Jack2 1.9.6

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 
00026 namespace Jack
00027 {
00028 
00029 int JackSocketServerNotifyChannel::Open(const char* server_name)
00030 {
00031     if (fRequestSocket.Connect(jack_server_dir, server_name, 0) < 0) {
00032         jack_error("Cannot connect to server socket");
00033         return -1;
00034     } else {
00035         fRequestSocket.SetNonBlocking(true);
00036         return 0;
00037     }
00038 }
00039 
00040 void JackSocketServerNotifyChannel::Close()
00041 {
00042     fRequestSocket.Close();
00043 }
00044 
00045 /*
00046 The requirement is that the Notification from RT thread can be delivered... not sure using a socket is adequate here...
00047 Can the write operation block?
00048 A non blocking write operation shoud be used : check if write can succeed, and ignore the notification otherwise
00049 (since its mainly used for XRun, ignoring a notification is OK, successive XRun will come...)
00050 */
00051 void JackSocketServerNotifyChannel::Notify(int refnum, int notify, int value)
00052 {
00053     JackClientNotificationRequest req(refnum, notify, value);
00054     if (req.Write(&fRequestSocket) < 0) {
00055         jack_error("Could not write request ref = %d notify = %d", refnum, notify);
00056     }
00057 }
00058 
00059 void JackSocketServerNotifyChannel::NotifyQuit()
00060 {
00061     JackClientNotificationRequest req(-1, kQUIT, 0);
00062     if (req.Write(&fRequestSocket) < 0) {
00063         jack_error("Could not write request ref = %d notify = %d", -1, kQUIT);
00064     }
00065 }
00066     
00067 
00068 } // end of namespace
00069 
00070