An item through which a task receives messages.

A message port is an item through which a task receives messages.

kernel

MSGPORTNODE

CreateMsgPort(), CreateItem()

''%%DeleteMsgPort%%''(), DeleteItem()

''%%FindMsgPort%%''(), FindItem(), FindNamedItem(), FindVersionedItem()

''%%WaitPort%%''(), GetMsg(), SendMsg(), SendSmallMsg(), ReplyMsg(), ReplySmallMsg()

• CREATEPORT_TAG_SIGNAL (int32) Create. Whenever a message arrives at a message port, the kernel sends a signal to the owner of the message port. This tag lets you specify which signal should be sent. If this tag is not provided, the kernel will allocate a signal for the message port itself.

• CREATEPORT_TAG_USERDATA (void *) Create. Lets you specify the 32-bit value that gets put into the mp_UserData field of the MsgPort structure. This can be anything you want, and is sometimes useful to idenify a message port.