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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
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SEM_DESTROY(3) Linux Programmer's Manual SEM_DESTROY(3)
sem_destroy - destroy an unnamed semaphore
#include <semaphore.h>
int sem_destroy(sem_t *sem);
Link with -pthread.
sem_destroy() destroys the unnamed semaphore at the address
pointed to by sem.
Only a semaphore that has been initialized by sem_init(3) should
be destroyed using sem_destroy().
Destroying a semaphore that other processes or threads are
currently blocked on (in sem_wait(3)) produces undefined
behavior.
Using a semaphore that has been destroyed produces undefined
results, until the semaphore has been reinitialized using
sem_init(3).
sem_destroy() returns 0 on success; on error, -1 is returned, and
errno is set to indicate the error.
EINVAL sem is not a valid semaphore.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│sem_destroy() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008.
An unnamed semaphore should be destroyed with sem_destroy()
before the memory in which it is located is deallocated. Failure
to do this can result in resource leaks on some implementations.
sem_init(3), sem_post(3), sem_wait(3), sem_overview(7)
This page is part of release 5.13 of the Linux man-pages project.
A description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2021-03-22 SEM_DESTROY(3)
Pages that refer to this page: sem_init(3), sem_overview(7)
Copyright and license for this manual page
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