toybchan/minimal-heap
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Merge branch 'main' of https://github.com/ToyB-Chan/minimal-heap

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toybchan
2026-06-08 20:34:34 +02:00
parent 468378e88e 05343eb3cd
commit 3c46dfa855
3 changed files with 37 additions and 19 deletions
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34
minimal_heap_implementation.inl
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@@ -19,19 +19,22 @@ MIHP_Heap* MIHP_CreateHeap(MIHP_HeapConfig config)
if (config.MaximalMemoryAreaSize % config.AllocationAlignment != 0)
return NULL;
MIHP_Heap* heap = (MIHP_Heap*)MIHP_PlatformRequestMemory(sizeof(MIHP_Heap));
size_t actualHeapStructAllocSize = 0;
MIHP_Heap* heap = (MIHP_Heap*)MIHP_PlatformRequestMemory(sizeof(MIHP_Heap), &actualHeapStructAllocSize);
if (heap == NULL)
return NULL;
MIHP_ASSERT(actualHeapStructAllocSize >= sizeof(MIHP_Heap));
MIHP_MEMSET(heap, sizeof(MIHP_Heap), 0);
heap->Config = config;
heap->FirstArea = MIHP_CreateHeapMemoryArea(heap, config.MinimalMemoryAreaSize);
heap->HeapStructureAllocationSize = actualHeapStructAllocSize;
heap->FirstArea = MIHP_CreateHeapMemoryArea(heap, actualHeapStructAllocSize);
heap->LastSuccessfulAllocationArea = heap->FirstArea;
if (heap->FirstArea == NULL)
{
MIHP_PlatformFreeMemory(heap, sizeof(MIHP_Heap));
MIHP_PlatformFreeMemory(heap, heap->HeapStructureAllocationSize);
return NULL;
}
@@ -58,7 +61,7 @@ bool MIHP_DestroyHeap(MIHP_Heap* heap, bool force)
MIHP_DestroyHeapMemoryArea(heap, currentArea);
}
MIHP_PlatformFreeMemory(heap, sizeof(MIHP_Heap));
MIHP_PlatformFreeMemory(heap, heap->HeapStructureAllocationSize);
return true;
}
@@ -254,6 +257,17 @@ bool MIHP_Free(MIHP_Heap* heap, void* ptr)
MIHP_HeapMemoryAreaHeader* area = segment->OwningMemoryArea;
MIHP_ValidateHeapMemoryAreaHeader(heap, area);
if (segment->OccupiedSize == 0)
{
MIHP_HeapCorruptionInfo corruptionInfo = {0};
corruptionInfo.Heap = heap;
corruptionInfo.Type = MIHP_HEAP_CORRUPTION_TYPE_DOUBLE_FREE;
corruptionInfo.Ptr = ptr;
MIHP_PlatformOnHeapCorruptionDetected(corruptionInfo);
return false;
}
segment->OccupiedSize = 0;
segment->Checksum = MIHP_GenerateHeapSegmentChecksum(segment);
@@ -378,13 +392,15 @@ MIHP_HeapMemoryAreaHeader* MIHP_CreateHeapMemoryArea(MIHP_Heap* heap, size_t req
effectiveSize = MIHP_MAX(effectiveSize, heap->Config.MinimalMemoryAreaSize);
effectiveSize = MIHP_MIN(effectiveSize, heap->Config.MaximalMemoryAreaSize);
MIHP_HeapMemoryAreaHeader* area = (MIHP_HeapMemoryAreaHeader*)MIHP_PlatformRequestMemory(effectiveSize);
size_t actualSize = 0;
MIHP_HeapMemoryAreaHeader* area = (MIHP_HeapMemoryAreaHeader*)MIHP_PlatformRequestMemory(effectiveSize, &actualSize);
if (area == NULL)
return NULL;
MIHP_ASSERT(actualSize >= effectiveSize);
MIHP_MEMSET(area, sizeof(MIHP_HeapMemoryAreaHeader), 0);
area->AreaSize = effectiveSize;
area->AreaSize = actualSize;
area->OwningHeap = heap;
area->Checksum = ~0;
@@ -393,7 +409,7 @@ MIHP_HeapMemoryAreaHeader* MIHP_CreateHeapMemoryArea(MIHP_Heap* heap, size_t req
area->FirstSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(area->FirstSegment);
heap->Stats.NumMemoryAreas++;
heap->Stats.TotalSize += effectiveSize;
heap->Stats.TotalSize += area->AreaSize;
return area;
}
@@ -455,7 +471,7 @@ bool MIHP_UninitializeHeapSegment(MIHP_HeapSegmentHeader* segment)
return true;
}
bool MIHP_SplitHeapSegment(MIHP_HeapSegmentHeader* sourceSegment, size_t newSegmentMinSize, MIHP_HeapSegmentHeader** outNewSegment)
bool MIHP_SplitHeapSegment(MIHP_HeapSegmentHeader* sourceSegment, size_t newSegmentMinSize, MIHP_HeapSegmentHeader** optOutNewSegment)
{
MIHP_ASSERT(sourceSegment);