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Make itimerfix hack better: return the time we can't sleep at once

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This commit is contained in:
Andrey A. Chernov 1997-08-12 15:46:05 +00:00
parent e351dd657b
commit d23cc31d85
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=28107
1 changed files with 20 additions and 12 deletions
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32
lib/libc/gen/sleep.c
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@ -43,6 +43,8 @@ static char sccsid[] = "@(#)sleep.c 8.1 (Berkeley) 6/4/93";
#include "pthread_private.h"
#endif
#define ITIMERMAX 100000000
#ifndef _THREAD_SAFE
static void
sleephandler()
@ -56,6 +58,7 @@ sleep(seconds)
unsigned int seconds;
{
#ifdef _THREAD_SAFE
unsigned int rest = 0;
struct timespec time_to_sleep;
struct timespec time_remaining;
@ -64,19 +67,22 @@ sleep(seconds)
* XXX
* Hack to work around itimerfix(9) gratuitously limiting
* the acceptable range for a struct timeval.tv_sec to
* <= 100000000.
* <= ITIMERMAX.
*/
if (seconds > 100000000)
seconds = 100000000;
if (seconds > ITIMERMAX) {
rest = seconds - ITIMERMAX;
seconds = ITIMERMAX;
}
time_to_sleep.tv_sec = seconds;
time_to_sleep.tv_nsec = 0;
nanosleep(&time_to_sleep, &time_remaining);
seconds = time_remaining.tv_sec;
rest += time_remaining.tv_sec;
if (time_remaining.tv_nsec > 0)
seconds++; /* round up */
rest++; /* round up */
}
return (seconds);
return (rest);
#else
unsigned int rest = 0;
struct timespec time_to_sleep;
struct timespec time_remaining;
struct sigaction act, oact;
@ -87,10 +93,12 @@ sleep(seconds)
* XXX
* Hack to work around itimerfix(9) gratuitously limiting
* the acceptable range for a struct timeval.tv_sec to
* <= 100000000.
* <= ITIMERMAX
*/
if (seconds > 100000000)
seconds = 100000000;
if (seconds > ITIMERMAX) {
rest = seconds - ITIMERMAX;
seconds = ITIMERMAX;
}
time_to_sleep.tv_sec = seconds;
time_to_sleep.tv_nsec = 0;
@ -120,10 +128,10 @@ sleep(seconds)
sigprocmask(SIG_SETMASK, &omask, (sigset_t *)0);
/* return how long is left */
seconds = time_remaining.tv_sec;
rest += time_remaining.tv_sec;
if (time_remaining.tv_nsec > 0)
seconds++; /* round up */
rest++; /* round up */
}
return (seconds);
return (rest);
#endif /* _THREAD_SAFE */
}