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From: | Constantine Kousoulos |
Subject: | Re: mach_msg trouble |
Date: | Sat, 25 Nov 2006 10:32:17 +0200 |
User-agent: | Icedove 1.5.0.7 (X11/20061013) |
Constantine Kousoulos wrote:
... port_err=mach_port_allocate(mach_task_self(),MACH_PORT_RIGHT_RECEIVE, &name); if (port_err!=KERN_SUCCESS) error(1, port_err, "cannot allocate port, %d", port_err); msg_err=mach_msg(&msg_body, MACH_RCV_MSG, 0, sizeof(msg_body), XXX, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); if (msg_err!=MACH_MSG_SUCCESS) error(1, msg_err, "error receiving message, %d", msg_err); I don't know what to put instead of XXX to make this task reveive messages at the allocated port.
I bypassed the previous problem using mach_port_t rcv = mach_reply_port(); msg_err=mach_msg(&header, MACH_RCV_MSG, 0, sizeof(header), rcv, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
Secondly, how can a client discover this server's port in order to send something?
Let me explain a bit more and correct me if i am wrong. In order for two threads to communicate via mach_msg(), those two threads must belong to the same task. In order for a client program to communicate with an entirely different server program, mig or sockets are needed. When mig is used, how can i bind my server program to a specific port to listen for messages?
Thanks in any case, Constantine
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