30 lines
474 B
C
30 lines
474 B
C
/*
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* alarm.c
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*/
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#include <sys/time.h>
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#include <sys/syscall.h>
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#ifdef __NR_alarm
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_syscall1(unsigned int,alarm,unsigned int,seconds);
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#else
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/* Emulate alarm() via setitimer() */
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unsigned int alarm(unsigned int seconds)
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{
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struct itimerval iv;
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iv.it_interval.tv_sec = iv.it_interval.tv_usec = 0;
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iv.it_value.tv_sec = seconds;
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iv.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &iv, &iv);
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return iv.it_value.tv_sec + (iv.it_value.tv_usec ? 1 : 0);
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}
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#endif
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