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Semaphore Functions

Table of Contents

ftok — Convert a pathname and a project identifier to a System V IPC key
msg_get_queue — Create or attach to a message queue
msg_queue_exists — Check whether a message queue exists
msg_receive — Receive a message from a message queue
msg_remove_queue — Destroy a message queue
msg_send — Send a message to a message queue
msg_set_queue — Set information in the message queue data structure
msg_stat_queue — Returns information from the message queue data structure
sem_acquire — Acquire a semaphore
sem_get — Get a semaphore id
sem_release — Release a semaphore
sem_remove — Remove a semaphore
shm_attach — Creates or open a shared memory segment
shm_detach — Disconnects from shared memory segment
shm_get_var — Returns a variable from shared memory
shm_has_var — Check whether a specific entry exists
shm_put_var — Inserts or updates a variable in shared memory
shm_remove — Removes shared memory from Unix systems
shm_remove_var — Removes a variable from shared memory