toybchan/minimal-heap
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toybchan
2026-06-08 07:24:17 +02:00
parent 0da008fec7
commit b50b2548ab
3 changed files with 82 additions and 32 deletions
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22
minimal_heap.c
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@@ -5,8 +5,16 @@
#define MIHP_MEMSET(Ptr, Size, Val) for(size_t i = 0; i < Size; ++i) *((char*)Ptr + i) = Val;
#define MIHP_IS_PO2(Val) (Val != 0 && (Val & (Val - 1)) == 0)
MIHP_HeapInfo* MIHP_CreateHeap(MIHP_HeapConfig config)
{
if (config.AllocationAlignment < sizeof(size_t))
return NULL;
if (!MIHP_IS_PO2(config.AllocationAlignment))
return NULL;
MIHP_HeapInfo* heap = (MIHP_HeapInfo*)MIHP_PlatformRequestMemory(sizeof(MIHP_HeapInfo));
if (heap == NULL)
return NULL;
@@ -238,6 +246,20 @@ bool MIHP_IsPointerInHeap(MIHP_HeapInfo* heap, void* ptr)
return false;
}
size_t MIHP_GetPtrAllocationSize(MIHP_HeapInfo* heap, void* ptr)
{
if (!MIHP_IsPointerInHeap(heap, ptr))
return 0;
MIHP_LOCK_HEAP(&heap->HeapLock);
size_t segmentHeaderSize = MIHP_GetHeapAlignedSize(heap, sizeof(MIHP_HeapSegmentHeader));
MIHP_HeapSegmentHeader* segment = (MIHP_HeapSegmentHeader*)((char*)ptr - segmentHeaderSize);
MIHP_ValidateHeapSegmentHeader(heap, segment);
return segment->OccupiedSize;
}
void MIHP_ValidateHeap(MIHP_HeapInfo* heap)
{
MIHP_HeapMemoryAreaHeader* nextArea = heap->FirstArea;