Merge pull request #1 from ToyB-Chan/v2

V2

.gitignore

@@ -50,3 +50,6 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+
+# Visual Studio
+.vs/

minimal_heap.h

@@ -1,110 +1,153 @@
-#pragma once
+/* Version 1.2 */
+
+#ifndef __MINIMAL_HEAP_H__
+#define __MINIMAL_HEAP_H__
 
 #include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
 
-#define USE_HEAP_STRUCTURE_CHECKSUM 1
-#define USE_CANARY_VALIDATION 1
-
-#define HEAP_CORRUPTION_TYPE_MEMORY_AREA_CHECKSUM_MISMATCH 0
-#define HEAP_CORRUPTION_TYPE_SEGMENT_CHECKSUM_MISMATCH 1
-#define HEAP_CORRUPTION_TYPE_FRONT_CANARY_MISMATCH 2
-#define HEAP_CORRUPTION_TYPE_REAR_CANARY_MISMATCH 3
-
-struct heap_stats
-{
-	size_t 				num_memory_areas;
-	size_t 				num_total_segments;
-	size_t 				num_total_occupied_segments;
-	size_t 				total_size;
-} typedef heap_stats;
-
-struct heap_memory_area
-{
-	size_t 				size;
-	size_t 				num_segments;
-	size_t 				num_occupied_segments;
-	heap_memory_area* 	next_area;
-	heap_memory_area* 	previous_area;
-
-#if USE_HEAP_STRUCTURE_CHECKSUM
-	uint32_t 			checksum;
+#ifndef MIHP_IMPLEMENTATION
+	#define MIHP_IMPLEMENTATION 0
 #endif
-} typedef heap_memory_area;
 
-struct heap_segment
-{
-	size_t 				size;
-	bool 				is_occupied;
+#define MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_NONE 0
+#define MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_MAGIC_NUMBER 1
+#define MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM 2
 
-	heap_segment* 		next_segment;
-	heap_segment* 		previous_segment;
-	heap_memory_area* 	encapsulating_memory_area;
-
-#if USE_HEAP_STRUCTURE_CHECKSUM
-	uint32_t 			checksum;
+/* Defines to be configured by the library user */
+#ifndef MIHP_HEAP_STRUCTURE_VALIDATION_TYPE
+	#define MIHP_HEAP_STRUCTURE_VALIDATION_TYPE MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM
 #endif
-} typedef heap_segment;
 
-struct heap_corruption_info
-{
-	uint8_t 			type;
-	void* 				ptr;
-	uint32_t 			expected_value;
-	uint32_t 			actual_value;
-} typedef heap_corruption_info;
+#ifndef MIHP_ASSERT
+	#define MIHP_ASSERT(Condition) while(1) { if (Condition) break; *(volatile char*)(0x0) = 0; }
+#endif
+
+#ifndef MIHP_HEAP_LOCK_TYPE
+	#define MIHP_HEAP_LOCK_TYPE bool // Does NOT have to be reentred safe
+	#define MIHP_LOCK_HEAP(LockVarPtr) { while (*(LockVarPtr)) {}; *(LockVarPtr) = true; }
+	#define MIHP_UNLOCK_HEAP(LockVarPtr) { *(LockVarPtr) = false; }
+#endif
+/* */
 
 /* Hooks to be implemented by the library user */
-void* platform_request_memory_area(size_t size);
-bool platform_free_memory_area(void* ptr, size_t size);
-uint8_t platform_get_required_memory_alingment();
-void platform_heap_corruption_detected(heap_corruption_info info);
+void* MIHP_PlatformRequestMemory(size_t size); // Alignment must at least be alignment of size_t
+bool MIHP_PlatformFreeMemory(void* ptr, size_t size);
+void MIHP_PlatformOnHeapCorruptionDetected(struct _MIHP_HeapCorruptionInfo info);
+/* */
 
-size_t config_minimal_memory_area_size();
-size_t config_minimal_amount_unoccupied_bytes();
-size_t config_minimal_amount_unoccupied_continuous_bytes();
-/* === */
+#define MIHP_HEAP_CORRUPTION_TYPE_MEMORY_AREA_CHECKSUM_MISMATCH 0
+#define MIHP_HEAP_CORRUPTION_TYPE_SEGMENT_CHECKSUM_MISMATCH 1
+#define MIHP_HEAP_CORRUPTION_TYPE_FRONT_CANARY_MISMATCH 2
+#define MIHP_HEAP_CORRUPTION_TYPE_REAR_CANARY_MISMATCH 3
 
-uint32_t fast_memory_hasher(const void* data, size_t size)
+typedef struct _MIHP_HeapConfig
 {
-	uint32_t hash = 2166136261U;
-	const unsigned char* bytes = (const unsigned char*)data;
-	for (size_t i = 0; i < size; i++)
+	size_t			AllocationAlignment;		// Must be power of two and at least sizeof(size_t)
+
+	size_t			MinimalMemoryAreaSize;		// Must be a multiple of AllocationAlingment
+	size_t			MaximalMemoryAreaSize;		// Must be a multiple of AllocationAlingment
+	
+	char			AllocationInitialValue;
+} MIHP_HeapConfig;
+
+typedef struct _MIHP_HeapStats
 {
-		hash ^= bytes[i];
-		hash *= 16777619U;
-	}
+	size_t 				NumMemoryAreas;
+	size_t 				NumTotalSegments;
+	size_t 				NumTotalOccupiedSegments;
+	size_t 				TotalSize;
+} MIHP_HeapStats;
 
