https://learn.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualfree The windows version of free()
BOOL VirtualFree(
[in] LPVOID lpAddress,
[in] SIZE_T dwSize,
[in] DWORD dwFreeType
);returns whether successful or not. it fails if there is a semaphore on the memory location