toybchan/minimal-heap
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fixed some bugs

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toybchan
2026-06-11 05:27:06 +02:00
parent 4dc806403f
commit ef9ec5de2a
3 changed files with 16 additions and 14 deletions
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8
minimal_heap.h
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@@ -17,7 +17,7 @@
#endif
#ifndef MIHP_MEMSET
#define MIHP_MEMSET(Ptr, Size, Val) for(size_t i = 0; i < Size; ++i) *((char*)Ptr + i) = Val;
#define MIHP_MEMSET(Ptr, Size, Val) do { for(size_t i = 0; i < Size; ++i) *((char*)Ptr + i) = Val; } while(0);
#endif
/* */
@@ -62,7 +62,7 @@ typedef struct _MIHP_HeapConfig
void* HeapLock; // Does not need to be reentred safe, can be NULL to disable locking
MIHP_LockHeapFn* LockHeapFn; // Can be NULL if HeapLock is NULL
MIHP_LockHeapFn* UnlockHeapFn; // Can be NULL if HeapLock is NULL
MIHP_UnlockHeapFn* UnlockHeapFn; // Can be NULL if HeapLock is NULL
} MIHP_HeapConfig;
typedef struct _MIHP_HeapStats
@@ -73,7 +73,6 @@ typedef struct _MIHP_HeapStats
size_t TotalSize;
} MIHP_HeapStats;
// This structs size must be multiple of 8
typedef struct _MIHP_HeapMemoryAreaHeader
{
size_t AreaSize;
@@ -86,6 +85,7 @@ typedef struct _MIHP_HeapMemoryAreaHeader
struct _MIHP_HeapSegmentHeader* FirstSegment;
struct _MIHP_HeapSegmentHeader* LastSuccessfulAllocationSegment;
// TODO: Change this to an InstigatingHeapUuid (opaque ptr)
const struct _MIHP_Heap* InstigatingHeap; // Heap that created this area. May not always be the owning heap (in case of a merge) or safe to deference!
uint32_t Checksum; // Checksum must be the last member !
@@ -96,7 +96,6 @@ typedef struct _MIHP_AllocationCustomMetadata
uint8_t data[16];
} MIHP_AllocationCustomMetadata;
// This structs size must be multiple of 8
typedef struct _MIHP_HeapSegmentHeader
{
size_t SegmentSize;
@@ -109,7 +108,6 @@ typedef struct _MIHP_HeapSegmentHeader
struct _MIHP_AllocationCustomMetadata CustomMetadata;
uint32_t Checksum; // Checksum must be the last member !
} MIHP_HeapSegmentHeader;
typedef struct _MIHP_HeapCorruptionInfo

10
minimal_heap_implementation.inl
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@@ -1,5 +1,5 @@
#define MIHP_MIN(A, B) (A) < (B) ? (A) : (B)
#define MIHP_MAX(A, B) (A) > (B) ? (A) : (B)
#define MIHP_MIN(A, B) ((A) < (B) ? (A) : (B))
#define MIHP_MAX(A, B) ((A) > (B) ? (A) : (B))
#define MIHP_IS_PO2(Val) (Val != 0 && (Val & (Val - 1)) == 0)
@@ -66,6 +66,9 @@ bool MIHP_InitializeHeap(MIHP_Heap* heap, MIHP_HeapConfig config)
heap->Config = config;
heap->FirstArea = MIHP_CreateHeapMemoryArea(heap, config.MinMemoryAreaSize);
if (heap->FirstArea == NULL)
return false;
heap->LastSuccessfulAllocationArea = heap->FirstArea;
heap->FirstArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(heap, heap->FirstArea);
@@ -315,6 +318,8 @@ bool MIHP_Free(MIHP_Heap* heap, void* ptr)
if (heap->Config.OnHeapCorruptionDetectedFn != NULL)
heap->Config.OnHeapCorruptionDetectedFn(heap, corruptionInfo);
MIHP_UnlockHeap(heap);
return false;
}
@@ -494,6 +499,7 @@ size_t MIHP_GetPtrAllocationSize(MIHP_Heap* heap, void* ptr)
MIHP_HeapSegmentHeader* segment = (MIHP_HeapSegmentHeader*)((char*)ptr - segmentHeaderSize);
MIHP_ValidateHeapSegmentHeader(heap, segment);
MIHP_UnlockHeap(heap);
return segment->OccupiedSize;
}

2
minimal_heap_test.c
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@@ -74,8 +74,6 @@ int main()
memcpy(&returnPtr, &outMetadata.data, sizeof(void*));
MIHP_ASSERT(ptr == returnPtr);
__debugbreak();
#endif
}