-	return hash;
-}
-
-uint32_t generate_heap_memory_area_checksum(const heap_memory_area* area)
+// This structs size must be multiple of 8
+typedef struct _MIHP_HeapMemoryAreaHeader
 {
-	size_t checksum_size;
+	size_t 							AreaSize;
+	size_t 							NumSegments;
+	size_t 							NumOccupiedSegments;
+
+	struct _MIHP_HeapMemoryAreaHeader* 	NextArea;
+	struct _MIHP_HeapMemoryAreaHeader* 	PreviousArea;
+
+	struct _MIHP_Heap*					OwningHeap;
+	struct _MIHP_HeapSegmentHeader*		FirstSegment;
+
+
+	uint32_t 			Checksum; // Checksum must be the last member !
+} MIHP_HeapMemoryAreaHeader;
+
+// This structs size must be multiple of 8
+typedef struct _MIHP_HeapSegmentHeader
+{
+	size_t						SegmentSize;
+	size_t						OccupiedSize;
+
+	struct _MIHP_HeapSegmentHeader* 		NextSegment;
+	struct _MIHP_HeapSegmentHeader* 		PreviousSegment;
+	struct _MIHP_HeapMemoryAreaHeader* 		OwningMemoryArea;
+
+	char _padding0[16];
+
+	uint32_t 			Checksum; // Checksum must be the last member !
+
+} MIHP_HeapSegmentHeader;
+
+typedef struct _MIHP_HeapCorruptionInfo
+{
+	const struct _MIHP_Heap*	Heap;
+	uint8_t 						Type;
+	const void* 					Ptr;
+	uint32_t 						ExpectedValue;
+	uint32_t 						ActualValue;
+} MIHP_HeapCorruptionInfo;
+
+typedef struct _MIHP_Heap
+{
+	MIHP_HeapConfig Config;
+	MIHP_HeapStats Stats;
+	MIHP_HeapMemoryAreaHeader* FirstArea;
+	MIHP_HeapMemoryAreaHeader* LastSuccessfulAllocationArea;
+
+	MIHP_HEAP_LOCK_TYPE HeapLock;
+} MIHP_Heap;
+
+/* API Interface */
+MIHP_Heap* MIHP_CreateHeap(MIHP_HeapConfig config);
+bool MIHP_DestroyHeap(MIHP_Heap* heap, bool force);
+void* MIHP_Allocate(MIHP_Heap* heap, size_t size);
+void* MIHP_Realloc(MIHP_Heap* heap, void* ptr, size_t newSize);
+bool MIHP_Free(MIHP_Heap* heap, void* ptr);
+
+bool MIHP_IsPointerInHeap(MIHP_Heap* heap, void* ptr);
+size_t MIHP_GetPtrAllocationSize(MIHP_Heap* heap, void* ptr);
+void MIHP_ValidateHeap(MIHP_Heap* heap);
+/* */
+
+/* Internals */
+MIHP_HeapMemoryAreaHeader* MIHP_CreateHeapMemoryArea(MIHP_Heap* heap, size_t requestedSize);
+bool MIHP_DestroyHeapMemoryArea(MIHP_Heap* heap, MIHP_HeapMemoryAreaHeader* area);
+
+MIHP_HeapSegmentHeader* MIHP_InitializeHeapSegment(MIHP_HeapMemoryAreaHeader* area, void* segmentStart, size_t size);
+bool MIHP_UninitializeHeapSegment(MIHP_HeapSegmentHeader* segment);
+
+bool MIHP_SplitHeapSegment(MIHP_HeapSegmentHeader* sourceSegment, size_t newSegmentSize, MIHP_HeapSegmentHeader** outNewSegment);
+bool MIHP_MergeHeapSegments(MIHP_HeapSegmentHeader* sourceSegment, MIHP_HeapSegmentHeader* segmentToAbsorb);
+
+size_t MIHP_GetHeapAlignedSize(const MIHP_Heap* heap, size_t size);
+
+uint32_t MIHP_HashMemoryRegion(const void* data, size_t size);
+uint32_t MIHP_GenerateHeapMemoryAreaChecksum(const MIHP_HeapMemoryAreaHeader* area);
+uint32_t MIHP_GenerateHeapSegmentChecksum(const MIHP_HeapSegmentHeader* segment);
+
+void MIHP_ValidateHeapMemoryAreaHeader(const MIHP_Heap* heap, const MIHP_HeapMemoryAreaHeader* area);
+void MIHP_ValidateHeapSegmentHeader(const MIHP_Heap* heap, const MIHP_HeapSegmentHeader* segment);
+
+size_t MIHP_GetMinimalPayloadSize(const MIHP_Heap* heap);
+/* */
 
