семафоры (semaphores)
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)
semaphore.h — semaphores
Синопсис (Synopsis)
#include <semaphore.h>
Описание (Description)
The <semaphore.h> header shall define the sem_t type, used in
performing semaphore operations. The semaphore may be implemented
using a file descriptor, in which case applications are able to
open up at least a total of {OPEN_MAX} files and semaphores.
The <semaphore.h> header shall define the symbolic constant
SEM_FAILED which shall have type sem_t *.
The following shall be declared as functions and may also be
defined as macros. Function prototypes shall be provided.
int sem_close(sem_t *);
int sem_destroy(sem_t *);
int sem_getvalue(sem_t *restrict, int *restrict);
int sem_init(sem_t *, int, unsigned);
sem_t *sem_open(const char *, int, ...);
int sem_post(sem_t *);
int sem_timedwait(sem_t *restrict, const struct timespec *restrict);
int sem_trywait(sem_t *);
int sem_unlink(const char *);
int sem_wait(sem_t *);
Inclusion of the <semaphore.h> header may make visible symbols
defined in the <fcntl.h> and <time.h> headers.
The following sections are informative.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
fcntl.h(0p), sys_types.h(0p), time.h(0p)
The System Interfaces volume of POSIX.1‐2017, sem_close(3p),
sem_destroy(3p), sem_getvalue(3p), sem_init(3p), sem_open(3p),
sem_post(3p), sem_timedwait(3p), sem_trywait(3p), sem_unlink(3p)
