Jack2 1.9.10

JackSocketServerNotifyChannel.cpp

00001 /*
00002 Copyright (C) 2004-2008 Grame
00003 
00004 This program is free software; you can redistribute it and/or modify
00005 it under the terms of the GNU Lesser General Public License as published by
00006 the Free Software Foundation; either version 2.1 of the License, or
00007 (at your option) any later version.
00008 
00009 This program is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 GNU Lesser General Public License for more details.
00013 
00014 You should have received a copy of the GNU Lesser General Public License
00015 along with this program; if not, write to the Free Software
00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 
00018 */
00019 
00020 #include "JackSocketServerNotifyChannel.h"
00021 #include "JackError.h"
00022 #include "JackRequest.h"
00023 #include "JackConstants.h"
00024 #include "JackNotification.h"
00025 #include "JackServerGlobals.h"
00026 
00027 namespace Jack
00028 {
00029 
00030 int JackSocketServerNotifyChannel::Open(const char* server_name)
00031 {
00032     if (fRequestSocket.Connect(jack_server_dir, server_name, 0) < 0) {
00033         jack_error("Cannot connect to server socket");
00034         return -1;
00035     } else {
00036         fRequestSocket.SetNonBlocking(true);
00037         return 0;
00038     }
00039 }
00040 
00041 void JackSocketServerNotifyChannel::Close()
00042 {
00043     fRequestSocket.Close();
00044 }
00045 
00046 /*
00047 The requirement is that the Notification from RT thread can be delivered... not sure using a socket is adequate here...
00048 Can the write operation block?
00049 A non blocking write operation shoud be used : check if write can succeed, and ignore the notification otherwise
00050 (since its mainly used for XRun, ignoring a notification is OK, successive XRun will come...)
00051 */
00052 void JackSocketServerNotifyChannel::Notify(int refnum, int notify, int value)
00053 {
00054     JackClientNotificationRequest req(refnum, notify, value);
00055     if (req.Write(&fRequestSocket) < 0) {
00056         jack_error("Could not write notification ref = %d notify = %d", refnum, notify);
00057     }
00058 }
00059 
00060 void JackSocketServerNotifyChannel::NotifyQuit()
00061 {
00062     Notify(-1, kQUIT, 0);
00063 }
00064 
00065 } // end of namespace
00066 
00067