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Implemented realloc(). 

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28454 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2008-11-02 02:59:15 +00:00
parent 2ef4a8b524
commit f68fa9d364
1 changed files with 29 additions and 8 deletions
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25
src/system/runtime_loader/heap.cpp
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@ -237,10 +237,31 @@ dump_chunks(void)
void *
realloc(void *buffer, size_t newSize)
realloc(void *allocation, size_t newSize)
{
// not implemented
// free, if new size is 0
if (newSize == 0) {
free(allocation);
return NULL;
}
// just malloc(), if no previous allocation
if (allocation == NULL)
return malloc(newSize);
// we're lazy and don't shrink allocations
free_chunk* chunk = free_chunk::SetToAllocated(allocation);
if (chunk->Size() >= newSize)
return allocation;
// the allocation needs to grow -- allocate a new one and memcpy()
void* newAllocation = malloc(newSize);
if (newAllocation != NULL) {
memcpy(newAllocation, allocation, chunk->Size());
free(allocation);
}
return newAllocation;
}