mirror of https://github.com/mpv-player/mpv
41 lines
1000 B
C
41 lines
1000 B
C
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/* POSIX compatible timer callback */
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#include <sys/time.h>
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#include <signal.h>
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#include <stddef.h>
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#include "timer.h"
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static timer_callback *user_func = NULL;
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static struct itimerval otimer;
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static void (*old_alrm)(int) = SIG_DFL;
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static void my_alarm_handler( int signo )
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{
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if(user_func) (*user_func)();
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}
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unsigned set_timer_callback(unsigned ms,timer_callback func)
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{
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unsigned ret;
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struct itimerval itimer;
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user_func = func;
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getitimer(ITIMER_REAL,&otimer);
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old_alrm = signal(SIGALRM,my_alarm_handler);
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signal(SIGALRM,my_alarm_handler);
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itimer.it_interval.tv_sec = 0;
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itimer.it_interval.tv_usec = ms*1000;
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itimer.it_value.tv_sec = 0;
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itimer.it_value.tv_usec = ms*1000;
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setitimer(ITIMER_REAL,&itimer,NULL);
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getitimer(ITIMER_REAL,&itimer);
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ret = itimer.it_interval.tv_sec*1000 + itimer.it_interval.tv_usec/1000;
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if(!ret) restore_timer();
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return ret;
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}
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void restore_timer(void)
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{
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signal(SIGALRM,old_alrm);
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setitimer(ITIMER_REAL,&otimer,NULL);
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}
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