-#if USE_HEAP_STRUCTURE_CHECKSUM
-	checksum_size = sizeof(area->checksum);
-#else
-	checksum_size = 0;
 #endif
 
-	// Do not include the checksum itself into the new checksum
-	size_t size = sizeof(*area) - checksum_size; 
-	return fast_memory_hasher(area, size);
-}
-
-uint32_t generate_heap_segment_checksum(const heap_segment* segment)
-{
-	size_t checksum_size;
-
-#if USE_HEAP_STRUCTURE_CHECKSUM
-	checksum_size = sizeof(segment->checksum);
-#else
-	checksum_size = 0;
+#if MIHP_IMPLEMENTATION
+	#include "minimal_heap_implementation.inl"
 #endif
-
-	// Do not include the checksum itself into the new checksum
-	size_t size = sizeof(*segment) - checksum_size; 
-	return fast_memory_hasher(segment, size);
-}

minimal_heap_implementation.inl

@@ -0,0 +1,637 @@
+#define MIHP_MIN(A, B) (A) < (B) ? (A) : (B)
+#define MIHP_MAX(A, B) (A) > (B) ? (A) : (B)
+
+#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_Heap* MIHP_CreateHeap(MIHP_HeapConfig config)
+{
+	if (config.AllocationAlignment < sizeof(size_t))
+		return NULL;
+
+	if (!MIHP_IS_PO2(config.AllocationAlignment))
+		return NULL;
+
+	if (config.MinimalMemoryAreaSize % config.AllocationAlignment != 0)
+		return NULL;
+
+	if (config.MaximalMemoryAreaSize % config.AllocationAlignment != 0)
+		return NULL;
+
+	MIHP_Heap* heap = (MIHP_Heap*)MIHP_PlatformRequestMemory(sizeof(MIHP_Heap));
+	if (heap == NULL)
+		return NULL;
+
+	MIHP_MEMSET(heap, sizeof(MIHP_Heap), 0);
+
+	heap->Config = config;
+
+	heap->FirstArea = MIHP_CreateHeapMemoryArea(heap, config.MinimalMemoryAreaSize);
+	heap->LastSuccessfulAllocationArea = heap->FirstArea;
+	if (heap->FirstArea == NULL)
+	{
+		MIHP_PlatformFreeMemory(heap, sizeof(MIHP_Heap));
+		return NULL;
+	}
+
+	heap->FirstArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(heap->FirstArea);
+
+	return heap;
+}
+
+bool MIHP_DestroyHeap(MIHP_Heap* heap, bool force)
+{
+	if (heap == NULL)
+		return false;
+
+	if (!force && heap->Stats.NumTotalOccupiedSegments > 0)
+		return false;
+
+	MIHP_HeapMemoryAreaHeader* nextArea = heap->FirstArea;
+	while (nextArea)
+	{
+		MIHP_HeapMemoryAreaHeader* currentArea = nextArea;
+		MIHP_ValidateHeapMemoryAreaHeader(heap, currentArea);
+		nextArea = currentArea->NextArea;
+
+		MIHP_DestroyHeapMemoryArea(heap, currentArea);
+	}
+
+	MIHP_PlatformFreeMemory(heap, sizeof(MIHP_Heap));
+	return true;
+}
+
+void* MIHP_Allocate(MIHP_Heap* heap, size_t size)
+{
+	if (heap == NULL)
+		return NULL;
+
+	if (size == 0)
+		return NULL;
+
+	if (size > heap->Config.MaximalMemoryAreaSize)
+		return NULL;
+
+	MIHP_LOCK_HEAP(&heap->HeapLock);
+
+	bool triedLastAllocationArea = false;
+	MIHP_HeapMemoryAreaHeader* nextArea = heap->FirstArea;
+	while (nextArea)
+	{
+		MIHP_HeapMemoryAreaHeader* currentArea = NULL;
+
+		if (!triedLastAllocationArea)
+		{
+			currentArea = heap->LastSuccessfulAllocationArea;
+			triedLastAllocationArea = true;
+		}
+		else
+		{
+			currentArea = nextArea;
+			nextArea = currentArea->NextArea;
+		}
+
+		MIHP_ValidateHeapMemoryAreaHeader(heap, currentArea);
+		
+		if (currentArea->NumOccupiedSegments == currentArea->NumSegments)
+			continue;
+
+		MIHP_HeapSegmentHeader* nextSegment = currentArea->FirstSegment;
+		while (nextSegment)
+		{
+			MIHP_HeapSegmentHeader* currentSegment = nextSegment;
+			MIHP_ValidateHeapSegmentHeader(heap, currentSegment);
+			nextSegment = currentSegment->NextSegment;
+
+			if (currentSegment->OccupiedSize != 0)
+				continue;
+
+			size_t segmentHeaderSize = MIHP_GetHeapAlignedSize(heap, sizeof(MIHP_HeapSegmentHeader));
+			MIHP_HeapSegmentHeader* targetSegment = NULL;
+
+			if (currentSegment->SegmentSize >= 2 * segmentHeaderSize + size + MIHP_GetMinimalPayloadSize(heap))
+				MIHP_SplitHeapSegment(currentSegment, segmentHeaderSize + size, &targetSegment);
