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来源: BlogBus 原始链接: http://www.blogbus.com:80/blogbus/blog/index.php?blogid=2441&pg=71&cat= 存档链接: https://web.archive.org/web/20041124141005id_/http://www.blogbus.com:80/blogbus/blog/index.php?blogid=2441&pg=71&cat= 作者: zhouxiaohu

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struct sigevent sig_spec; sigset_t allsigs; struct itimerspec tmr_setting; timer_t timer_h; /* setup signal to respond to timer / sigemptyset(&sa.sa_mask); sa.sa_flags = SA_SIGINFO; sa.sa_sigaction = timer_intr; if (sigaction(SIGRTMIN, &sa, NULL) < 0) perror(3sigaction2); sig_spec.sigev_notify = SIGEV_SIGNAL; sig_spec.sigev_signo = SIGRTMIN; / create timer, which uses the REALTIME clock / if (timer_create(CLOCK_REALTIME, &sig_spec, &timer_h) < 0) perror(3timer create2); / set the initial expiration and frequency of timer / tmr_setting.it_value.tv_sec = 1; tmr_setting.it_value.tv_nsec = 0; tmr_setting.it_interval.tv_sec = num_secs; tmr_setting.it_interval.tv_sec = num_nsecs; if ( timer_settime(timer_h, 0, &tmr_setting,NULL) < 0) perror(3settimer2); / wait for signals / sigemptyset(&allsigs); while (1) { sigsuspend(&allsigs); } } / routine that is called when timer expires */ void timer_intr(int sig, siginfo_t *extra, void cruft) { / perform periodic processing and then exit */ } POSIX 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