src/common/ConditionServer.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *
 *                                                                         *
 *   This program 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 program 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 program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "ConditionServer.h"

namespace LinuxSampler {

ConditionServer::ConditionServer() {
    bConditionQuick = false;
    bChangeRequest  = false;
    bOldCondition   = false;
}

bool* ConditionServer::Push(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
    dmsg(3,("conditionserver:Push() requesting change to %d\n", bCondition));
    PushMutex.Lock();
    bOldCondition = bConditionQuick;
    if (bConditionQuick != bCondition) {
        bChangeRequest = bCondition;
        int timeoutexceeded = SyncCondition.WaitAndUnlockIf(bOldCondition, TimeoutSeconds, TimeoutNanoSeconds); // wait until actually condition was changed on Pop() side
        if (timeoutexceeded) return NULL;
    }
    return &bOldCondition;
}

bool* ConditionServer::PushAndUnlock(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
    bool* pBefore = Push(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
    Unlock();
    return pBefore;
}

void ConditionServer::Unlock() {
    PushMutex.Unlock();
}

bool ConditionServer::GetUnsafe() {
    return bConditionQuick;
}

bool ConditionServer::Pop() {
    if (bConditionQuick == bChangeRequest) return bConditionQuick;
    dmsg(3,("conditionserver:Pop() change requested\n"));
    bConditionQuick = bChangeRequest;
    SyncCondition.Set(bChangeRequest);
    dmsg(3,("conditionserver:Pop() condition now: %d\n", bConditionQuick));
    return bConditionQuick;
}

} // namespace LinuxSampler
1	schoenebeck	53	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5	schoenebeck	56	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	880	* Copyright (C) 2005, 2006 Christian Schoenebeck *
7	schoenebeck	53	* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "ConditionServer.h"
25
26	schoenebeck	880	namespace LinuxSampler {
27
28	schoenebeck	53	ConditionServer::ConditionServer() {
29			bConditionQuick = false;
30			bChangeRequest = false;
31			bOldCondition = false;
32			}
33
34			bool* ConditionServer::Push(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
35			dmsg(3,("conditionserver:Push() requesting change to %d\n", bCondition));
36			PushMutex.Lock();
37			bOldCondition = bConditionQuick;
38			if (bConditionQuick != bCondition) {
39			bChangeRequest = bCondition;
40			int timeoutexceeded = SyncCondition.WaitAndUnlockIf(bOldCondition, TimeoutSeconds, TimeoutNanoSeconds); // wait until actually condition was changed on Pop() side
41			if (timeoutexceeded) return NULL;
42			}
43			return &bOldCondition;
44			}
45
46			bool* ConditionServer::PushAndUnlock(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
47			bool* pBefore = Push(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
48			Unlock();
49			return pBefore;
50			}
51
52			void ConditionServer::Unlock() {
53			PushMutex.Unlock();
54			}
55
56			bool ConditionServer::GetUnsafe() {
57			return bConditionQuick;
58			}
59
60			bool ConditionServer::Pop() {
61			if (bConditionQuick == bChangeRequest) return bConditionQuick;
62			dmsg(3,("conditionserver:Pop() change requested\n"));
63			bConditionQuick = bChangeRequest;
64			SyncCondition.Set(bChangeRequest);
65			dmsg(3,("conditionserver:Pop() condition now: %d\n", bConditionQuick));
66			return bConditionQuick;
67			}
68	schoenebeck	880
69			} // namespace LinuxSampler