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 "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
                timespec timeout;
                timeout.tv_sec  = TimeoutSeconds;
                timeout.tv_nsec = 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
                timespec timeout;
                timeout.tv_sec  = TimeoutSeconds;
                timeout.tv_nsec = 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	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 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 "Condition.h"
24
25	#include "global.h"
26
27	Condition::Condition(bool bInitialCondition) {
28	pthread_cond_init(&__posix_true_condition, NULL);
29	pthread_cond_init(&__posix_false_condition, NULL);
30	bCondition = bInitialCondition;
31	}
32
33	Condition::~Condition() {
34	pthread_cond_destroy(&__posix_true_condition);
35	pthread_cond_destroy(&__posix_false_condition);
36	}
37
38	int Condition::WaitIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
39	dmsg(7,("Condition::Waitif() -> LOCK()\n"));
40	Lock();
41	dmsg(7,("Condition::Waitif() -> LOCK() passed\n"));
42	int res = 0;
43	if (this->bCondition == bCondition) {
44	if (bCondition) { // wait until condition turned 'false'
45	if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
46	timespec timeout;
47	timeout.tv_sec = TimeoutSeconds;
48	timeout.tv_nsec = TimeoutNanoSeconds;
49	dmsg(7,("Condition::Waitif() -> waiting for 'false' condition with timeout\n"));
50	res = pthread_cond_timedwait(&__posix_false_condition, &__posix_mutex, &timeout);
51	dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
52	}
53	else { // wait without timeout
54	dmsg(7,("Condition::Waitif() -> waiting for 'false' condition\n"));
55	pthread_cond_wait(&__posix_false_condition, &__posix_mutex);
56	dmsg(7,("Condition::Waitif() -> awakened from 'false' condition waiting\n"));
57	}
58	}
59	else { // wait until condition turned 'true'
60	if (TimeoutSeconds \|\| TimeoutNanoSeconds) { // wait with timeout
61	timespec timeout;
62	timeout.tv_sec = TimeoutSeconds;
63	timeout.tv_nsec = TimeoutNanoSeconds;
64	dmsg(7,("Condition::Waitif() -> waiting for 'true' condition with timeout\n"));
65	res = pthread_cond_timedwait(&__posix_true_condition, &__posix_mutex, &timeout);
66	dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
67	}
68	else { // wait without timeout
69	dmsg(7,("Condition::Waitif() -> waiting for 'true' condition\n"));
70	pthread_cond_wait(&__posix_true_condition, &__posix_mutex);
71	dmsg(7,("Condition::Waitif() -> awakened from 'true' condition waiting\n"));
72	}
73	}
74	}
75	return res;
76	}
77
78	int Condition::WaitAndUnlockIf(bool bCondition, long TimeoutSeconds, long TimeoutNanoSeconds) {
79	int res = WaitIf(bCondition, TimeoutSeconds, TimeoutNanoSeconds);
80	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK()\n"));
81	Unlock();
82	dmsg(7,("Condition::WaitAndUnlockIf() -> UNLOCK() passed\n"));
83	return res;
84	}
85
86	void Condition::Set(bool bCondition) {
87	dmsg(7,("Condition::Set() -> LOCK()\n"));
88	Lock();
89	dmsg(7,("Condition::Set() -> LOCK() passed\n"));
90	if (this->bCondition != bCondition) {
91	this->bCondition = bCondition;
92	if (bCondition) {
93	dmsg(7,("Condition::Set() -> broadcasting 'true' condition\n"));
94	pthread_cond_broadcast(&__posix_true_condition);
95	}
96	else {
97	dmsg(7,("Condition::Set() -> broadcasting 'false' condition\n"));
98	pthread_cond_broadcast(&__posix_false_condition);
99	}
100	}
101	Unlock();
102	}