sem_timedwait.3

rtlinux-3.1源代码

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.TH "sem_timedwait" "3" 
.SH "NAME" 
sem_timedwait \(em lock a semaphore with a timeout 
.SH "SYNOPSIS" 
.PP 
.nf 
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#include <semaphore.h> 
 
int \fBsem_timedwait\fP(sem_t *\fBsem\fR, const struct timespec *\fBabs_timeout\fR); 
.fi 
.SH "DESCRIPTION" 
.PP 
The \fBsem_timedwait\fP function locks the semaphore referenced by \fBsem\fR like \fBsem_wait\fP. 
If the semaphore is not locked at the time specified by the 
\fBabs_timeout\fR, \fBsem_timedwait\fP returns 
with the \fBETIMEDOUT\fR error. 
 
The absolute timeout is expressed with respect to the 
\fBCLOCK_REALTIME\fR clock. 
.SH "RETURN VALUE" 
.PP 
On success, zero is returned. On error, -1 is returned, and errno is set 
appropriately. 
.SH "ERRORS" 
.PP 
All error values of \fBsem_wait\fP apply. 
In addition, the following errors defined. 
.IP "ETIMEDOUT" 10 
The semaphore lock operation timed out. 
.SH "AUTHOR" 
.PP 
Michael Barabanov (\[e-mail] (link to URL mailto:[e-mail]) \fR) 
.SH "SEE ALSO" 
\fIsem_wait(3) (link to URL ../susv2/xsh/sem_wait.html) \fR, \fIclock_gettime(3) (link to URL ../susv2/xsh/clock_gettime.html) \fR 
.PP 
\(co2001 FSMLabs Inc. 
.PP 
All rights reserved. 
...\" created by instant / docbook-to-man, Thu 26 Jul 2001, 11:20