windows/JackWinNamedPipeClientChannel.cpp

   1 /*
   2  Copyright (C) 2004-2008 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
  21 #include "JackWinNamedPipeClientChannel.h"
  22 #include "JackRequest.h"
  23 #include "JackClient.h"
  24 #include "JackGlobals.h"
  25 #include "JackError.h"
  26
  27 namespace Jack
  28 {
  29
  30 JackWinNamedPipeClientChannel::JackWinNamedPipeClientChannel()
  31     :JackGenericClientChannel(),fThread(this)
  32 {
  33      fRequest = new JackWinNamedPipeClient();
  34 }
  35
  36 JackWinNamedPipeClientChannel::~JackWinNamedPipeClientChannel()
  37 {
  38     delete fRequest;
  39 }
  40
  41 int JackWinNamedPipeClientChannel::Open(const char* server_name, const char* name, int uuid, char* name_res, JackClient* obj, jack_options_t options, jack_status_t* status)
  42 {
  43     int result = 0;
  44     jack_log("JackWinNamedPipeClientChannel::Open name = %s", name);
  45
  46     /*
  47     16/08/07: was called before doing "fRequest->Connect" .... still necessary?
  48     if (fNotificationListenPipe.Bind(jack_client_dir, name, 0) < 0) {
  49         jack_error("Cannot bind pipe");
  50         goto error;
  51     }
  52     */
  53
  54     if (fRequest->Connect(jack_server_dir, server_name, 0) < 0) {
  55         jack_error("Cannot connect to server pipe");
  56         goto error;
  57     }
  58
  59     // Check name in server
  60     ClientCheck(name, uuid, name_res, JACK_PROTOCOL_VERSION, (int)options, (int*)status, &result, true);
  61     if (result < 0) {
  62         int status1 = *status;
  63         if (status1 & JackVersionError) {
  64             jack_error("JACK protocol mismatch %d", JACK_PROTOCOL_VERSION);
  65         } else {
  66             jack_error("Client name = %s conflits with another running client", name);
  67         }
  68     }
  69
  70     if (fNotificationListenPipe.Bind(jack_client_dir, name_res, 0) < 0) {
  71         jack_error("Cannot bind pipe");
  72         goto error;
  73     }
  74
  75     fClient = obj;
  76     return 0;
  77
  78 error:
  79     fRequest->Close();
  80     fNotificationListenPipe.Close();
  81     return -1;
  82 }
  83
  84 void JackWinNamedPipeClientChannel::Close()
  85 {
  86     fRequest->Close();
  87     fNotificationListenPipe.Close();
  88     // Here the thread will correctly stop when the pipe are closed
  89     fThread.Stop();
  90 }
  91
  92 int JackWinNamedPipeClientChannel::Start()
  93 {
  94     jack_log("JackWinNamedPipeClientChannel::Start");
  95     /*
  96      To be sure notification thread is started before ClientOpen is called.
  97     */
  98     if (fThread.StartSync() != 0) {
  99         jack_error("Cannot start Jack client listener");
 100         return -1;
 101     } else {
 102         return 0;
 103     }
 104 }
 105
 106 void JackWinNamedPipeClientChannel::Stop()
 107 {
 108     jack_log("JackWinNamedPipeClientChannel::Stop");
 109     fThread.Kill();  // Unsafe on WIN32... TODO : solve WIN32 thread Kill issue
 110 }
 111
 112 bool JackWinNamedPipeClientChannel::Init()
 113 {
 114     jack_log("JackWinNamedPipeClientChannel::Init");
 115
 116     // Setup context
 117     if (!jack_tls_set(JackGlobals::fNotificationThread, this)) {
 118         jack_error("Failed to set thread notification key");
 119     }
 120
 121     if (!fNotificationListenPipe.Accept()) {
 122         jack_error("JackWinNamedPipeClientChannel: cannot establish notification pipe");
 123         return false;
 124     } else {
 125         return true;
 126     }
 127 }
 128
 129 bool JackWinNamedPipeClientChannel::Execute()
 130 {
 131     JackClientNotification event;
 132     JackResult res;
 133
 134     if (event.Read(&fNotificationListenPipe) < 0) {
 135         jack_error("JackWinNamedPipeClientChannel read fail");
 136         goto error;
 137     }
 138
 139     res.fResult = fClient->ClientNotify(event.fRefNum, event.fName, event.fNotify, event.fSync, event.fMessage, event.fValue1, event.fValue2);
 140
 141     if (event.fSync) {
 142         if (res.Write(&fNotificationListenPipe) < 0) {
 143             jack_error("JackWinNamedPipeClientChannel write fail");
 144             goto error;
 145         }
 146     }
 147     return true;
 148
 149 error:
 150     // Close the pipes, server wont be able to create them otherwise.
 151     fNotificationListenPipe.Close();
 152     fRequest->Close();
 153     fClient->ShutDown();
 154     return false;
 155 }
 156
 157 } // end of namespace
 158
 159