Jack2  1.9.9
JackWinNamedPipeServerNotifyChannel.cpp
1 /*
2 Copyright (C) 2004-2006 Grame
3 
4 This program is free software; you can redistribute it and/or modify
5  it under the terms of the GNU General Public License as published by
6  the Free Software Foundation; either version 2 of the License, or
7  (at your option) any later version.
8 
9  This program is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  GNU General Public License for more details.
13 
14  You should have received a copy of the GNU General Public License
15  along with this program; if not, write to the Free Software
16  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 
18 */
19 
20 #include "JackWinNamedPipeServerNotifyChannel.h"
21 #include "JackError.h"
22 #include "JackRequest.h"
23 #include "JackConstants.h"
24 #include "JackNotification.h"
25 
26 namespace Jack
27 {
28 
29 int JackWinNamedPipeServerNotifyChannel::Open(const char* server_name)
30 {
31  if (fRequestPipe.Connect(jack_server_dir, server_name, 0) < 0) {
32  jack_error("Cannot connect to server pipe");
33  return -1;
34  } else {
35  return 0;
36  }
37 }
38 
39 void JackWinNamedPipeServerNotifyChannel::Close()
40 {
41  fRequestPipe.Close();
42 }
43 
44 /*
45 The requirement is that the Notification from RT thread can be delivered... not sure using a pipe is adequate here...
46 Can the write operation block?
47 A non blocking write operation shoud be used : check if write can succeed, and ignore the notification otherwise
48 (since its mainly used for XRun, ignoring a notification is OK, successive XRun will come...)
49 */
50 void JackWinNamedPipeServerNotifyChannel::Notify(int refnum, int notify, int value)
51 {
52  JackClientNotificationRequest req(refnum, notify, value);
53  if (req.Write(&fRequestPipe) < 0) {
54  jack_error("Could not write notification ref = %d notify = %d", refnum, notify);
55  }
56 }
57 
58 void JackWinNamedPipeServerNotifyChannel::NotifyQuit()
59 {
60  Notify(-1, kQUIT, 0);
61 }
62 
63 } // end of namespace
64 
65 
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:91