/[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 2316 by persson, Sat Feb 18 13:51:38 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            static bool listenerRegistered = false;
50            if (!listenerRegistered) {
51                pEngineChannel->GetSampler()->AddChannelCountListener(&eventHandler);
52                listenerRegistered = true;
53            }
54            
55            
56          command_t cmd;          command_t cmd;
57          cmd.type           = command_t::DIRECT_LOAD;          cmd.type           = command_t::DIRECT_LOAD;
58          cmd.pEngineChannel = pEngineChannel;          cmd.pEngineChannel = pEngineChannel;
59            cmd.instrumentId.Index = uiInstrumentIndex;
60            cmd.instrumentId.FileName = Filename;
61    
62          mutex.Lock();          mutex.Lock();
63          queue.push_back(cmd);          queue.push_back(cmd);
# Line 88  namespace LinuxSampler { Line 97  namespace LinuxSampler {
97      // Entry point for the task thread.      // Entry point for the task thread.
98      int InstrumentManagerThread::Main() {      int InstrumentManagerThread::Main() {
99          while (true) {          while (true) {
100    
101                #if CONFIG_PTHREAD_TESTCANCEL
102                TestCancel();
103                #endif
104    
105              while (!queue.empty()) {              while (!queue.empty()) {
106                  command_t cmd;                  command_t cmd;
107    
108                  // grab a new command from the queue                  // grab a new command from the queue
109                  mutex.Lock();                  mutex.Lock();
110                  cmd = queue.front();                  cmd = queue.front();
111                    queue.pop_front();
112                  mutex.Unlock();                  mutex.Unlock();
113    
114                  try {                  try {
115                      switch (cmd.type) {                      switch (cmd.type) {
116                          case command_t::DIRECT_LOAD:                          case command_t::DIRECT_LOAD:
117                                EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, false);
118                                cmd.pEngineChannel->PrepareLoadInstrument(cmd.instrumentId.FileName.c_str(), cmd.instrumentId.Index);
119                              cmd.pEngineChannel->LoadInstrument();                              cmd.pEngineChannel->LoadInstrument();
120                                EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
121                              break;                              break;
122                          case command_t::INSTR_MODE:                          case command_t::INSTR_MODE:
123                              cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);                              cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);
# Line 109  namespace LinuxSampler { Line 127  namespace LinuxSampler {
127                      }                      }
128                  } catch (Exception e) {                  } catch (Exception e) {
129                      e.PrintMessage();                      e.PrintMessage();
130                        if (cmd.type == command_t::DIRECT_LOAD) {
131                            EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
132                        }
133                  } catch (...) {                  } catch (...) {
134                      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;
135                        if (cmd.type == command_t::DIRECT_LOAD) {
136                            EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, true);
137                        }
138                  }                  }
   
                 // remove processed command from queue  
                 mutex.Lock();  
                 queue.pop_front();  
                 mutex.Unlock();  
139              }              }
140    
141              // nothing left to do, sleep until new jobs arrive              // nothing left to do, sleep until new jobs arrive
# Line 126  namespace LinuxSampler { Line 145  namespace LinuxSampler {
145              // unlock condition object so it can be turned again by other thread              // unlock condition object so it can be turned again by other thread
146              conditionJobsLeft.Unlock();              conditionJobsLeft.Unlock();
147          }          }
148            return 0;
149        }
150    
151        void InstrumentManagerThread::EventHandler::ChannelToBeRemoved(SamplerChannel* pChannel) {
152            /*
153               Removing from the queue an eventual scheduled loading of an instrument
154               to a sampler channel which is going to be removed.
155            */
156            pThread->mutex.Lock();
157            std::list<command_t>::iterator it;
158            for (it = pThread->queue.begin(); it != pThread->queue.end();){
159                if ((*it).type != command_t::DIRECT_LOAD) { ++it; continue; }
160                if ((*it).pEngineChannel == pChannel->GetEngineChannel()) {
161                    it = pThread->queue.erase(it);
162                    // we don't break here because the same engine channel could
163                    // occur more than once in the queue, so don't make optimizations
164                } else {
165                    ++it;
166                }
167            }
168            pThread->mutex.Unlock();
169        }
170    
171    #ifdef __APPLE__
172        int InstrumentManagerThread::StopThread() {
173            // This is a fix for Mac OS X, where SignalStopThread doesn't
174            // wake up a thread waiting for a condition variable.
175            SignalStopThread(); // send stop signal, but don't wait
176            conditionJobsLeft.Set(true); // wake thread
177            return Thread::StopThread(); // then wait for it to cancel
178        }
179    #endif
180    
181    #ifdef WIN32
182        int InstrumentManagerThread::StopThread() {
183            int res = Thread::StopThread();
184            conditionJobsLeft.Reset();
185            return res;
186      }      }
187    #endif
188    
189  } // namespace LinuxSampler  } // namespace LinuxSampler
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