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Change system_allocator to store size of blocks only for debugging

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Storing the size of the blocks is now only activated when DEBUG__MEMFILL
has been defined.
This commit is contained in:
Nicolas Léveillé 2015-08-16 09:15:20 +02:00
parent d9ae097533
commit e74e23d672
1 changed files with 6 additions and 2 deletions
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8
src/system_allocator.c
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@ -6,6 +6,7 @@
// with this byte: // with this byte:
// #define DEBUG__MEMFILL 0xFF // #define DEBUG__MEMFILL 0xFF
#if defined(DEBUG__MEMFILL)
/** /**
* Blocks allocated by the system_allocator start with this header. * Blocks allocated by the system_allocator start with this header.
* I.e. the user part of the allocation directly follows. * I.e. the user part of the allocation directly follows.
@ -16,6 +17,9 @@ typedef struct HDebugBlockHeader_
} HDebugBlockHeader; } HDebugBlockHeader;
#define BLOCK_HEADER_SIZE (sizeof(HDebugBlockHeader)) #define BLOCK_HEADER_SIZE (sizeof(HDebugBlockHeader))
#else
#define BLOCK_HEADER_SIZE (0)
#endif
/** /**
* Compute the total size needed for a given allocation size. * Compute the total size needed for a given allocation size.
@ -46,8 +50,8 @@ static void* system_alloc(HAllocator *allocator, size_t size) {
void *uptr = user_ptr(block); void *uptr = user_ptr(block);
#ifdef DEBUG__MEMFILL #ifdef DEBUG__MEMFILL
memset(uptr, DEBUG__MEMFILL, size); memset(uptr, DEBUG__MEMFILL, size);
#endif
((HDebugBlockHeader*)block)->size = size; ((HDebugBlockHeader*)block)->size = size;
#endif
return uptr; return uptr;
} }
@ -65,8 +69,8 @@ static void* system_realloc(HAllocator *allocator, void* uptr, size_t size) {
size_t old_size = ((HDebugBlockHeader*)block)->size; size_t old_size = ((HDebugBlockHeader*)block)->size;
if (size > old_size) if (size > old_size)
memset((char*)uptr+old_size, DEBUG__MEMFILL, size - old_size); memset((char*)uptr+old_size, DEBUG__MEMFILL, size - old_size);
#endif
((HDebugBlockHeader*)block)->size = size; ((HDebugBlockHeader*)block)->size = size;
#endif
return uptr; return uptr;
} }