/[svn]/linuxsampler/trunk/src/common/ConditionServer.cpp
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Contents of /linuxsampler/trunk/src/common/ConditionServer.cpp

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Revision 53 - (show annotations) (download)
Mon Apr 26 17:15:51 2004 UTC (19 years, 11 months ago) by schoenebeck
File size: 3011 byte(s)
* completely restructured source tree
* implemented multi channel support
* implemented instrument manager, which controls sharing of instruments
  between multiple sampler engines / sampler channels
* created abstract classes 'AudioOutputDevice' and 'MidiInputDevice' for
  convenient implementation of further audio output driver and MIDI input
  driver for LinuxSampler
* implemented following LSCP commands: 'SET CHANNEL MIDI INPUT TYPE',
  'LOAD ENGINE', 'GET CHANNELS', 'ADD CHANNEL', 'REMOVE CHANNEL',
  'SET CHANNEL AUDIO OUTPUT TYPE'
* temporarily removed all command line options
* LSCP server is now launched by default

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20 * MA 02111-1307 USA *
21 ***************************************************************************/
22
23 #include "ConditionServer.h"
24
25 ConditionServer::ConditionServer() {
26 bConditionQuick = false;
27 bChangeRequest = false;
28 bOldCondition = false;
29 }
30
31 bool* ConditionServer::Push(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
32 dmsg(3,("conditionserver:Push() requesting change to %d\n", bCondition));
33 PushMutex.Lock();
34 bOldCondition = bConditionQuick;
35 if (bConditionQuick != bCondition) {
36 bChangeRequest = bCondition;
37 int timeoutexceeded = SyncCondition.WaitAndUnlockIf(bOldCondition, TimeoutSeconds, TimeoutNanoSeconds); // wait until actually condition was changed on Pop() side
38 if (timeoutexceeded) return NULL;
39 }
40 return &bOldCondition;
41 }
42
43 bool* ConditionServer::PushAndUnlock(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
44 bool* pBefore = Push(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
45 Unlock();
46 return pBefore;
47 }
48
49 void ConditionServer::Unlock() {
50 PushMutex.Unlock();
51 }
52
53 bool ConditionServer::GetUnsafe() {
54 return bConditionQuick;
55 }
56
57 bool ConditionServer::Pop() {
58 if (bConditionQuick == bChangeRequest) return bConditionQuick;
59 dmsg(3,("conditionserver:Pop() change requested\n"));
60 bConditionQuick = bChangeRequest;
61 SyncCondition.Set(bChangeRequest);
62 dmsg(3,("conditionserver:Pop() condition now: %d\n", bConditionQuick));
63 return bConditionQuick;
64 }

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