Semaphore, Shared Memory and IPC

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  • 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_var — Removes a variable from shared memory
  • shm_remove — Removes shared memory from Unix systems