestroyTSD( void );
extern PHB_PRIVATE_STACK hb_stackGetPrivateStack( void );
extern void * hb_stackGetCDP( void );
extern void hb_stackSetCDP( void * );
extern void * hb_stackGetLang( void );
extern void hb_stackSetLang( void * );
extern void * hb_stackGetI18N( void );
extern void hb_stackSetI18N( void * );
extern void hb_stackIsStackRef( void *, PHB_TSD_FUNC );
extern void hb_stackUpdateAllocator( void *, PHB_ALLOCUPDT_FUNC, int );
#if defined( HB_MT_VM )
extern void * hb_stackList( void );
extern void hb_stackListSet( void * pStackLst );
extern void hb_stackIdSetActionRequest( void * pStackID, HB_USHORT uiAction );
extern PHB_DYN_HANDLES hb_stackGetDynHandle( PHB_DYNS pDynSym );
extern int hb_stackDynHandlesCount( void );
extern void hb_stackClearMemvars( int );
extern HB_BOOL hb_stackQuitState( void );
extern void hb_stackSetQuitState( HB_USHORT uiState );
extern int hb_stackUnlock( void );
extern int hb_stackLock( void );
extern int hb_stackLockCount( void );
extern void * hb_stackAllocator( void );
#endif
#endif /* _HB_API_INTERNAL_ */
#if defined( _HB_API_INTERNAL_ ) || defined( _HB_SET_INTERNAL_ )
extern PHB_SET_STRUCT hb_stackSetStruct( void );
#endif
#if defined( _HB_STACK_MACROS_ )
#define hb_stackItemFromTop( n ) ( * ( hb_stack.pPos + ( int ) ( n ) ) )
#define hb_stackItemFromBase( n ) ( * ( hb_stack.pBase + ( int ) ( n ) + 1 ) )
#define hb_stackTopOffset( ) ( hb_stack.pPos - hb_stack.pItems )
#define hb_stackBaseOffset( ) ( hb_stack.pBase - hb_stack.pItems + 1 )
/* #define hb_stackTotalItems( ) ( hb_stack.nItems ) */
#define hb_stackBaseItem( ) ( * hb_stack.pBase )
#define hb_stackSelfItem( ) ( * ( hb_stack.pBase + 1 ) )
#define hb_stackItem( iItemPos ) ( * ( hb_stack.pItems + ( HB_ISIZ ) ( iItemPos ) ) )
#define hb_stackReturnItem( ) ( &hb_stack.Return )
#define hb_stackDateBuffer( ) ( hb_stack.szDate )
#define hb_stackItemBasePtr( ) ( &hb_stack.pItems )
#define hb_stackGetStaticsBase( ) ( hb_stack.pStatics )
#define hb_stackSetStaticsBase( p ) do { hb_stack.pStatics = ( p ); } while( 0 )
#define hb_stackGetRecoverBase( ) ( hb_stack.nRecoverBase )
#define hb_stackSetRecoverBase( n ) do { hb_stack.nRecoverBase = ( n ); } while( 0 )
#define hb_stackGetActionRequest( ) ( hb_stack.uiActionRequest )
#define hb_stackSetActionRequest( n ) do { hb_stack.uiActionRequest = ( n ); } while( 0 )
#define hb_stackWithObjectItem( ) ( hb_stack.nWithObject ? * ( hb_stack.pItems + hb_stack.nWithObject ) : NULL )
#define hb_stackWithObjectOffset( ) ( hb_stack.nWithObject )
#define hb_stackWithObjectSetOffset( n ) do { hb_stack.nWithObject = ( n ); } while( 0 )
#define hb_stackGetCDP( ) ( hb_stack.pCDP )
#define hb_stackSetCDP( p ) do { hb_stack.pCDP = ( p ); } while( 0 )
#define hb_stackGetLang( ) ( hb_stack.pLang )
#define hb_stackSetLang( p ) do { hb_stack.pLang = ( p ); } while( 0 )
#define hb_stackGetI18N( ) ( hb_stack.pI18N )
#define hb_stackSetI18N( p ) do { hb_stack.pI18N = ( p ); } while( 0 )
#define hb_stackId( ) ( ( void * ) hb_stack_ref() )
#if defined( HB_MT_VM )
