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    msgget

    Return message queue ID, possibly creating the queue.

    Declaration

    Source position: ipc.pp line 665

    function msgget(key: TKey; msgflg: cint) : cint;

    Description

    msgget returns the ID of the message queue described by key. Depending on the flags in msgflg, a new queue is created.

    msgflg can have one or more of the following values (combined by ORs):

    IPC_CREAT
    The queue is created if it doesn't already exist.
    IPC_EXCL
    If used in combination with IPC_CREAT, causes the call to fail if the queue already exists. It cannot be used by itself.

    Optionally, the flags can be ORed with a permission mode, which is the same mode that can be used in the file system.

    For an example, see msgctl.

    Errors

    On error, -1 is returned, and IPCError is set.

    See also

    Name Description
    ftok Create token from filename.
    msgsnd Send a message to the message queue.
    msgrcv Retrieve a message from the queue.
    msgctl Perform various operations on a message queue.