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

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revision 947 by schoenebeck, Mon Nov 27 21:34:55 2006 UTC revision 2185 by persson, Sun Jun 19 09:09:38 2011 UTC
# Line 1  Line 1 
1  /***************************************************************************  /***************************************************************************
2   *                                                                         *   *                                                                         *
3   *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *   *   Copyright (C) 2005 - 2007 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 20  Line 20 
20    
21  #include "InstrumentManagerThread.h"  #include "InstrumentManagerThread.h"
22    
23    #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          pQueue = new RingBuffer<command_t>(INSTRUMENT_LOADER_QUEUE_SIZE);          eventHandler.pThread = this;
30      }      }
31    
32      InstrumentManagerThread::~InstrumentManagerThread() {      InstrumentManagerThread::~InstrumentManagerThread() {
         if (pQueue) delete pQueue;  
33      }      }
34    
35      /**      /**
# Line 42  namespace LinuxSampler { Line 44  namespace LinuxSampler {
44       * @param pEngineChannel - engine channel on which the instrument should be loaded       * @param pEngineChannel - engine channel on which the instrument should be loaded
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).",Filename.c_str(),uiInstrumentIndex));          dmsg(1,("Scheduling '%s' (Index=%d) to be loaded in background (if not loaded yet).\n",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          // already tell the engine which instrument to load          // already tell the engine which instrument to load
57          pEngineChannel->PrepareLoadInstrument(Filename.c_str(), uiInstrumentIndex);          pEngineChannel->PrepareLoadInstrument(Filename.c_str(), uiInstrumentIndex);
58    
59          command_t cmd;          command_t cmd;
60          cmd.type           = command_t::DIRECT_LOAD;          cmd.type           = command_t::DIRECT_LOAD;
61          cmd.pEngineChannel = pEngineChannel;          cmd.pEngineChannel = pEngineChannel;
62          pQueue->push(&cmd);  
63            mutex.Lock();
64            queue.push_back(cmd);
65            mutex.Unlock();
66    
67          StartThread(); // ensure thread is running          StartThread(); // ensure thread is running
68          conditionJobsLeft.Set(true); // wake up thread          conditionJobsLeft.Set(true); // wake up thread
69      }      }
# Line 72  namespace LinuxSampler { Line 86  namespace LinuxSampler {
86          cmd.pManager     = pManager;          cmd.pManager     = pManager;
87          cmd.instrumentId = ID;          cmd.instrumentId = ID;
88          cmd.mode         = Mode;          cmd.mode         = Mode;
89          pQueue->push(&cmd);  
90            mutex.Lock();
91            queue.push_back(cmd);
92            mutex.Unlock();
93    
94          StartThread(); // ensure thread is running          StartThread(); // ensure thread is running
95          conditionJobsLeft.Set(true); // wake up thread          conditionJobsLeft.Set(true); // wake up thread
96      }      }
# Line 80  namespace LinuxSampler { Line 98  namespace LinuxSampler {
98      // Entry point for the task thread.      // Entry point for the task thread.
99      int InstrumentManagerThread::Main() {      int InstrumentManagerThread::Main() {
100          while (true) {          while (true) {
101              while (pQueue->read_space()) {  
102                #if CONFIG_PTHREAD_TESTCANCEL
103                TestCancel();
104                #endif
105    
106                while (!queue.empty()) {
107                  command_t cmd;                  command_t cmd;
108                  pQueue->pop(&cmd);  
109                    // grab a new command from the queue
110                    mutex.Lock();
111                    cmd = queue.front();
112                    queue.pop_front();
113                    mutex.Unlock();
114    
115                  try {                  try {
116                      switch (cmd.type) {                      switch (cmd.type) {
117                          case command_t::DIRECT_LOAD:                          case command_t::DIRECT_LOAD:
118                                EngineChannelFactory::SetDeleteEnabled(cmd.pEngineChannel, false);
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 94  namespace LinuxSampler { Line 125  namespace LinuxSampler {
125                          default:                          default:
126                              std::cerr << "InstrumentManagerThread: unknown command - BUG!\n" << std::flush;                              std::cerr << "InstrumentManagerThread: unknown command - BUG!\n" << std::flush;
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 (...) {
134                        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                  }                  }
139              }              }
140    
# Line 107  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        int InstrumentManagerThread::StopThread() {
172            // This is a fix for Mac OS X, where SignalStopThread doesn't
173            // wake up a thread waiting for a condition variable.
174            SignalStopThread(); // send stop signal, but don't wait
175            conditionJobsLeft.Set(true); // wake thread
176            return Thread::StopThread(); // then wait for it to cancel
177      }      }
178    
179  } // namespace LinuxSampler  } // namespace LinuxSampler
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