juce/source/src/native/android/juce_android_Messaging.cpp

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library - "Jules' Utility Class Extensions"
   5    Copyright 2004-11 by Raw Material Software Ltd.
   6
   7   ------------------------------------------------------------------------------
   8
   9    JUCE can be redistributed and/or modified under the terms of the GNU General
  10    Public License (Version 2), as published by the Free Software Foundation.
  11    A copy of the license is included in the JUCE distribution, or can be found
  12    online at www.gnu.org/licenses.
  13
  14    JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
  15    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  16    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  17
  18   ------------------------------------------------------------------------------
  19
  20    To release a closed-source product which uses JUCE, commercial licenses are
  21    available: visit www.rawmaterialsoftware.com/juce for more information.
  22
  23   ==============================================================================
  24 */
  25
  26 // (This file gets included by juce_android_NativeCode.cpp, rather than being
  27 // compiled on its own).
  28 #if JUCE_INCLUDED_FILE
  29
  30
  31 //==============================================================================
  32 void MessageManager::doPlatformSpecificInitialisation() {}
  33 void MessageManager::doPlatformSpecificShutdown() {}
  34
  35 //==============================================================================
  36 bool MessageManager::dispatchNextMessageOnSystemQueue (const bool returnIfNoPendingMessages)
  37 {
  38     Logger::outputDebugString ("*** Modal loops are not possible in Android!! Exiting...");
  39     exit (1);
  40
  41     return true;
  42 }
  43
  44 //==============================================================================
  45 bool MessageManager::postMessageToSystemQueue (Message* message)
  46 {
  47     message->incReferenceCount();
  48     getEnv()->CallVoidMethod (android.activity, android.postMessage, (jlong) (pointer_sized_uint) message);
  49     return true;
  50 }
  51
  52 JUCE_JNI_CALLBACK (JuceAppActivity, deliverMessage, void, (jobject activity, jlong value))
  53 {
  54     Message* const message = (Message*) (pointer_sized_uint) value;
  55     MessageManager::getInstance()->deliverMessage (message);
  56     message->decReferenceCount();
  57 }
  58
  59 //==============================================================================
  60 class AsyncFunctionCaller   : public AsyncUpdater
  61 {
  62 public:
  63     static void* call (MessageCallbackFunction* func_, void* parameter_)
  64     {
  65         if (MessageManager::getInstance()->isThisTheMessageThread())
  66             return func_ (parameter_);
  67
  68         AsyncFunctionCaller caller (func_, parameter_);
  69         caller.triggerAsyncUpdate();
  70         caller.finished.wait();
  71         return caller.result;
  72     }
  73
  74     void handleAsyncUpdate()
  75     {
  76         result = (*func) (parameter);
  77         finished.signal();
  78     }
  79
  80 private:
  81     WaitableEvent finished;
  82     MessageCallbackFunction* func;
  83     void* parameter;
  84     void* volatile result;
  85
  86     AsyncFunctionCaller (MessageCallbackFunction* func_, void* parameter_)
  87         : result (0), func (func_), parameter (parameter_)
  88     {}
  89
  90     JUCE_DECLARE_NON_COPYABLE (AsyncFunctionCaller);
  91 };
  92
  93 void* MessageManager::callFunctionOnMessageThread (MessageCallbackFunction* func, void* parameter)
  94 {
  95     return AsyncFunctionCaller::call (func, parameter);
  96 }
  97
  98 //==============================================================================
  99 void MessageManager::broadcastMessage (const String&)
 100 {
 101 }
 102
 103 void MessageManager::runDispatchLoop()
 104 {
 105 }
 106
 107 class QuitCallback  : public CallbackMessage
 108 {
 109 public:
 110     QuitCallback() {}
 111
 112     void messageCallback()
 113     {
 114         android.activity.callVoidMethod (android.finish);
 115     }
 116 };
 117
 118 void MessageManager::stopDispatchLoop()
 119 {
 120     (new QuitCallback())->post();
 121     quitMessagePosted = true;
 122 }
 123
 124 #endif