glibc 知：手册27：进程间通信

1. 前言

The GNU C Library Reference Manual for version 2.35

2. 进程间通信

Inter-Process Communication

本章描述了 GNU C 库进程间通信原语。

2.1. 信号量

Semaphores

GNU C 库实现了 POSIX 和 System V 中定义的信号量 API。多个进程可以使用信号量来协调共享资源。 以下是 GNU C 库提供的信号量函数的完整列表。

2.1.1. System V 信号量

System V Semaphores

函数：int semctl (int semid, int semnum, int cmd)

Preliminary: | MT-Safe | AS-Safe | AC-Unsafe corrupt/linux | See POSIX Safety Concepts.

函数：int semget(key_t key, int nsems, int semflg)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

函数：int semop (int semid, struct sembuf *sops, size_t nsops)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

函数：int semtimedop (int semid, struct sembuf *sops, size_t nsops, const struct timespec *timeout)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

2.1.2. POSIX 信号量

POSIX Semaphores

函数：int sem_init (sem_t *sem, int pshared, unsigned int value)

Preliminary: | MT-Safe | AS-Safe | AC-Unsafe corrupt | See POSIX Safety Concepts.

函数：int sem_destroy (sem_t *sem)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

函数：sem_t *sem_open (const char *name, int oflag, ...)

Preliminary: | MT-Safe | AS-Unsafe init | AC-Unsafe init | See POSIX Safety Concepts.

函数：int sem_close (sem_t *sem)

Preliminary: | MT-Safe | AS-Unsafe lock | AC-Unsafe lock | See POSIX Safety Concepts.

函数：int sem_unlink (const char *name)

Preliminary: | MT-Safe | AS-Unsafe init | AC-Unsafe corrupt | See POSIX Safety Concepts.

函数：int sem_wait (sem_t *sem)

Preliminary: | MT-Safe | AS-Safe | AC-Unsafe corrupt | See POSIX Safety Concepts.

函数：int sem_timedwait (sem_t *sem, const struct timespec *abstime)

Preliminary: | MT-Safe | AS-Safe | AC-Unsafe corrupt | See POSIX Safety Concepts.

函数：int sem_trywait (sem_t *sem)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

函数：int sem_post (sem_t *sem)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

函数：int sem_getvalue (sem_t *sem, int *sval)

Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts.

3. 参考

• Inter-Process Communication