159 lines
4.7 KiB
C
159 lines
4.7 KiB
C
/*
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* $Id$
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*/
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/*
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Harbour Project source code
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The Fixed Memory API
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Copyright 1999 Antonio Linares <alinares@fivetech.com>
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www - http://www.harbour-project.org
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version, with one exception:
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The exception is that if you link the Harbour Runtime Library (HRL)
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and/or the Harbour Virtual Machine (HVM) with other files to produce
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an executable, this does not by itself cause the resulting executable
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to be covered by the GNU General Public License. Your use of that
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executable is in no way restricted on account of linking the HRL
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and/or HVM code into it.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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their web site at http://www.gnu.org/).
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*/
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/* NOTE: If you turn this on, the memory subsystem will collect information
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about several statistical data about memory management, it will show
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these on exit if memory seem to have leaked.
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This should be normally turned off in a final release */
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#define HB_FM_STATISTICS
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#ifndef __MPW__
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#include <malloc.h>
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#endif
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#include "extend.h"
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#include "errorapi.h"
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#ifdef HB_FM_STATISTICS
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static ULONG s_ulMemoryBlocks = 0; /* memory blocks used */
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static ULONG s_ulMemoryMaxBlocks = 0; /* maximum number of used memory blocks */
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static ULONG s_ulMemoryMaxConsumed = 0; /* memory size consumed */
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static ULONG s_ulMemoryConsumed = 0; /* memory max size consumed */
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#endif
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void * hb_xalloc( ULONG ulSize ) /* allocates fixed memory, returns NULL on failure */
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{
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void * pMem = malloc( ulSize + sizeof( ULONG ) );
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if( ! pMem )
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{
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return pMem;
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}
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* ( ( ULONG * ) pMem ) = ulSize; /* we store the block size into it */
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#ifdef HB_FM_STATISTICS
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s_ulMemoryConsumed += ulSize;
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s_ulMemoryMaxConsumed += ulSize;
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s_ulMemoryBlocks++;
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s_ulMemoryMaxBlocks++;
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#endif
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return ( char * ) pMem + sizeof( ULONG );
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}
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void * hb_xgrab( ULONG ulSize ) /* allocates fixed memory, exits on failure */
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{
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void * pMem = malloc( ulSize + sizeof( ULONG ) );
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if( ! pMem )
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{
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hb_errInternal( 9999, "hb_xgrab can't allocate memory", NULL, NULL );
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}
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* ( ( ULONG * ) pMem ) = ulSize; /* we store the block size into it */
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#ifdef HB_FM_STATISTICS
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s_ulMemoryConsumed += ulSize;
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s_ulMemoryMaxConsumed += ulSize;
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s_ulMemoryBlocks++;
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s_ulMemoryMaxBlocks++;
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#endif
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return ( char * ) pMem + sizeof( ULONG );
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}
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void * hb_xrealloc( void * pMem, ULONG ulSize ) /* reallocates memory */
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{
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ULONG ulMemSize = * ( ULONG * ) ( ( char * ) pMem - sizeof( ULONG ) );
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void * pResult = realloc( ( char * ) pMem - sizeof( ULONG ), ulSize + sizeof( ULONG ) );
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if( ! pResult )
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{
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hb_errInternal( 9999, "hb_xrealloc can't reallocate memory", NULL, NULL );
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}
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* ( ( ULONG * ) pResult ) = ulSize; /* we store the block size into it */
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#ifdef HB_FM_STATISTICS
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if( ! ulSize )
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s_ulMemoryBlocks--;
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s_ulMemoryConsumed += ( ulSize - ulMemSize );
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if( ulSize > ulMemSize )
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s_ulMemoryMaxConsumed += ulSize - ulMemSize;
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#endif
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return ( char * ) pResult + sizeof( ULONG );
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}
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void hb_xfree( void * pMem ) /* frees fixed memory */
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{
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ULONG ulMemSize = * ( ULONG * ) ( ( char * ) pMem - sizeof( ULONG ) );
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if( pMem )
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free( ( char * ) pMem - sizeof( ULONG ) );
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else
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hb_errInternal( 9999, "hb_xfree called with a null pointer", NULL, NULL );
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#ifdef HB_FM_STATISTICS
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s_ulMemoryConsumed -= ulMemSize;
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s_ulMemoryBlocks--;
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#endif
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}
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ULONG hb_xsize( void * pMem ) /* returns the size of an allocated memory block */
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{
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return * ( ULONG * ) ( ( char * ) pMem - sizeof( ULONG ) );
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}
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void hb_xinit( void ) /* Initialize fixed memory subsystem */
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{
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;
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}
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void hb_xexit( void ) /* Deinitialize fixed memory subsystem */
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{
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#ifdef HB_FM_STATISTICS
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if( s_ulMemoryBlocks )
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{
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printf( "\n\ntotal memory blocks allocated: %lu\n", s_ulMemoryMaxBlocks );
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printf( "memory maximum size consumed: %ld\n", s_ulMemoryMaxConsumed );
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printf( "memory blocks not released: %ld\n", s_ulMemoryBlocks );
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printf( "memory size not released: %ld\n", s_ulMemoryConsumed );
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}
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#endif
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}
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