src/engines/InstrumentManagerThread.cpp

/***************************************************************************
 *                                                                         *
 *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this library; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "InstrumentManagerThread.h"

#include "../common/global_private.h"

namespace LinuxSampler {

    InstrumentManagerThread::InstrumentManagerThread() : Thread(true, false, 0, -4) {
    }

    InstrumentManagerThread::~InstrumentManagerThread() {
    }

    /**
     * @brief Order loading of a new instrument.
     *
     * The request will go into a queue waiting to be processed by the
     * class internal task thread. This method will immediately return and
     * the instrument will be loaded in the background.
     *
     * @param Filename - file name of the instrument
     * @param uiInstrumentIndex - index of the instrument within the file
     * @param pEngineChannel - engine channel on which the instrument should be loaded
     */
    void InstrumentManagerThread::StartNewLoad(String Filename, uint uiInstrumentIndex, EngineChannel* pEngineChannel) {
        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);

        command_t cmd;
        cmd.type           = command_t::DIRECT_LOAD;
        cmd.pEngineChannel = pEngineChannel;

        mutex.Lock();
        queue.push_back(cmd);
        mutex.Unlock();

        StartThread(); // ensure thread is running
        conditionJobsLeft.Set(true); // wake up thread
    }

    /**
     * @brief Order changing the life-time strategy of an instrument.
     *
     * The request will go into a queue waiting to be processed by the
     * class internal task thread. This method will immediately return and
     * in case the instrument has to be loaded due to a mode change to
     * PERSISTENT, it will be loaded in the background.
     *
     * @param pManager - InstrumentManager which manages the instrument
     * @param ID       - unique ID of the instrument
     * @param Mode     - life-time strategy to set for this instrument
     */
    void InstrumentManagerThread::StartSettingMode(InstrumentManager* pManager, const InstrumentManager::instrument_id_t& ID, InstrumentManager::mode_t Mode) {
        command_t cmd;
        cmd.type         = command_t::INSTR_MODE;
        cmd.pManager     = pManager;
        cmd.instrumentId = ID;
        cmd.mode         = Mode;

        mutex.Lock();
        queue.push_back(cmd);
        mutex.Unlock();

        StartThread(); // ensure thread is running
        conditionJobsLeft.Set(true); // wake up thread
    }

    // Entry point for the task thread.
    int InstrumentManagerThread::Main() {
        while (true) {
            while (!queue.empty()) {
                command_t cmd;

                // grab a new command from the queue
                mutex.Lock();
                cmd = queue.front();
                mutex.Unlock();

                try {
                    switch (cmd.type) {
                        case command_t::DIRECT_LOAD:
                            cmd.pEngineChannel->LoadInstrument();
                            break;
                        case command_t::INSTR_MODE:
                            cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);
                            break;
                        default:
                            std::cerr << "InstrumentManagerThread: unknown command - BUG!\n" << std::flush;
                    }
                } catch (Exception e) {
                    e.PrintMessage();
                } catch (...) {
                    std::cerr << "InstrumentManagerThread: some exception occured, could not finish task\n" << std::flush;
                }

                // remove processed command from queue
                mutex.Lock();
                queue.pop_front();
                mutex.Unlock();
            }

            // nothing left to do, sleep until new jobs arrive
            conditionJobsLeft.WaitIf(false);
            // reset flag
            conditionJobsLeft.Set(false);
            // unlock condition object so it can be turned again by other thread
            conditionJobsLeft.Unlock();
        }
    }