+			else if (currentSegment->SegmentSize >= segmentHeaderSize + size)
+				targetSegment = currentSegment;
+			else
+				continue;
+
+			targetSegment->OccupiedSize = size;
+			targetSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(targetSegment);
+
+			currentArea->NumOccupiedSegments++;
+			currentArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(currentArea);
+
+			heap->Stats.NumTotalOccupiedSegments++;
+			heap->LastSuccessfulAllocationArea = currentArea;
+
+			MIHP_UNLOCK_HEAP(&heap->HeapLock);
+
+			void* data = (char*)targetSegment + segmentHeaderSize;
+			MIHP_MEMSET(data, size, heap->Config.AllocationInitialValue);
+
+			return data;
+		}
+	}
+
+	size_t newAreaSize = heap->Stats.TotalSize;
+
+	while (newAreaSize < size)
+		newAreaSize = MIHP_MIN(heap->Config.MaximalMemoryAreaSize, newAreaSize * 2);
+
+	MIHP_HeapMemoryAreaHeader* newArea = MIHP_CreateHeapMemoryArea(heap, newAreaSize);
+	if (newArea == NULL)
+		return NULL;
+
+	newArea->NextArea = heap->FirstArea;
+	heap->FirstArea->PreviousArea = newArea;
+	heap->FirstArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(heap->FirstArea);
+
+	heap->FirstArea = newArea;
+	heap->LastSuccessfulAllocationArea = newArea;
+	newArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(newArea);
+
+	MIHP_UNLOCK_HEAP(&heap->HeapLock);
+	return MIHP_Allocate(heap, size);
+}
+
+void* MIHP_Realloc(MIHP_Heap* heap, void* ptr, size_t newSize)
+{
+	if (newSize == 0)
+	{
+		MIHP_Free(heap, ptr);
+		return NULL;
+	}
+
+	if (heap == NULL)
+		return NULL;
+
+	if (ptr == NULL)
+		return MIHP_Allocate(heap, newSize);
+
+	if (!MIHP_IsPointerInHeap(heap, ptr))
+		return NULL;
+
+	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);
+
+	if (newSize > segment->OccupiedSize)
+	{
+		size_t maxPayloadSize = segment->SegmentSize - segmentHeaderSize;
+		if (newSize <= maxPayloadSize)
+		{
+			MIHP_MEMSET((char*)ptr + segment->OccupiedSize, newSize - segment->OccupiedSize, heap->Config.AllocationInitialValue);
+			segment->OccupiedSize = newSize;
+			segment->Checksum = MIHP_GenerateHeapSegmentChecksum(segment);
+
+			MIHP_UNLOCK_HEAP(&heap->HeapLock);
+			return ptr;
+		}
+
+		if (segment->NextSegment && MIHP_MergeHeapSegments(segment, segment->NextSegment))
+		{
+			MIHP_UNLOCK_HEAP(&heap->HeapLock);
+			return MIHP_Realloc(heap, ptr, newSize);
+		}
+
+		MIHP_UNLOCK_HEAP(&heap->HeapLock);
+
+		void* newPtr = MIHP_Allocate(heap, newSize);
+		if (!newPtr)
+			return NULL;
+
+		for (size_t i = 0; i < segment->OccupiedSize; i++)
+			((char*)newPtr)[i] = ((char*)ptr)[i];
+
+		MIHP_Free(heap, ptr);
+		return newPtr;
+	}
+	else if (newSize < segment->OccupiedSize)
+	{
+		segment->OccupiedSize = newSize;
+		segment->Checksum = MIHP_GenerateHeapSegmentChecksum(segment);
+
+		size_t alignedNewSize = MIHP_GetHeapAlignedSize(heap, newSize);
+		if (segment->SegmentSize > 2 * segmentHeaderSize + alignedNewSize + MIHP_GetMinimalPayloadSize(heap))
+		{
+			size_t newSplitSegmentSize = segment->SegmentSize - segmentHeaderSize - alignedNewSize;
+
+			MIHP_HeapSegmentHeader* newSpittedSegment = NULL;
+			MIHP_SplitHeapSegment(segment, newSplitSegmentSize, &newSpittedSegment);
+			if (newSpittedSegment && newSpittedSegment->NextSegment)
+				MIHP_MergeHeapSegments(newSpittedSegment, newSpittedSegment->NextSegment);
+		}
+
+		MIHP_UNLOCK_HEAP(&heap->HeapLock);
+		return ptr;
+	}
+
+	MIHP_UNLOCK_HEAP(&heap->HeapLock);
+	return ptr;
+}
+
+bool MIHP_Free(MIHP_Heap* heap, void* ptr)
+{
+	if (heap == NULL)
+		return false;
+
+	if (ptr == NULL)
+		return false;
+
+	if (!MIHP_IsPointerInHeap(heap, ptr))
+		return false;
+
+	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);
+
+	MIHP_HeapMemoryAreaHeader* area = segment->OwningMemoryArea;
+	MIHP_ValidateHeapMemoryAreaHeader(heap, area);
+
+	segment->OccupiedSize = 0;
+	segment->Checksum = MIHP_GenerateHeapSegmentChecksum(segment);
