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[Core] Align base arena memory to 64 byte cache line

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Nic Barker 2025-06-17 10:32:30 +10:00
parent 6f10bf4b3d
commit b9e27178c0
1 changed files with 7 additions and 6 deletions
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13
clay.h
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@ -1284,15 +1284,12 @@ struct Clay_Context {
Clay_Context* Clay__Context_Allocate_Arena(Clay_Arena *arena) { Clay_Context* Clay__Context_Allocate_Arena(Clay_Arena *arena) {
size_t totalSizeBytes = sizeof(Clay_Context); size_t totalSizeBytes = sizeof(Clay_Context);
uintptr_t memoryAddress = (uintptr_t)arena->memory; if (totalSizeBytes > arena->capacity)
// Make sure the memory address passed in for clay to use is cache line aligned
uintptr_t nextAllocOffset = (memoryAddress % 64);
if (nextAllocOffset + totalSizeBytes > arena->capacity)
{ {
return NULL; return NULL;
} }
arena->nextAllocation = nextAllocOffset + totalSizeBytes; arena->nextAllocation += totalSizeBytes;
return (Clay_Context*)(memoryAddress + nextAllocOffset); return (Clay_Context*)(arena->memory);
} }
Clay_String Clay__WriteStringToCharBuffer(Clay__charArray *buffer, Clay_String string) { Clay_String Clay__WriteStringToCharBuffer(Clay__charArray *buffer, Clay_String string) {
@ -3990,6 +3987,10 @@ void Clay_SetPointerState(Clay_Vector2 position, bool isPointerDown) {
CLAY_WASM_EXPORT("Clay_Initialize") CLAY_WASM_EXPORT("Clay_Initialize")
Clay_Context* Clay_Initialize(Clay_Arena arena, Clay_Dimensions layoutDimensions, Clay_ErrorHandler errorHandler) { Clay_Context* Clay_Initialize(Clay_Arena arena, Clay_Dimensions layoutDimensions, Clay_ErrorHandler errorHandler) {
// Cacheline align memory passed in
uintptr_t baseOffset = 64 - ((uintptr_t)arena.memory % 64);
baseOffset = baseOffset == 64 ? 0 : baseOffset;
arena.memory += baseOffset;
Clay_Context *context = Clay__Context_Allocate_Arena(&arena); Clay_Context *context = Clay__Context_Allocate_Arena(&arena);
if (context == NULL) return NULL; if (context == NULL) return NULL;
// DEFAULTS // DEFAULTS