Function I_WaitVBL

source/common/utility/i_time.cpp:110–118

}

void I_WaitVBL(int count)
{
	// I_WaitVBL is never used to actually synchronize to the vertical blank.
	// Instead, it's used for delay purposes. Doom used a 70 Hz display mode,
	// so that's what we use to determine how long to wait for.

	std::this_thread::sleep_for(std::chrono::milliseconds(1000 * count / 70));
	I_SetFrameTime();
}

int I_WaitForTic(int prevtic, double const ticrate)
{