+	
+	area->NumOccupiedSegments--;
+	area->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(area);
+
+	heap->Stats.NumTotalOccupiedSegments--;
+
+	if (area->NumOccupiedSegments == 0 && heap->Stats.NumMemoryAreas > 1)
+	{
+		MIHP_HeapMemoryAreaHeader* prevArea = area->PreviousArea;
+		MIHP_HeapMemoryAreaHeader* nextArea = area->NextArea;
+
+		if (MIHP_DestroyHeapMemoryArea(heap, area))
+		{
+			if (prevArea)
+			{
+				MIHP_ValidateHeapMemoryAreaHeader(heap, prevArea);
+				prevArea->NextArea = nextArea;
+				prevArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(prevArea);
+			}
+			else
+				heap->FirstArea = nextArea;
+
+			if (nextArea)
+			{
+				MIHP_ValidateHeapMemoryAreaHeader(heap, nextArea);
+				nextArea->PreviousArea = prevArea;
+				nextArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(nextArea);
+			}
+
+			MIHP_UNLOCK_HEAP(&heap->HeapLock);
+			return true;
+		}
+	}
+
+	if (segment->NextSegment)
+	{
+		MIHP_ValidateHeapSegmentHeader(heap, segment->NextSegment);
+		if (segment->NextSegment->OccupiedSize == 0)
+			MIHP_MergeHeapSegments(segment, segment->NextSegment);
+	}
+
+	if (segment->PreviousSegment)
+	{
+		MIHP_ValidateHeapSegmentHeader(heap, segment->PreviousSegment);
+		if (segment->PreviousSegment->OccupiedSize == 0)
+			MIHP_MergeHeapSegments(segment->PreviousSegment, segment);
+	}
+
+	MIHP_UNLOCK_HEAP(&heap->HeapLock);
+	return true;
+}
+
+bool MIHP_IsPointerInHeap(MIHP_Heap* heap, void* ptr)
+{
+	if (heap == NULL)
+		return false;
+
+	MIHP_LOCK_HEAP(&heap->HeapLock);
+
+	size_t searchingPtr = (size_t)ptr;
+
+	MIHP_HeapMemoryAreaHeader* nextArea = heap->FirstArea;
+	while (nextArea)
+	{
+		MIHP_HeapMemoryAreaHeader* currentArea = nextArea;
+		nextArea = currentArea->NextArea;
+		
+		size_t ptrMin = (size_t)currentArea;
+		size_t ptrMax = (size_t)currentArea + currentArea->AreaSize;
+
+		if (searchingPtr >= ptrMin && searchingPtr <= ptrMax)
+		{
+			MIHP_UNLOCK_HEAP(&heap->HeapLock);
+			return true;
+		}
+	}
+
+	MIHP_UNLOCK_HEAP(&heap->HeapLock);
+	return false;
+}
+
+size_t MIHP_GetPtrAllocationSize(MIHP_Heap* 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_Heap* heap)
+{
+	MIHP_HeapMemoryAreaHeader* nextArea = heap->FirstArea;
+	while (nextArea)
+	{
+		MIHP_HeapMemoryAreaHeader* currentArea = nextArea;
+		MIHP_ValidateHeapMemoryAreaHeader(heap, currentArea);
+		nextArea = currentArea->NextArea;
+
+		MIHP_HeapSegmentHeader* nextSegment = currentArea->FirstSegment;
+		while (nextSegment)
+		{
+			MIHP_HeapSegmentHeader* currentSegment = nextSegment;
+			MIHP_ValidateHeapSegmentHeader(heap, currentSegment);
+			nextSegment = currentSegment->NextSegment;
+		}
+	}
+}
+
+MIHP_HeapMemoryAreaHeader* MIHP_CreateHeapMemoryArea(MIHP_Heap* heap, size_t requestedSize)
+{
+	MIHP_ASSERT(heap);
+
+	size_t effectiveSize = ((requestedSize + heap->Config.MinimalMemoryAreaSize - 1) / heap->Config.MinimalMemoryAreaSize) * heap->Config.MinimalMemoryAreaSize;
+	effectiveSize = MIHP_MAX(effectiveSize, heap->Config.MinimalMemoryAreaSize);
+	effectiveSize = MIHP_MIN(effectiveSize, heap->Config.MaximalMemoryAreaSize);
+
+	MIHP_HeapMemoryAreaHeader* area = (MIHP_HeapMemoryAreaHeader*)MIHP_PlatformRequestMemory(effectiveSize);
+	if (area == NULL)
+		return NULL;
+
+	MIHP_MEMSET(area, sizeof(MIHP_HeapMemoryAreaHeader), 0);
+
+	area->AreaSize = effectiveSize;
+	area->OwningHeap = heap;
+	area->Checksum = ~0;
+
+	size_t headerSize = MIHP_GetHeapAlignedSize(heap, sizeof(MIHP_HeapMemoryAreaHeader));
+	area->FirstSegment = MIHP_InitializeHeapSegment(area, (char*)area + headerSize, area->AreaSize - headerSize);
+	area->FirstSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(area->FirstSegment);
+
+	heap->Stats.NumMemoryAreas++;
+	heap->Stats.TotalSize += effectiveSize;
+
+	return area;
+}
+
