уничтожить безымянный семафор (destroy an unnamed semaphore)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
sem_destroy — destroy an unnamed semaphore
Синопсис (Synopsis)
#include <semaphore.h>
int sem_destroy(sem_t *sem);
Описание (Description)
The sem_destroy() function shall destroy the unnamed semaphore
indicated by sem. Only a semaphore that was created using
sem_init() may be destroyed using sem_destroy(); the effect of
calling sem_destroy() with a named semaphore is undefined. The
effect of subsequent use of the semaphore sem is undefined until
sem is reinitialized by another call to sem_init().
It is safe to destroy an initialized semaphore upon which no
threads are currently blocked. The effect of destroying a
semaphore upon which other threads are currently blocked is
undefined.
Возвращаемое значение (Return value)
Upon successful completion, a value of zero shall be returned.
Otherwise, a value of -1 shall be returned and errno set to
indicate the error.
Ошибки (Error)
The sem_destroy() function may fail if:
EINVAL The sem argument is not a valid semaphore.
EBUSY There are currently processes blocked on the semaphore.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
semctl(3p), semget(3p), semop(3p), sem_init(3p), sem_open(3p)
The Base Definitions volume of POSIX.1‐2017, semaphore.h(0p)
