src/common/ConditionServer.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and 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"

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;
}
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	53	* *
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			}