+bool MIHP_DestroyHeapMemoryArea(MIHP_Heap* heap, MIHP_HeapMemoryAreaHeader* memoryArea)
+{
+	MIHP_ASSERT(heap);
+	MIHP_ASSERT(memoryArea);
+
+	size_t areaNumSegments = memoryArea->NumSegments;
+	size_t areaNumOccupiedSegments = memoryArea->NumOccupiedSegments;
+	size_t areaSize = memoryArea->AreaSize;
+
+	if (!MIHP_PlatformFreeMemory(memoryArea, memoryArea->AreaSize))
+		return false;
+
+	heap->Stats.NumTotalSegments -= areaNumSegments;
+	heap->Stats.NumTotalOccupiedSegments -= areaNumOccupiedSegments;
+	heap->Stats.NumMemoryAreas--;
+	heap->Stats.TotalSize -= areaSize;
+
+	return true;
+}
+
+MIHP_HeapSegmentHeader* MIHP_InitializeHeapSegment(MIHP_HeapMemoryAreaHeader* area, void* segmentStart, size_t segmentSize)
+{
+	MIHP_ASSERT(area);
+	MIHP_ASSERT(segmentStart);
+
+	MIHP_HeapSegmentHeader* segment = (MIHP_HeapSegmentHeader*)segmentStart;
+
+	MIHP_MEMSET(segment, sizeof(MIHP_HeapSegmentHeader), 0);
+
+	segment->SegmentSize = segmentSize;
+	segment->OwningMemoryArea = area;
+	segment->Checksum = ~0;
+
+	area->NumSegments++;
+	area->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(area);
+
+	area->OwningHeap->Stats.NumTotalSegments++;
+
+	return segment;
+}
+
+bool MIHP_UninitializeHeapSegment(MIHP_HeapSegmentHeader* segment)
+{
+	MIHP_ASSERT(segment);
+
+	if (segment->OccupiedSize > 0)
+		return false;
+
+	segment->OwningMemoryArea->NumSegments--;
+	segment->OwningMemoryArea->Checksum = MIHP_GenerateHeapMemoryAreaChecksum(segment->OwningMemoryArea);
+	segment->OwningMemoryArea->OwningHeap->Stats.NumTotalSegments--;
+
+	MIHP_MEMSET(segment, sizeof(MIHP_HeapSegmentHeader), 0);
+
+	return true;
+}
+
+bool MIHP_SplitHeapSegment(MIHP_HeapSegmentHeader* sourceSegment, size_t newSegmentMinSize, MIHP_HeapSegmentHeader** outNewSegment)
+{
+	MIHP_ASSERT(sourceSegment);
+
+	size_t headerSize = MIHP_GetHeapAlignedSize(sourceSegment->OwningMemoryArea->OwningHeap, sizeof(MIHP_HeapSegmentHeader));
+	size_t effectiveNewSegmentSize = MIHP_GetHeapAlignedSize(sourceSegment->OwningMemoryArea->OwningHeap, newSegmentMinSize);
+
+	if (sourceSegment->SegmentSize < effectiveNewSegmentSize)
+		return false;
+
+	size_t sourceResultingSegmentSize = sourceSegment->SegmentSize - effectiveNewSegmentSize;
+
+	if (sourceResultingSegmentSize < sourceSegment->OccupiedSize + headerSize)
+		return false;
+
+	sourceSegment->SegmentSize = sourceResultingSegmentSize;
+
+	MIHP_HeapSegmentHeader* newSegment = MIHP_InitializeHeapSegment(sourceSegment->OwningMemoryArea, (char*)sourceSegment + sourceResultingSegmentSize, effectiveNewSegmentSize);
+	newSegment->NextSegment = sourceSegment->NextSegment;
+	newSegment->PreviousSegment = sourceSegment;
+
+	if (sourceSegment->NextSegment)
+	{
+		MIHP_ValidateHeapSegmentHeader(sourceSegment->OwningMemoryArea->OwningHeap, sourceSegment->NextSegment);
+		sourceSegment->NextSegment->PreviousSegment = newSegment;
+		sourceSegment->NextSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(sourceSegment->NextSegment);
+	}
+
+	sourceSegment->NextSegment = newSegment;
+
+	if (outNewSegment)
+		*outNewSegment = newSegment;
+
+	newSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(newSegment);
+	sourceSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(sourceSegment);
+
+	return true;
+}
+
+bool MIHP_MergeHeapSegments(MIHP_HeapSegmentHeader* sourceSegment, MIHP_HeapSegmentHeader* segmentToAbsorb)
+{
+	MIHP_ASSERT(sourceSegment);
+	MIHP_ASSERT(segmentToAbsorb);
+	MIHP_ASSERT(sourceSegment->NextSegment == segmentToAbsorb);
+
+	if (segmentToAbsorb->OccupiedSize > 0)
+		return false;
+
+	sourceSegment->NextSegment = segmentToAbsorb->NextSegment;
+
+	if (sourceSegment->NextSegment)
+	{
+		MIHP_ValidateHeapSegmentHeader(sourceSegment->OwningMemoryArea->OwningHeap, sourceSegment->NextSegment);
+		sourceSegment->NextSegment->PreviousSegment = sourceSegment;
