mirror of https://github.com/mpv-player/mpv
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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/*
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* Semi-precise timer routines using CoreFoundation
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*
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* (C) 2003 Dan Christiansen
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*
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* Released into the public domain.
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/time.h>
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#include "../config.h"
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#ifdef MACOSX
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# include <CoreFoundation/CFRunLoop.h>
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#endif
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/* Rather than using CF timers, we simply store the absolute time
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* CFAbsoluteTime == double */
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static CFAbsoluteTime relative_time;
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int usec_sleep(int usec_delay)
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{
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CFRunLoopRunInMode(kCFRunLoopDefaultMode, usec_delay / 1000000.0, false);
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}
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// Returns current time in microseconds
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unsigned int GetTimer(){
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return (unsigned int)(CFAbsoluteTimeGetCurrent() * 1000000);
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}
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// Returns current time in milliseconds
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unsigned int GetTimerMS(){
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return (unsigned int)(CFAbsoluteTimeGetCurrent() * 1000);
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}
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// Returns time spent between now and last call in seconds
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float GetRelativeTime(){
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CFAbsoluteTime last_time = relative_time;
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relative_time = CFAbsoluteTimeGetCurrent();
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return (float)(relative_time - last_time);
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}
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// Initialize timer, must be called at least once at start
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void InitTimer(){
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GetRelativeTime();
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}
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#if 0
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int main() {
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int i;
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for (i = 0; i < 20; i++) {
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printf("CF relative time:\t%f\n", GetRelativeTime());
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usec_sleep(1000000);
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printf("usleep relative time:\t%f\n", GetRelativeTime());
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usleep(1000000);
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}
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}
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#endif
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