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author | nick <nick@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-02-25 14:24:11 +0000 |
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committer | nick <nick@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-02-25 14:24:11 +0000 |
commit | cb7768f9bb35b55ae27835525cc6effe19ad099f (patch) | |
tree | 06f86a0c604bd9ae58a8135787b9b4a69f25ac95 | |
parent | 1fe9e6e3bb85b1e85bb0164a7a28115d091da883 (diff) | |
download | mpv-cb7768f9bb35b55ae27835525cc6effe19ad099f.tar.bz2 mpv-cb7768f9bb35b55ae27835525cc6effe19ad099f.tar.xz |
POSIX compatible timer's callback
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4864 b3059339-0415-0410-9bf9-f77b7e298cf2
-rw-r--r-- | linux/Makefile | 2 | ||||
-rw-r--r-- | linux/timer.c | 40 | ||||
-rw-r--r-- | linux/timer.h | 8 |
3 files changed, 49 insertions, 1 deletions
diff --git a/linux/Makefile b/linux/Makefile index f6fb05ad96..5c11a5e00c 100644 --- a/linux/Makefile +++ b/linux/Makefile @@ -3,7 +3,7 @@ include ../config.mak LIBNAME = libosdep.a -SRCS=getch2.c timer-lx.c shmem.c +SRCS=getch2.c timer-lx.c timer.c shmem.c OBJS=$(SRCS:.c=.o) ifeq ($(TARGET_ARCH_X86),yes) 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 <sys/time.h> +#include <signal.h> +#include <stddef.h> + +#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); +} diff --git a/linux/timer.h b/linux/timer.h index d51155f8a8..efda23ad6c 100644 --- a/linux/timer.h +++ b/linux/timer.h @@ -1,3 +1,5 @@ +#ifndef __TIMER_H +#define __TIMER_H void InitTimer(); unsigned int GetTimer(); @@ -7,3 +9,9 @@ float GetRelativeTime(); int usec_sleep(int usec_delay); +/* timer's callback handling */ +typedef void timer_callback( void ); +extern unsigned set_timer_callback(unsigned ms,timer_callback func); +extern void restore_timer(void); + +#endif |