From cb7768f9bb35b55ae27835525cc6effe19ad099f Mon Sep 17 00:00:00 2001 From: nick Date: Mon, 25 Feb 2002 14:24:11 +0000 Subject: POSIX compatible timer's callback git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4864 b3059339-0415-0410-9bf9-f77b7e298cf2 --- linux/timer.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 linux/timer.c (limited to 'linux/timer.c') diff --git a/linux/timer.c b/linux/timer.c new file mode 100644 index 0000000000..306db9c40b --- /dev/null +++ b/linux/timer.c @@ -0,0 +1,40 @@ +/* POSIX compatible timer callback */ +#include +#include +#include + +#include "timer.h" + +static timer_callback *user_func = NULL; +static struct itimerval otimer; +static void (*old_alrm)(int) = SIG_DFL; + +static void my_alarm_handler( int signo ) +{ + if(user_func) (*user_func)(); +} + +unsigned set_timer_callback(unsigned ms,timer_callback func) +{ + unsigned ret; + struct itimerval itimer; + user_func = func; + getitimer(ITIMER_REAL,&otimer); + old_alrm = signal(SIGALRM,my_alarm_handler); + signal(SIGALRM,my_alarm_handler); + itimer.it_interval.tv_sec = 0; + itimer.it_interval.tv_usec = ms*1000; + itimer.it_value.tv_sec = 0; + itimer.it_value.tv_usec = ms*1000; + setitimer(ITIMER_REAL,&itimer,NULL); + getitimer(ITIMER_REAL,&itimer); + ret = itimer.it_interval.tv_sec*1000 + itimer.it_interval.tv_usec/1000; + if(!ret) restore_timer(); + return ret; +} + +void restore_timer(void) +{ + signal(SIGALRM,old_alrm); + setitimer(ITIMER_REAL,&otimer,NULL); +} -- cgit v1.2.3