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

#include "Condition.h"

#include "global.h"

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();
}
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	persson	417	#include <sys/time.h>
24
25	schoenebeck	53	#include "Condition.h"
26
27	schoenebeck	63	#include "global.h"
28
29	schoenebeck	53	Condition::Condition(bool bInitialCondition) {
30			pthread_cond_init(&__posix_true_condition, NULL);
31			pthread_cond_init(&__posix_false_condition, NULL);
32			bCondition = bInitialCondition;
33			}
34
35			Condition::~Condition() {
36			pthread_cond_destroy(&__posix_true_condition);
37			pthread_cond_destroy(&__posix_false_condition);
38			}
39
40			int Condition::WaitIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
41	schoenebeck	63	dmsg(7,("Condition::Waitif() -> LOCK()\n"));
42	schoenebeck	53	Lock();
43	schoenebeck	63	dmsg(7,("Condition::Waitif() -> LOCK() passed\n"));
44	schoenebeck	53	int res = 0;
45			if (this->bCondition == bCondition) {
46	schoenebeck	63	if (bCondition) { // wait until condition turned 'false'
47			if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
48	persson	417	struct timeval now;
49			gettimeofday(&now, 0);
50	schoenebeck	53	timespec timeout;
51	persson	417	timeout.tv_sec = now.tv_sec + TimeoutSeconds;
52			timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
53	schoenebeck	63	dmsg(7,("Condition::Waitif() -> waiting for 'false' condition with timeout\n"));
54	schoenebeck	53	res = pthread_cond_timedwait(&__posix_false_condition, &__posix_mutex, &timeout);
55	schoenebeck	63	dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
56	schoenebeck	53	}
57	schoenebeck	63	else { // wait without timeout
58			dmsg(7,("Condition::Waitif() -> waiting for 'false' condition\n"));
59			pthread_cond_wait(&__posix_false_condition, &__posix_mutex);
60			dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
61			}
62	schoenebeck	53	}
63	schoenebeck	63	else { // wait until condition turned 'true'
64			if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
65	persson	417	struct timeval now;
66			gettimeofday(&now, 0);
67	schoenebeck	53	timespec timeout;
68	persson	417	timeout.tv_sec = now.tv_sec + TimeoutSeconds;
69			timeout.tv_nsec = now.tv_usec * 1000 + TimeoutNanoSeconds;
70	schoenebeck	63	dmsg(7,("Condition::Waitif() -> waiting for 'true' condition with timeout\n"));
71	schoenebeck	53	res = pthread_cond_timedwait(&__posix_true_condition, &__posix_mutex, &timeout);
72	schoenebeck	63	dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
73	schoenebeck	53	}
74	schoenebeck	63	else { // wait without timeout
75			dmsg(7,("Condition::Waitif() -> waiting for 'true' condition\n"));
76			pthread_cond_wait(&__posix_true_condition, &__posix_mutex);
77			dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
78			}
79	schoenebeck	53	}
80			}
81			return res;
82			}
83
84			int Condition::WaitAndUnlockIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
85			int res = WaitIf(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
86	schoenebeck	63	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK()\n"));
87	schoenebeck	53	Unlock();
88	schoenebeck	63	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK() passed\n"));
89	schoenebeck	53	return res;
90			}
91
92			void Condition::Set(bool bCondition) {
93	schoenebeck	63	dmsg(7,("Condition::Set() -> LOCK()\n"));
94	schoenebeck	53	Lock();
95	schoenebeck	63	dmsg(7,("Condition::Set() -> LOCK() passed\n"));
96	schoenebeck	53	if (this->bCondition != bCondition) {
97			this->bCondition = bCondition;
98	schoenebeck	63	if (bCondition) {
99			dmsg(7,("Condition::Set() -> broadcasting 'true' condition\n"));
100			pthread_cond_broadcast(&__posix_true_condition);
101			}
102			else {
103			dmsg(7,("Condition::Set() -> broadcasting 'false' condition\n"));
104			pthread_cond_broadcast(&__posix_false_condition);
105			}
106	schoenebeck	53	}
107	schoenebeck	63	Unlock();
108	schoenebeck	53	}