void * AllocateImpl ( SIZE_T Size, uint32 CachedByteLimit, [FFreePageBlock](API\Runtime\Core\HAL\Allocators\FCachedOSPageAllocator\FFreePageBlock) * First, [FFreePageBlock](API\Runtime\Core\HAL\Allocators\FCachedOSPageAllocator\FFreePageBlock) * Last, uint32 & FreedPageBlocksNum, SIZE_T & CachedTotal, FCriticalSection * Mutex )