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Diffstat (limited to 'upstream/opensuse-tumbleweed/man3/sem_destroy.3')
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diff --git a/upstream/opensuse-tumbleweed/man3/sem_destroy.3 b/upstream/opensuse-tumbleweed/man3/sem_destroy.3 new file mode 100644 index 00000000..524a318d --- /dev/null +++ b/upstream/opensuse-tumbleweed/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) |