Manpages - 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).

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/.