SEM_DESTROY(3) Linux Programmer's Manual SEM_DESTROY(3)NAMEsem_destroy - destroy an unnamed semaphore
SYNOPSIS
#include <semaphore.h>
int sem_destroy(sem_t *sem);
Link with -pthread.
DESCRIPTIONsem_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 VALUEsem_destroy() returns 0 on success; on error, -1 is returned, and errno
is set to indicate the error.
ERRORS
EINVAL sem is not a valid semaphore.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────┼───────────────┼─────────┤
│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 ALSOsem_init(3), sem_post(3), sem_wait(3), sem_overview(7)COLOPHON
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Linux 2017-09-15 SEM_DESTROY(3)
