src/common/Condition.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 <sys/time.h>

#include "Condition.h"

#include "global.h"

namespace LinuxSampler {

Condition::Condition(bool bInitialCondition) {
    pthread_cond_init(&__posix_true_condition, NULL);
    pthread_cond_init(&__posix_false_condition, NULL);
    bCondition = bInitialCondition;
}

Condition::~Condition() {
    pthread_cond_destroy(&__posix_true_condition);
    pthread_cond_destroy(&__posix_false_condition);
}

int Condition::WaitIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
    dmsg(7,("Condition::Waitif() -> LOCK()\n"));
    Lock();
    dmsg(7,("Condition::Waitif() -> LOCK() passed\n"));
    int res = 0;
    if (this->bCondition == bCondition) {
        if (bCondition) { // wait until condition turned 'false'
            if (TimeoutSeconds || TimeoutNanoSeconds) { // wait with timeout
                struct timeval now;
                gettimeofday(&now, 0);
                timespec timeout;
                timeout.tv_sec  = now.tv_sec + TimeoutSeconds;
                timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
                dmsg(7,("Condition::Waitif() -> waiting for 'false' condition with timeout\n"));
                res = pthread_cond_timedwait(&__posix_false_condition, &__posix_mutex, &timeout);
                dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
            }
            else { // wait without timeout
                dmsg(7,("Condition::Waitif() -> waiting for 'false' condition\n"));
                pthread_cond_wait(&__posix_false_condition, &__posix_mutex);
                dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
            }
        }
        else { // wait until condition turned 'true'
            if (TimeoutSeconds || TimeoutNanoSeconds) { // wait with timeout
                struct timeval now;
                gettimeofday(&now, 0);
                timespec timeout;
                timeout.tv_sec  = now.tv_sec + TimeoutSeconds;
                timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
                dmsg(7,("Condition::Waitif() -> waiting for 'true' condition with timeout\n"));
                res = pthread_cond_timedwait(&__posix_true_condition, &__posix_mutex, &timeout);
                dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
            }
            else { // wait without timeout
                dmsg(7,("Condition::Waitif() -> waiting for 'true' condition\n"));
                pthread_cond_wait(&__posix_true_condition, &__posix_mutex);
                dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
            }
        }
    }
    return res;
}

int Condition::WaitAndUnlockIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
    int res = WaitIf(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
    dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK()\n"));
    Unlock();
    dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK() passed\n"));
    return res;
}

void Condition::Set(bool bCondition) {
    dmsg(7,("Condition::Set() -> LOCK()\n"));
    Lock();
    dmsg(7,("Condition::Set() -> LOCK() passed\n"));
    if (this->bCondition != bCondition) {
        this->bCondition = bCondition;
        if (bCondition) {
            dmsg(7,("Condition::Set() -> broadcasting 'true' condition\n"));
            pthread_cond_broadcast(&__posix_true_condition);
        }
        else {
            dmsg(7,("Condition::Set() -> broadcasting 'false' condition\n"));
            pthread_cond_broadcast(&__posix_false_condition);
        }
    }
    Unlock();
}

} // 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	persson	417	#include <sys/time.h>
25
26	schoenebeck	53	#include "Condition.h"
27
28	schoenebeck	63	#include "global.h"
29
30	schoenebeck	880	namespace LinuxSampler {
31
32	schoenebeck	53	Condition::Condition(bool bInitialCondition) {
33			pthread_cond_init(&__posix_true_condition, NULL);
34			pthread_cond_init(&__posix_false_condition, NULL);
35			bCondition = bInitialCondition;
36			}
37
38			Condition::~Condition() {
39			pthread_cond_destroy(&__posix_true_condition);
40			pthread_cond_destroy(&__posix_false_condition);
41			}
42
43			int Condition::WaitIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
44	schoenebeck	63	dmsg(7,("Condition::Waitif() -> LOCK()\n"));
45	schoenebeck	53	Lock();
46	schoenebeck	63	dmsg(7,("Condition::Waitif() -> LOCK() passed\n"));
47	schoenebeck	53	int res = 0;
48			if (this->bCondition == bCondition) {
49	schoenebeck	63	if (bCondition) { // wait until condition turned 'false'
50			if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
51	persson	417	struct timeval now;
52			gettimeofday(&now, 0);
53	schoenebeck	53	timespec timeout;
54	persson	417	timeout.tv_sec = now.tv_sec + TimeoutSeconds;
55			timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
56	schoenebeck	63	dmsg(7,("Condition::Waitif() -> waiting for 'false' condition with timeout\n"));
57	schoenebeck	53	res = pthread_cond_timedwait(&__posix_false_condition, &__posix_mutex, &timeout);
58	schoenebeck	63	dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
59	schoenebeck	53	}
60	schoenebeck	63	else { // wait without timeout
61			dmsg(7,("Condition::Waitif() -> waiting for 'false' condition\n"));
62			pthread_cond_wait(&__posix_false_condition, &__posix_mutex);
63			dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
64			}
65	schoenebeck	53	}
66	schoenebeck	63	else { // wait until condition turned 'true'
67			if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
68	persson	417	struct timeval now;
69			gettimeofday(&now, 0);
70	schoenebeck	53	timespec timeout;
71	persson	417	timeout.tv_sec = now.tv_sec + TimeoutSeconds;
72			timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
73	schoenebeck	63	dmsg(7,("Condition::Waitif() -> waiting for 'true' condition with timeout\n"));
74	schoenebeck	53	res = pthread_cond_timedwait(&__posix_true_condition, &__posix_mutex, &timeout);
75	schoenebeck	63	dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
76	schoenebeck	53	}
77	schoenebeck	63	else { // wait without timeout
78			dmsg(7,("Condition::Waitif() -> waiting for 'true' condition\n"));
79			pthread_cond_wait(&__posix_true_condition, &__posix_mutex);
80			dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
81			}
82	schoenebeck	53	}
83			}
84			return res;
85			}
86
87			int Condition::WaitAndUnlockIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
88			int res = WaitIf(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
89	schoenebeck	63	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK()\n"));
90	schoenebeck	53	Unlock();
91	schoenebeck	63	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK() passed\n"));
92	schoenebeck	53	return res;
93			}
94
95			void Condition::Set(bool bCondition) {
96	schoenebeck	63	dmsg(7,("Condition::Set() -> LOCK()\n"));
97	schoenebeck	53	Lock();
98	schoenebeck	63	dmsg(7,("Condition::Set() -> LOCK() passed\n"));
99	schoenebeck	53	if (this->bCondition != bCondition) {
100			this->bCondition = bCondition;
101	schoenebeck	63	if (bCondition) {
102			dmsg(7,("Condition::Set() -> broadcasting 'true' condition\n"));
103			pthread_cond_broadcast(&__posix_true_condition);
104			}
105			else {
106			dmsg(7,("Condition::Set() -> broadcasting 'false' condition\n"));
107			pthread_cond_broadcast(&__posix_false_condition);
108			}
109	schoenebeck	53	}
110	schoenebeck	63	Unlock();
111	schoenebeck	53	}
112	schoenebeck	880
113			} // namespace LinuxSampler