[Overview][Constants][Types][Procedures and functions][Index] | Reference for unit 'ipc' (#rtl)

# Reference for unit 'ipc': Constants

`IPC_CREAT` |  | Create if key is nonexistent
`IPC_EXCL` |  | fail if key exists
`IPC_INFO` |  | For ipcs call
`IPC_NOWAIT` |  | return error on wait
`IPC_RMID` |  | Remove resource
`IPC_SET` |  | set ipc_perm options
`IPC_STAT` |  | get ipc_perm options
`MSGMAX` |  | Internal Message control code. Do not use
`MSGMNB` |  | Internal Message control code. Do not use
`MSGMNI` |  | Internal Message control code. Do not use
`MSG_EXCEPT` |  | Internal Message control code. Do not use
`MSG_NOERROR` |  | Internal Message control code. Do not use
`SEM_GETALL` |  | Semaphore operation: Get all semaphore values
`SEM_GETNCNT` |  | Semaphore operation: Get number of processes waiting for resource.
`SEM_GETPID` |  | Semaphore operation: Get process ID of last operation.
`SEM_GETVAL` |  | Semaphore operation: Get current value of semaphore
`SEM_GETZCNT` |  | Semaphore operation: Get number of processes waiting for semaphores to reach zero
`SEM_SEMMNI` |  | Semaphore operation: ?
`SEM_SEMMNS` |  | Semaphore operation: ?
`SEM_SEMMSL` |  | Semaphore operation: ?
`SEM_SEMOPM` |  | Semaphore operation: ?
`SEM_SEMVMX` |  | Semaphore operation: ?
`SEM_SETALL` |  | Semaphore operation: Set all semaphore values
`SEM_SETVAL` |  | Semaphore operation: Set semaphore value
`SEM_UNDO` |  | Constant for use in semop
`SHM_LOCK` |  | This constant is used in the shmctl call.
`SHM_R` |  | This constant is used in the shmctl call.
`SHM_RDONLY` |  | This constant is used in the shmctl call.
`SHM_REMAP` |  | This constant is used in the shmctl call.
`SHM_RND` |  | This constant is used in the shmctl call.
`SHM_UNLOCK` |  | This constant is used in the shmctl call.
`SHM_W` |  | This constant is used in the shmctl call.

Documentation generated on: Feb 26 2014