# define hb_stackList() ( hb_stack.pStackLst )
# define hb_stackListSet( p ) do { hb_stack.pStackLst = ( p ); } while( 0 )
# define hb_stackDynHandlesCount() ( hb_stack.iDynH )
# define hb_stackQuitState( ) ( hb_stack.uiQuitState != 0 )
# define hb_stackSetQuitState( n ) do { hb_stack.uiQuitState = ( n ); } while( 0 )
# define hb_stackUnlock() ( ++hb_stack.iUnlocked )
# define hb_stackLock() ( --hb_stack.iUnlocked )
# define hb_stackLockCount() ( hb_stack.iUnlocked )
#endif
#define hb_stackAllocItem( ) ( ( ++hb_stack.pPos == hb_stack.pEnd ? \
hb_stackIncrease() : ( void ) 0 ), \
* ( hb_stack.pPos - 1 ) )
#ifdef HB_STACK_SAFEMACROS
#define hb_stackDecrease( n ) do { \
if( ( hb_stack.pPos -= (n) ) <= hb_stack.pBase ) \
hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
} while( 0 )
#define hb_stackDec( ) do { \
if( --hb_stack.pPos <= hb_stack.pBase ) \
hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
} while( 0 )
#define hb_stackPop( ) do { \
if( --hb_stack.pPos <= hb_stack.pBase ) \
hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
if( HB_IS_COMPLEX( * hb_stack.pPos ) ) \
hb_itemClear( * hb_stack.pPos ); \
} while( 0 )
#define hb_stackPopReturn( ) do { \
if( HB_IS_COMPLEX( &hb_stack.Return ) ) \
hb_itemClear( &hb_stack.Return ); \
if( --hb_stack.pPos <= hb_stack.pBase ) \
hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
hb_itemRawMove( &hb_stack.Return, * hb_stack.pPos ); \
} while( 0 )
#else
#define hb_stackDecrease( n ) do { hb_stack.pPos -= (n); } while( 0 )
#define hb_stackDec( ) do { --hb_stack.pPos; } while( 0 )
#define hb_stackPop( ) do { --hb_stack.pPos; \
if( HB_IS_COMPLEX( * hb_stack.pPos ) ) \
hb_itemClear( * hb_stack.pPos ); \
} while( 0 )
#define hb_stackPopReturn( ) do { \
if( HB_IS_COMPLEX( &hb_stack.Return ) ) \
hb_itemClear( &hb_stack.Return ); \
--hb_stack.pPos; \
hb_itemRawMove( &hb_stack.Return, * hb_stack.pPos ); \
} while( 0 )
#endif /* HB_STACK_SAFEMACROS */
#define hb_stackPush( ) do { \
if( ++hb_stack.pPos == hb_stack.pEnd ) \
hb_stackIncrease(); \
} while( 0 )
#define hb_stackPushReturn( ) do { \
hb_itemRawMove( * hb_stack.pPos, &hb_stack.Return ); \
if( ++hb_stack.pPos == hb_stack.pEnd ) \
hb_stackIncrease(); \
} while( 0 )
#define hb_stackLocalVariable( i ) ( hb_stack.pBase[ ( i ) + 1 + \
( ( ( *hb_stack.pBase )->item.asSymbol.paramcnt > \
( *hb_stack.pBase )->item.asSymbol.paramdeclcnt && \
( i ) > ( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) ? \
( * hb_stack.pBase )->item.asSymbol.paramcnt - \
( * hb_stack.pBase )->item.asSymbol.paramdeclcnt : 0 ) ] )
#define hb_stackLocalVariableAt( p )( ( ( ( *hb_stack.pBase )->item.asSymbol.paramcnt > \
( *hb_stack.pBase )->item.asSymbol.paramdeclcnt ) && \
( * (p) ) > ( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) ? \
( * ( hb_stack.pBase + ( int ) ( * (p) += \
( * hb_stack.pBase )->item.asSymbol.paramcnt - \
( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) + 1 ) ) : \
( * ( hb_stack.pBase + ( int ) ( * (p) ) + 1 ) ) )
#define hb_stackGetPrivateStack( ) ( &hb_stack.privates )
#define hb_stackSetStruct( ) ( &hb_stack.set )
#define hb_stackKeyPolls( ) ( &hb_stack.iKeyPoll )
#define hb_stackDebugRequest( ) ( &hb_stack.fDebugRequest )
#define hb_stackDebugInfo( ) ( &hb_stack.pDebugInfo )
#endif
HB_EXTERN_END
#endif /* HB_STACK_H_ */
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