Function copy

3rdparty/bgfx/src/bgfx.cpp:4177–4183

	}

	const Memory* copy(const void* _data, uint32_t _size)
	{
		BX_ASSERT(0 < _size, "Invalid memory operation. _size is 0.");
		const Memory* mem = alloc(_size);
		bx::memCopy(mem->data, _data, _size);
		return mem;
	}

	struct MemoryRef
	{