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 │ └──────────────┴───────────────┴─────────┘
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 5.07 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 2017-09-15 SEM_DESTROY(3)
Pages that refer to this page: sem_init(3), sem_overview(7)
Copyright and license for this manual page