Function region_alloc

TheForceEngine/TFE_Memory/memoryRegion.cpp:234–284

	}

	void* region_alloc(MemoryRegion* region, u64 size)
	{
		assert(region);
		if (size == 0) { return nullptr; }

		size = alloc_align(size + sizeof(RegionAllocHeader));
		assert(size >= 24);	// at least 24 bytes is required to hold the free header.
		if (size > region->blockSize) { return nullptr; }
		
		for (s32 i = 0; i < region->blockCount; i++)
		{
			MemoryBlock* block = region->memBlocks[i];
			if (block->sizeFree < size)
			{
				continue;
			}

			// Try to allocate from the closest matching bin.
			s32 bin = getBinFromSize((u32)size);
			for (s32 b = bin; b < ALLOC_BIN_COUNT; b++)
			{
				AllocHeaderFree* header = block->freeListBins[b];
				while (header)
				{
					if (header->size >= size)
					{
						VERIFY_MEMORY();
						void* mem = allocFromHeader(block, (RegionAllocHeader*)header, (u32)size);
						VERIFY_MEMORY();
						return mem;
					}
					header = header->binNext;
				}
			}
		}

		if (!region->maxBlocks || region->blockCount < region->maxBlocks)
		{
			if (allocateNewBlock(region))
			{
				VERIFY_MEMORY();
				void* mem = region_alloc(region, size);
				VERIFY_MEMORY();
				return mem;
			}
		}
		
		// We are all out of memory...
		TFE_System::logWrite(LOG_ERROR, "MemoryRegion", "Failed to allocate %u bytes in region '%s'.", size, region->name);
		return nullptr;
	}

	void* region_realloc(MemoryRegion* region, void* ptr, u64 size)
	{