急求, Linux下如何使用定时器...

gprsgsn

最好能给个简单的完整例子, 谢了...

kakuyou

[code:1]
#include <stdio.h>
#include <sys/time.h>
#include <signal.h>
#include <unistd.h>

#define DELAY_SEC 1
#define DELAY_USEC 0

volatile int count = 0;
char buf[16];

void sig_action()
{
    memset (buf, 0, 16);
    sprintf(buf, "%d\n", count++);
    write(1, buf, 16);
    fsync(1);
}

int main()
{
    struct sigaction act, oldact;
    struct itimerval value, ovalue;
    int i;

    /* signal route */
    act.sa_handler = sig_action;
    act.sa_flags = 0;
    sigaction(SIGALRM, &act, &oldact);


    value.it_value.tv_usec = DELAY_USEC;
    value.it_value.tv_sec = DELAY_SEC;
    value.it_interval.tv_usec = DELAY_USEC;
    value.it_interval.tv_sec = DELAY_SEC;
    printf("%d, %d\n", DELAY_SEC, DELAY_USEC);
    setitimer(ITIMER_REAL, &value, &ovalue);



    for (i = 0; i < 10; i++) {
        sleep(10);
    }

    sigaction(SIGALRM, &oldact, NULL);
    return 0;
}
[/code:1]