common/JackSocketNotifyChannel.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 Lesser General Public License as published by
   6   the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  13
  14   You should have received a copy of the GNU Lesser General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 */
  19
  20 #include "JackRequest.h"
  21 #include "JackSocketNotifyChannel.h"
  22 #include "JackError.h"
  23 #include "JackConstants.h"
  24
  25 namespace Jack
  26 {
  27
  28 // Server to client
  29 int JackSocketNotifyChannel::Open(const char* name)
  30 {
  31     JackLog("JackSocketNotifyChannel::Open name = %s\n", name);
  32
  33     // Connect to client listen socket
  34     if (fNotifySocket.Connect(jack_client_dir, name, 0) < 0) {
  35         jack_error("Cannot connect client socket");
  36         return -1;
  37     }
  38     // Use a time out for notifications
  39     fNotifySocket.SetReadTimeOut(SOCKET_TIME_OUT);
  40     return 0;
  41 }
  42
  43 void JackSocketNotifyChannel::Close()
  44 {
  45     JackLog("JackSocketNotifyChannel::Close\n");
  46     fNotifySocket.Close();
  47 }
  48
  49 void JackSocketNotifyChannel::ClientNotify(int refnum, const char* name, int notify, int sync, int value, int* result)
  50 {
  51     JackClientNotification event(name, refnum, notify, sync, value);
  52     JackResult res;
  53
  54     // Send notification
  55     if (event.Write(&fNotifySocket) < 0) {
  56         jack_error("Could not write notification");
  57         fNotifySocket.Close();
  58         *result = -1;
  59         return ;
  60     }
  61
  62     // Read the result in "synchronous" mode only
  63     if (sync) {
  64         // Get result : use a time out
  65         if (res.Read(&fNotifySocket) < 0) {
  66             jack_error("Could not read result");
  67             fNotifySocket.Close();
  68             *result = -1;
  69         } else {
  70             *result = res.fResult;
  71         }
  72     } else {
  73         *result = 0;
  74     }
  75 }
  76
  77 } // end of namespace
  78
  79