|SEM_DESTROY(3)||Linux Programmer's Manual||SEM_DESTROY(3)|
NAME¶sem_destroy - destroy an unnamed semaphore
#include <semaphore.h> int sem_destroy(sem_t *sem);
Link with -pthread.
DESCRIPTION¶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).
RETURN VALUE¶sem_destroy() returns 0 on success; on error, -1 is returned, and errno is set to indicate the error.
- sem is not a valid semaphore.
ATTRIBUTES¶For an explanation of the terms used in this section, see attributes(7).
|sem_destroy ()||Thread safety||MT-Safe|
CONFORMING TO¶POSIX.1-2001, POSIX.1-2008.
NOTES¶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.
SEE ALSO¶sem_init(3), sem_post(3), sem_wait(3), sem_overview(7)
COLOPHON¶This page is part of release 4.10 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/.