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 General Public License as published by
00006   the Free Software Foundation; either version 2 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 General Public License for more details.
00013 
00014   You should have received a copy of the GNU General Public License
00015   along with this program; if not, write to the Free Software
00016   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 
00018 */
00019 
00020 #include "JackSocketServerNotifyChannel.h"
00021 #include "JackError.h"
00022 #include "JackRequest.h"
00023 #include "JackConstants.h"
00024 
00025 namespace Jack
00026 {
00027 
00028 int JackSocketServerNotifyChannel::Open(const char* server_name)
00029 {
00030     if (fRequestSocket.Connect(jack_server_dir, server_name, 0) < 0) {
00031         jack_error("Cannot connect to server socket");
00032         return -1;
00033     } else {
00034         return 0;
00035     }
00036 }
00037 
00038 void JackSocketServerNotifyChannel::Close()
00039 {
00040     fRequestSocket.Close();
00041 }
00042 
00043 /*
00044 The requirement is that the Notification from RT thread can be delivered... not sure using a socket is adequate here... 
00045 Can the write operation block? 
00046 A non blocking write operation shoud be used : check if write can succeed, and ignore the notification otherwise 
00047 (since its mainly used for XRun, ignoring a notification is OK, successive XRun will come...)
00048 */
00049 void JackSocketServerNotifyChannel::ClientNotify(int refnum, int notify, int value)
00050 {
00051     JackClientNotificationRequest req(refnum, notify, value);
00052     if (req.Write(&fRequestSocket) < 0) {
00053         jack_error("Could not write request ref = %ld notify = %ld", refnum, notify);
00054     }
00055 }
00056 
00057 } // end of namespace
00058 
00059 

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