+		sourceSegment->NextSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(sourceSegment->NextSegment);
+	}
+
+	sourceSegment->SegmentSize += segmentToAbsorb->SegmentSize;
+	MIHP_UninitializeHeapSegment(segmentToAbsorb);
+
+	sourceSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(sourceSegment);
+
+	return true;
+}
+
+size_t MIHP_GetHeapAlignedSize(const MIHP_Heap* heap, size_t size)
+{
+	return (size + (heap->Config.AllocationAlignment - 1)) & ~(heap->Config.AllocationAlignment - 1);
+}
+
+uint32_t MIHP_HashMemoryRegion(const void* data, size_t size)
+{
+	uint32_t hash = 2166136261U;
+	const unsigned char* bytes = (const unsigned char*)data;
+	for (size_t i = 0; i < size; i++)
+	{
+		hash ^= bytes[i];
+		hash *= 16777619U;
+	}
+
+	return hash;
+}
+
+uint32_t MIHP_GenerateHeapMemoryAreaChecksum(const MIHP_HeapMemoryAreaHeader* area)
+{
+
+#if MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_NONE
+	return 0;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_MAGIC_NUMBER
+	return 0xAADEADAA;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM
+
+	MIHP_ASSERT(area);
+
+	// Do not include the checksum itself into the new checksum
+	size_t size = offsetof(MIHP_HeapMemoryAreaHeader, Checksum);
+	return MIHP_HashMemoryRegion(area, size);
+
+#else
+	#error "Invalid heap structure validation type"
+#endif
+}
+
+uint32_t MIHP_GenerateHeapSegmentChecksum(const MIHP_HeapSegmentHeader* segment)
+{
+#if MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_NONE
+	return 0;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_MAGIC_NUMBER
+	return 0x55DEAD55;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM
+
+	MIHP_ASSERT(segment);
+
+	// Do not include the checksum itself into the new checksum
+	size_t size = offsetof(MIHP_HeapSegmentHeader, Checksum);
+	return MIHP_HashMemoryRegion(segment, size);
+
+#else
+	#error "Invalid heap structure validation type"
+#endif
+}
+
+void MIHP_ValidateHeapMemoryAreaHeader(const MIHP_Heap* heap, const MIHP_HeapMemoryAreaHeader* area)
+{
+	uint32_t newChecksum;
+
+#if MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_NONE
+	return;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_MAGIC_NUMBER
+	newChecksum = 0xAADEADAA;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM
+	newChecksum = MIHP_GenerateHeapMemoryAreaChecksum(area);
+#else
+	#error "Invalid heap structure validation type"
+#endif
+
+	if (area->Checksum != newChecksum)
+	{
+		MIHP_HeapCorruptionInfo corruptionInfo;
+		corruptionInfo.Heap = heap;
+		corruptionInfo.Type = MIHP_HEAP_CORRUPTION_TYPE_MEMORY_AREA_CHECKSUM_MISMATCH;
+		corruptionInfo.Ptr = area;
+		corruptionInfo.ExpectedValue = area->Checksum;
+		corruptionInfo.ActualValue = newChecksum;
+
+		MIHP_PlatformOnHeapCorruptionDetected(corruptionInfo);
+	}
+}
+
+void MIHP_ValidateHeapSegmentHeader(const MIHP_Heap* heap, const MIHP_HeapSegmentHeader* segment)
+{
+	uint32_t newChecksum;
+
+#if MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_NONE
+	return;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_MAGIC_NUMBER
+	newChecksum = 0x55DEAD55;
+#elif MIHP_HEAP_STRUCTURE_VALIDATION_TYPE == MIHP_HEAP_STRUCTURE_VALIDATION_TYPE_CHECKSUM
+	newChecksum = MIHP_GenerateHeapSegmentChecksum(segment);
+#else
+	#error "Invalid heap structure validation type"
+#endif
+
+	if (segment->Checksum != newChecksum)
+	{
+		MIHP_HeapCorruptionInfo corruptionInfo;
+		corruptionInfo.Heap = heap;
+		corruptionInfo.Type = MIHP_HEAP_CORRUPTION_TYPE_SEGMENT_CHECKSUM_MISMATCH;
+		corruptionInfo.Ptr = segment;
+		corruptionInfo.ExpectedValue = segment->Checksum;
+		corruptionInfo.ActualValue = newChecksum;
+
+		MIHP_PlatformOnHeapCorruptionDetected(corruptionInfo);
+	}
+}
+
+size_t MIHP_GetMinimalPayloadSize(const MIHP_Heap* heap)
+{
+	return heap->Config.AllocationAlignment;
+}