} // namespace LinuxSampler
1	/***************************************************************************
2	* *
3	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
4	* *
5	* 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 *
7	* the Free Software Foundation; either version 2 of the License, or *
8	* (at your option) any later version. *
9	* *
10	* This library is distributed in the hope that it will be useful, *
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13	* GNU General Public License for more details. *
14	* *
15	* You should have received a copy of the GNU General Public License *
16	* along with this library; if not, write to the Free Software *
17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
18	* MA 02111-1307 USA *
19	***************************************************************************/
20
21	#include "InstrumentManagerThread.h"
22
23	#include "../common/global_private.h"
24
25	namespace LinuxSampler {
26
27	InstrumentManagerThread::InstrumentManagerThread() : Thread(true, false, 0, -4) {
28	}
29
30	InstrumentManagerThread::~InstrumentManagerThread() {
31	}
32
33	/**
34	* @brief Order loading of a new instrument.
35	*
36	* The request will go into a queue waiting to be processed by the
37	* class internal task thread. This method will immediately return and
38	* the instrument will be loaded in the background.
39	*
40	* @param Filename - file name of the instrument
41	* @param uiInstrumentIndex - index of the instrument within the file
42	* @param pEngineChannel - engine channel on which the instrument should be loaded
43	*/
44	void InstrumentManagerThread::StartNewLoad(String Filename, uint uiInstrumentIndex, EngineChannel* pEngineChannel) {
45	dmsg(1,("Scheduling '%s' (Index=%d) to be loaded in background (if not loaded yet).\n",Filename.c_str(),uiInstrumentIndex));
46	// already tell the engine which instrument to load
47	pEngineChannel->PrepareLoadInstrument(Filename.c_str(), uiInstrumentIndex);
48
49	command_t cmd;
50	cmd.type = command_t::DIRECT_LOAD;
51	cmd.pEngineChannel = pEngineChannel;
52
53	mutex.Lock();
54	queue.push_back(cmd);
55	mutex.Unlock();
56
57	StartThread(); // ensure thread is running
58	conditionJobsLeft.Set(true); // wake up thread
59	}
60
61	/**
62	* @brief Order changing the life-time strategy of an instrument.
63	*
64	* The request will go into a queue waiting to be processed by the
65	* class internal task thread. This method will immediately return and
66	* in case the instrument has to be loaded due to a mode change to
67	* PERSISTENT, it will be loaded in the background.
68	*
69	* @param pManager - InstrumentManager which manages the instrument
70	* @param ID - unique ID of the instrument
71	* @param Mode - life-time strategy to set for this instrument
72	*/
73	void InstrumentManagerThread::StartSettingMode(InstrumentManager* pManager, const InstrumentManager::instrument_id_t& ID, InstrumentManager::mode_t Mode) {
74	command_t cmd;
75	cmd.type = command_t::INSTR_MODE;
76	cmd.pManager = pManager;
77	cmd.instrumentId = ID;
78	cmd.mode = Mode;
79
80	mutex.Lock();
81	queue.push_back(cmd);
82	mutex.Unlock();
83
84	StartThread(); // ensure thread is running
85	conditionJobsLeft.Set(true); // wake up thread
86	}
87
88	// Entry point for the task thread.
89	int InstrumentManagerThread::Main() {
90	while (true) {
91	while (!queue.empty()) {
92	command_t cmd;
93
94	// grab a new command from the queue
95	mutex.Lock();
96	cmd = queue.front();
97	mutex.Unlock();
98
99	try {
100	switch (cmd.type) {
101	case command_t::DIRECT_LOAD:
102	cmd.pEngineChannel->LoadInstrument();
103	break;
104	case command_t::INSTR_MODE:
105	cmd.pManager->SetMode(cmd.instrumentId, cmd.mode);
106	break;
107	default:
108	std::cerr << "InstrumentManagerThread: unknown command - BUG!\n" << std::flush;
109	}
110	} catch (Exception e) {
111	e.PrintMessage();
112	} catch (...) {
113	std::cerr << "InstrumentManagerThread: some exception occured, could not finish task\n" << std::flush;
114	}
115
116	// remove processed command from queue
117	mutex.Lock();
118	queue.pop_front();
119	mutex.Unlock();
120	}
121
122	// nothing left to do, sleep until new jobs arrive
123	conditionJobsLeft.WaitIf(false);
124	// reset flag
125	conditionJobsLeft.Set(false);
126	// unlock condition object so it can be turned again by other thread
127	conditionJobsLeft.Unlock();
128	}
129	}
130
131	} // namespace LinuxSampler