ref: 271106133a2e3e3e434f21fb81a3599381fd047f
dir: /config/ansi/memdebug.c/
/***************************************************************************/
/* */
/* memdebug.c */
/* */
/* Memory debugging functions (body only). */
/* */
/* Copyright 1996-1999 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used */
/* modified and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
typedef struct TBlockRec_
{
char* base;
long size;
} TBlockRec;
static TBlockRec* mem_blocks;
static int num_mem_blocks;
static int max_mem_blocks;
void DM_Init_Mem()
{
num_mem_blocks = 0;
max_mem_blocks = 4096;
mem_blocks = (TBlockRec*)malloc( max_mem_blocks *
sizeof ( *mem_blocks ) );
}
void DM_Done_Mem()
{
/* Now print the remaining blocks */
if ( num_mem_blocks == 0 )
{
fprintf( stderr, "No memory leaked!\n" );
}
else
{
int i;
fprintf( stderr, "There were %d leaked memory blocks\n\n",
num_mem_blocks );
fprintf( stderr, "base size\n" );
fprintf( stderr, "------------------\n" );
for ( i = 0; i < num_mem_blocks; i++ )
{
fprintf( stderr, "%08lx %04lx\n",
(long)mem_blocks[i].base, mem_blocks[i].size );
}
}
free( mem_blocks );
}
void DM_Record( char* base,
long size )
{
TBlockRec* block;
#if 0
/* First, check that the block is not located within one of the */
/* recorded blocks */
for ( i = 0; i < num_mem_blocks; i++ )
{
char *start, *end, *_limit, *_base;
_base = mem_blocks[i].base;
_limit = _base + mem_blocks[i].size;
start = base;
end = base + size - 1;
if ( ( start >= base && start < limit ) ||
( end >= base && end < limit ) )
{
fprintf( stderr, "Warning: Recording an invalid block!\n" );
}
}
#endif
/* Add block to list */
if ( num_mem_blocks >= max_mem_blocks )
{
max_mem_blocks *= 2;
mem_blocks = realloc( mem_blocks,
max_mem_blocks * sizeof ( *mem_blocks ) );
}
block = mem_blocks + num_mem_blocks;
block->base = base;
block->size = size;
num_mem_blocks++;
}
void DM_Forget( char* base )
{
TBlockRec* block = mem_blocks;
int i;
for ( i = 0; i < num_mem_blocks; i++, block++ )
{
if ( block->base == base )
{
/* simply move last block to the current position */
if ( num_mem_blocks > 1 )
*block = mem_blocks[num_mem_blocks - 1];
num_mem_blocks--;
return;
}
#if 1
if ( base >= block->base && base < block->base + block->size )
{
fprintf( stderr, "Invalid block forgotten!\n" );
}
#endif
}
}
/* END */