diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
| commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
| tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3/sem_destroy.3 | |
| parent | Initial commit. (diff) | |
| download | manpages-upstream/6.05.01.tar.xz manpages-upstream/6.05.01.zip | |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/sem_destroy.3')
| -rw-r--r-- | man3/sem_destroy.3 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/man3/sem_destroy.3 b/man3/sem_destroy.3 new file mode 100644 index 0000000..524a318 --- /dev/null +++ b/man3/sem_destroy.3 @@ -0,0 +1,76 @@ +'\" t +.\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH sem_destroy 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +sem_destroy \- destroy an unnamed semaphore +.SH LIBRARY +POSIX threads library +.RI ( libpthread ", " \-lpthread ) +.SH SYNOPSIS +.nf +.B #include <semaphore.h> +.PP +.BI "int sem_destroy(sem_t *" sem ); +.fi +.SH DESCRIPTION +.BR sem_destroy () +destroys the unnamed semaphore at the address pointed to by +.IR sem . +.PP +Only a semaphore that has been initialized by +.BR sem_init (3) +should be destroyed using +.BR sem_destroy (). +.PP +Destroying a semaphore that other processes or threads are +currently blocked on (in +.BR sem_wait (3)) +produces undefined behavior. +.PP +Using a semaphore that has been destroyed produces undefined results, +until the semaphore has been reinitialized using +.BR sem_init (3). +.SH RETURN VALUE +.BR sem_destroy () +returns 0 on success; +on error, \-1 is returned, and +.I errno +is set to indicate the error. +.SH ERRORS +.TP +.B EINVAL +.I sem +is not a valid semaphore. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR sem_destroy () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001. +.SH NOTES +An unnamed semaphore should be destroyed with +.BR sem_destroy () +before the memory in which it is located is deallocated. +Failure to do this can result in resource leaks on some implementations. +.\" But not on NPTL, where sem_destroy () is a no-op.. +.SH SEE ALSO +.BR sem_init (3), +.BR sem_post (3), +.BR sem_wait (3), +.BR sem_overview (7) |