void Sys_ThrottleFPS(int max_fps) {
static int throttler_ready = 0;
static double end_of_prev_frame;
double frame_time, current_time, time_to_wait;
struct timespec ts = { 0 };
if (throttler_ready) {
frame_time = 1000.0/max_fps;
do {
current_time = Sys_GetTicks();
time_to_wait = frame_time - (current_time - end_of_prev_frame);
if (time_to_wait > 0) {
ts.tv_sec = 0;
ts.tv_nsec = (long)(time_to_wait*1000000.0);
nanosleep(&ts, NULL);
}
} while (0);
} else {
throttler_ready = 1;
}
end_of_prev_frame = Sys_GetTicks();
}
ProfileBlockScoped::~ProfileBlockScoped()
{
uint64 diff = Sys_GetTicks() - mStartTime;
uint64 us = Sys_TicksToMicrosecond(diff);
DebugPrintf("Block '%s' : %.3fms", mBlockName.c_str(), (float)us / 1000.0f);
}
ProfileBlockScoped::ProfileBlockScoped(std::string blockName)
{
mBlockName = blockName;
mStartTime = Sys_GetTicks();
}