27 lines
650 B
C
Executable File
27 lines
650 B
C
Executable File
/* sleep() - Sleep for a number of seconds. Author: Erik van der Kouwe
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* 25 July 2009
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* (Avoids interfering with alarm/setitimer by using select, like usleep)
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*/
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#include <lib.h>
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#define sleep _sleep
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#include <signal.h>
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#include <unistd.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/select.h>
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#include <sys/time.h>
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unsigned sleep(unsigned sleep_seconds)
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{
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struct timespec rqtp, rmtp;
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/* nanosleep implements this call; ignore failure, it cannot be reported */
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rqtp.tv_sec = sleep_seconds;
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rqtp.tv_nsec = 0;
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nanosleep(&rqtp, &rmtp);
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/* round remainder up to seconds */
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return rmtp.tv_sec + ((rmtp.tv_nsec > 0) ? 1 : 0);
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}
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