toybchan/minimal-heap
1
0
Fork 0
mirror of https://github.com/ToyB-Chan/minimal-heap.git synced 2026-07-13 21:51:16 +02:00
Code Issues Packages Projects Releases Wiki Activity

platform can now properly return larger amounts of memory as requested

Browse Source
This commit is contained in:
toybchan
2026-06-08 20:29:45 +02:00
parent 57ce5af8e6
commit d0e6bccafe
3 changed files with 26 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
minimal_heap_implementation.inl
View File

@@ -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;
}
@@ -389,13 +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;
@@ -404,7 +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;
}
@@ -466,7 +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);
@@ -496,8 +501,8 @@ bool MIHP_SplitHeapSegment(MIHP_HeapSegmentHeader* sourceSegment, size_t newSegm
sourceSegment->NextSegment = newSegment;
if (outNewSegment)
*outNewSegment = newSegment;
if (optOutNewSegment)
*optOutNewSegment = newSegment;
newSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(newSegment);
sourceSegment->Checksum = MIHP_GenerateHeapSegmentChecksum(sourceSegment);