minimal_heap_test.c

@@ -0,0 +1,108 @@
+#define MIHP_IMPLEMENTATION 1
+#include "minimal_heap.h"
+
+#include <stdlib.h>
+#include <time.h>
+#include <stdio.h>
+
+#define USE_MALLOC 0
+
+//#define MIHP_ValidateHeap()
+
+void* MIHP_PlatformRequestMemory(size_t size)
+{
+	return malloc(size);
+}
+
+bool MIHP_PlatformFreeMemory(void* ptr, size_t size)
+{
+	free(ptr);
+	return true;
+}
+
+void MIHP_PlatformOnHeapCorruptionDetected(MIHP_HeapCorruptionInfo info)
+{
+	__debugbreak();
+}
+
+#define NUM_ALLOCATIONS (4096 * 4)
+
+void* myptrs[NUM_ALLOCATIONS] = { 0 };
+
+int main()
+{
+	MIHP_HeapConfig config = {0};
+	config.AllocationInitialValue = 0xbe;
+	config.AllocationAlignment = 16;
+	config.MinimalMemoryAreaSize = 4096 * 32;
+	config.MaximalMemoryAreaSize = 4096ull * 4096ull * 4096ull;
+	MIHP_Heap* myHeap = MIHP_CreateHeap(config);
+
+	for (int i = 0; i < NUM_ALLOCATIONS; i++)
+	{
+		size_t size = 473 + (i % 5 == 0 ? 854 : 0);
+#if USE_MALLOC
+		myptrs[i] = malloc(size);
+#else
+		myptrs[i] = MIHP_Allocate(myHeap, size);
+		MIHP_ValidateHeap(myHeap);
+#endif
+	}
+
+	__debugbreak();
+
+	for (int i = 0; i < NUM_ALLOCATIONS; i++)
+	{
+		if (rand() % 3 == 0)
+		{
+#if USE_MALLOC
+			free(myptrs[i]);
+#else
+			MIHP_Free(myHeap, myptrs[i]);
+			MIHP_ValidateHeap(myHeap);
+#endif
+
+			myptrs[i] = NULL;
+		}
+	}
+
+	__debugbreak();
+
+	for (int i = 0; i < NUM_ALLOCATIONS; i++)
+	{
+		volatile int n = i;
+		if (myptrs[i])
+		{
+			size_t size = 300 + rand() % 500;
+
+#if USE_MALLOC
+			myptrs[i] = realloc(myptrs[i], size);
+#else
+			myptrs[i] = MIHP_Realloc(myHeap, myptrs[i], size);
+			MIHP_ValidateHeap(myHeap);
+
+			
+#endif
+		}
+	}
+
+	__debugbreak();
+	
+	for (int z = 15; z >= 0; z--)
+		for (int y = 0; y < NUM_ALLOCATIONS / 16; y++)
+		{
+			int i = z + y * 16;
+#if USE_MALLOC
+			free(myptrs[i]);
+#else
+			MIHP_Free(myHeap, myptrs[i]);
+			MIHP_ValidateHeap(myHeap);
+#endif
+
+			myptrs[i] = NULL;
+		}
+
+
+	__debugbreak();
+}
+

minimal_heap_test.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36717.8 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "minimal_heap_test", "minimal_heap_test.vcxproj", "{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Debug|x64.ActiveCfg = Debug|x64
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Debug|x64.Build.0 = Debug|x64
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Debug|x86.ActiveCfg = Debug|Win32
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Debug|x86.Build.0 = Debug|Win32
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Release|x64.ActiveCfg = Release|x64
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Release|x64.Build.0 = Release|x64
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Release|x86.ActiveCfg = Release|Win32
+		{58F662F6-EAAC-4D4B-A2F5-C25ED48A05F7}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4273B178-AE5C-4FCB-99D3-ACA9EE4C7E80}
+	EndGlobalSection
+EndGlobal

minimal_heap_test.vcxproj

@@ -0,0 +1,138 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>17.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{58f662f6-eaac-4d4b-a2f5-c25ed48a05f7}</ProjectGuid>
+    <RootNamespace>minimalheaptest</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard_C>stdc17</LanguageStandard_C>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="minimal_heap_test.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="minimal_heap.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="minimal_heap_implementation.inl" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

minimal_heap_test.vcxproj.filters

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Quelldateien">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Headerdateien">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Ressourcendateien">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="minimal_heap_test.c">
+      <Filter>Quelldateien</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="minimal_heap.h">
+      <Filter>Headerdateien</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="minimal_heap_implementation.inl">
+      <Filter>Headerdateien</Filter>
+    </None>
+  </ItemGroup>
+</Project>

minimal_heap_test.vcxproj.user

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <ShowAllFiles>true</ShowAllFiles>
+  </PropertyGroup>
+</Project>