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https://github.com/ioacademy-jikim/debugging
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38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
#include "libcompat.h"
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int timer_settime(timer_t timerid CK_ATTRIBUTE_UNUSED,
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int flags CK_ATTRIBUTE_UNUSED,
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const struct itimerspec *new_value,
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struct itimerspec *old_value CK_ATTRIBUTE_UNUSED)
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{
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#ifdef HAVE_SETITIMER
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/*
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* If the system does not have timer_settime() but does have
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* setitimer() use that instead of alarm().
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*/
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struct itimerval interval;
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interval.it_value.tv_sec = new_value->it_value.tv_sec;
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interval.it_value.tv_usec = new_value->it_value.tv_nsec / 1000;
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interval.it_interval.tv_sec = new_value->it_interval.tv_sec;
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interval.it_interval.tv_usec = new_value->it_interval.tv_nsec / 1000;
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return setitimer(ITIMER_REAL, &interval, NULL);
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#else
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int seconds = new_value->it_value.tv_sec;
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/*
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* As the alarm() call has only second precision, if the caller
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* specifies partial seconds, we round up to the nearest second.
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*/
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if(new_value->it_value.tv_nsec > 0)
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{
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seconds += 1;
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}
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alarm(seconds);
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return 0;
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#endif
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}
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