Unit 'ipc'	Package
[Overview][Constants][Types][Procedures and functions][Index]	[#rtl]

msgsnd

Send a message to the message queue.

Declaration

Source position: ipc.pp line 666

function msgsnd(

msqid: cint;

msgp: PMSGbuf;

msgsz: size_t;

msgflg: cint

):cint;

Description

msgsend sends a message to a message queue with ID msqid. msgp is a pointer to a message buffer, that should be based on the TMsgBuf type. msgsiz is the size of the message (NOT of the message buffer record !)

The msgflg can have a combination of the following values (ORed together):

0: No special meaning. The message will be written to the queue. If the queue is full, then the process is blocked.
IPC_NOWAIT: If the queue is full, then no message is written, and the call returns immediately.

The function returns True if the message was sent successfully, False otherwise.

For an example, see msgctl.

Errors

In case of error, the call returns False, and IPCerror is set.

msgget		Return message queue ID, possibly creating the queue.
msgrcv		Retrieve a message from the queue.
msgctl		Perform various operations on a message queue.

msgsnd

Declaration

Description

Errors

See also