/[svn]/linuxsampler/trunk/src/engines/InstrumentManagerThread.cpp
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Diff of /linuxsampler/trunk/src/engines/InstrumentManagerThread.cpp

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revision 1424 by schoenebeck, Sun Oct 14 22:00:17 2007 UTC revision 2326 by persson, Thu Mar 8 19:40:14 2012 UTC
# Line 1  Line 1 
1  /***************************************************************************  /***************************************************************************
2   *                                                                         *   *                                                                         *
3   *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *   *   Copyright (C) 2005 - 2012 Christian Schoenebeck                       *
4   *                                                                         *   *                                                                         *
5   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
6   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 21  Line 21 
21  #include "InstrumentManagerThread.h"  #include "InstrumentManagerThread.h"
22    
23  #include "../common/global_private.h"  #include "../common/global_private.h"
24    #include "EngineChannelFactory.h"
25    
26  namespace LinuxSampler {  namespace LinuxSampler {
27    
28      InstrumentManagerThread::InstrumentManagerThread() : Thread(true, false, 0, -4) {      InstrumentManagerThread::InstrumentManagerThread() : Thread(true, false, 0, -4) {
29            eventHandler.pThread = this;
30      }      }
31    
32      InstrumentManagerThread::~InstrumentManagerThread() {      InstrumentManagerThread::~InstrumentManagerThread() {
# Line 43  namespace LinuxSampler { Line 45  namespace LinuxSampler {
45       */       */
46      void InstrumentManagerThread::StartNewLoad(String Filename, uint uiInstrumentIndex, EngineChannel* pEngineChannel) {      void InstrumentManagerThread::StartNewLoad(String Filename, uint uiInstrumentIndex, EngineChannel* pEngineChannel) {
47          dmsg(1,("Scheduling '%s' (Index=%d) to be loaded in background (if not loaded yet).\n",Filename.c_str(),uiInstrumentIndex));          dmsg(1,("Scheduling '%s' (Index=%d) to be loaded in background (if not loaded yet).\n",Filename.c_str(),uiInstrumentIndex));
         // already tell the engine which instrument to load  
         pEngineChannel->PrepareLoadInstrument(Filename.c_str(), uiInstrumentIndex);  
48    
49            // the listener only needs to be registered once in the
50            // Sampler, but as we don't know if Sampler has been
51            // recreated, we simply remove and add every time
52            pEngineChannel->GetSampler()->RemoveChannelCountListener(&eventHandler);
53            pEngineChannel->GetSampler()->AddChannelCountListener(&eventHandler);
54            
55          command_t cmd;          command_t cmd;
56          cmd.type           = command_t::DIRECT_LOAD;          cmd.type           = command_t::DIRECT_LOAD;
57          cmd.pEngineChannel = pEngineChannel;          cmd.pEngineChannel = pEngineChannel;
58            cmd.instrumentId.Index = uiInstrumentIndex;
59            cmd.instrumentId.FileName = Filename;
60    
61          mutex.Lock();          mutex.Lock();
62          queue.push_back(cmd);          queue.push_back(cmd);
# Line 88  namespace LinuxSampler { Line 96  namespace LinuxSampler {
96      // Entry point for the task thread.      // Entry point for the task thread.
97      int InstrumentManagerThread::Main() {      int InstrumentManagerThread::Main() {
98          while (true) {          while (true) {
99              while (!queue.empty()) {  
100                #if CONFIG_PTHREAD_TESTCANCEL
101                TestCancel();
102                #endif
103    
104                while (true) {
105                  command_t cmd;                  command_t cmd;
106    
107                  // grab a new command from the queue                  // grab a new command from the queue
108                  mutex.Lock();                  mutex.Lock();
109                  cmd = queue.front();                  bool empty = queue.empty();
110                    if (!empty) {
111                        cmd = queue.front();
112                        queue.pop_front();
113    
114                        if (cmd.type == command_t::DIRECT_LOAD) {
115                            EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, false);
116                        }
117                    }
118                  mutex.Unlock();                  mutex.Unlock();
119                    if (empty) break;
120    
121                  try {                  try {
122                      switch (cmd.type) {                      switch (cmd.type) {
123                          case command_t::DIRECT_LOAD:                          case command_t::DIRECT_LOAD:
124                                cmd.pEngineChannel->PrepareLoadInstrument(cmd.instrumentId.FileName.c_str(), cmd.instrumentId.Index);
125                              cmd.pEngineChannel->LoadInstrument();                              cmd.pEngineChannel->LoadInstrument();
126                                EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
127                              break;                              break;
128                          case command_t::INSTR_MODE:                          case command_t::INSTR_MODE:
129                              cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);                              cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);
# Line 109  namespace LinuxSampler { Line 133  namespace LinuxSampler {
133                      }                      }
134                  } catch (Exception e) {                  } catch (Exception e) {
135                      e.PrintMessage();                      e.PrintMessage();
136                        if (cmd.type == command_t::DIRECT_LOAD) {
137                            EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
138                        }
139                  } catch (...) {                  } catch (...) {
140                      std::cerr << "InstrumentManagerThread: some exception occured, could not finish task\n" << std::flush;                      std::cerr << "InstrumentManagerThread: some exception occured, could not finish task\n" << std::flush;
141                        if (cmd.type == command_t::DIRECT_LOAD) {
142                            EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
143                        }
144                  }                  }
   
                 // remove processed command from queue  
                 mutex.Lock();  
                 queue.pop_front();  
                 mutex.Unlock();  
145              }              }
146    
147              // nothing left to do, sleep until new jobs arrive              // nothing left to do, sleep until new jobs arrive
# Line 126  namespace LinuxSampler { Line 151  namespace LinuxSampler {
151              // unlock condition object so it can be turned again by other thread              // unlock condition object so it can be turned again by other thread
152              conditionJobsLeft.Unlock();              conditionJobsLeft.Unlock();
153          }          }
154            return 0;
155        }
156    
157        void InstrumentManagerThread::EventHandler::ChannelToBeRemoved(SamplerChannel* pChannel) {
158            /*
159               Removing from the queue an eventual scheduled loading of an instrument
160               to a sampler channel which is going to be removed.
161            */
162            pThread->mutex.Lock();
163            std::list<command_t>::iterator it;
164            for (it = pThread->queue.begin(); it != pThread->queue.end();){
165                if ((*it).type != command_t::DIRECT_LOAD) { ++it; continue; }
166                if ((*it).pEngineChannel == pChannel->GetEngineChannel()) {
167                    it = pThread->queue.erase(it);
168                    // we don't break here because the same engine channel could
169                    // occur more than once in the queue, so don't make optimizations
170                } else {
171                    ++it;
172                }
173            }
174            pThread->mutex.Unlock();
175        }
176    
177    #ifdef __APPLE__
178        int InstrumentManagerThread::StopThread() {
179            // This is a fix for Mac OS X, where SignalStopThread doesn't
180            // wake up a thread waiting for a condition variable.
181            SignalStopThread(); // send stop signal, but don't wait
182            conditionJobsLeft.Set(true); // wake thread
183            return Thread::StopThread(); // then wait for it to cancel
184        }
185    #endif
186    
187    #ifdef WIN32
188        int InstrumentManagerThread::StopThread() {
189            int res = Thread::StopThread();
190            conditionJobsLeft.Reset();
191            return res;
192      }      }
193    #endif
194    
195  } // namespace LinuxSampler  } // namespace LinuxSampler
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