Group PJ_SEM

group PJ_SEM

This module provides abstraction for semaphores, where available.

Functions

pj_status_t pj_sem_create(pj_pool_t *pool, const char *name, unsigned initial, unsigned max, pj_sem_t **sem)

Create semaphore.

Parameters

  • pool – The pool.

  • name – Name to be assigned to the semaphore (for logging purpose)

  • initial – The initial count of the semaphore.

  • max – The maximum count of the semaphore.

  • sem – Pointer to hold the semaphore created.

Returns

PJ_SUCCESS on success, or the error code.

pj_status_t pj_sem_wait(pj_sem_t *sem)

Wait for semaphore.

Parameters

sem – The semaphore.

Returns

PJ_SUCCESS on success, or the error code.

pj_status_t pj_sem_trywait(pj_sem_t *sem)

Try wait for semaphore.

Parameters

sem – The semaphore.

Returns

PJ_SUCCESS on success, or the error code.

pj_status_t pj_sem_post(pj_sem_t *sem)

Release semaphore.

Parameters

sem – The semaphore.

Returns

PJ_SUCCESS on success, or the error code.

pj_status_t pj_sem_destroy(pj_sem_t *sem)

Destroy semaphore.

Parameters

sem – The semaphore.

Returns

PJ_SUCCESS on success, or the error code.