Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/thread/rthread_cond.c	Lines:	0	69	0.0 %
Date:	2017-11-13	Branches:	0	54	0.0 %


/*	$OpenBSD: rthread_cond.c,v 1.4 2017/09/05 02:40:54 guenther Exp $ */
/*
 * Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
 * Copyright (c) 2012 Philip Guenther <guenther@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "rthread.h"
#include "cancel.h"
#include "synch.h"

int
pthread_cond_init(pthread_cond_t *condp, const pthread_condattr_t *attr)
{
	pthread_cond_t cond;

	cond = calloc(1, sizeof(*cond));
	if (cond == NULL)
		return (ENOMEM);

	if (attr == NULL)
		cond->clock = CLOCK_REALTIME;
	else
		cond->clock = (*attr)->ca_clock;
	*condp = cond;

	return (0);
}
DEF_STRONG(pthread_cond_init);

int
pthread_cond_destroy(pthread_cond_t *condp)
{
	pthread_cond_t cond;

	assert(condp != NULL);
	cond = *condp;

	if (cond != NULL) {
		if (cond->mutex != NULL) {
#define MSG "pthread_cond_destroy on condvar with waiters!\n"
			write(2, MSG, sizeof(MSG) - 1);
#undef MSG
			return (EBUSY);
		}
		free(cond);
	}
	*condp = NULL;

	return (0);
}

int
_rthread_cond_timedwait(pthread_cond_t cond, pthread_mutex_t *mutexp,
    const struct timespec *abs)
{
	struct pthread_mutex *mutex = (struct pthread_mutex *)*mutexp;
	struct tib *tib = TIB_GET();
	pthread_t self = tib->tib_thread;
	int error, rv = 0, canceled = 0, mutex_count = 0;
	clockid_t clock = cond->clock;
	int seq = cond->seq;
	PREP_CANCEL_POINT(tib);

	_rthread_debug(5, "%p: cond_timed %p,%p (%p)\n", self,
	    (void *)cond, (void *)mutex, (void *)mutex->owner);

	ENTER_DELAYED_CANCEL_POINT(tib, self);

#if notyet
	/* mark the condvar as being associated with this mutex */
	if (cond->mutex == NULL)
		atomic_cas_ptr(&cond->mutex, NULL, mutex);

	if (cond->mutex != mutex) {
		LEAVE_CANCEL_POINT_INNER(tib, 1);
		return (EINVAL);
	}
#endif

	/* snag the count in case this is a recursive mutex */
	if (mutex->type == PTHREAD_MUTEX_RECURSIVE)
		mutex_count = mutex->count;

	pthread_mutex_unlock(mutexp);

	do {
		/* If ``seq'' wraps you deserve to lose a signal. */
		error = _twait(&cond->seq, seq, clock, abs);
		/*
		* If we took a normal signal (not from cancellation) then
		* we should just go back to sleep without changing state
		* (timeouts, etc).
		*/
	} while ((error == EINTR) &&
	   (tib->tib_canceled == 0 || (tib->tib_cantcancel & CANCEL_DISABLED)));

	/* if timeout or canceled, make note of that */
	if (error == ETIMEDOUT)
		rv = ETIMEDOUT;
	else if (error == EINTR)
		canceled = 1;

	pthread_mutex_lock(mutexp);

	/* restore the mutex's count */
	if (mutex->type == PTHREAD_MUTEX_RECURSIVE)
		mutex->count = mutex_count;

	LEAVE_CANCEL_POINT_INNER(tib, canceled);

	return rv;
}

int
pthread_cond_timedwait(pthread_cond_t *condp, pthread_mutex_t *mutexp,
    const struct timespec *abs)
{
	pthread_cond_t cond;
	int error;

	if (*condp == NULL) {
		if ((error = pthread_cond_init(condp, NULL)))
			return (error);
	}

	cond = *condp;
	if (abs == NULL || abs->tv_sec < 0 || abs->tv_nsec < 0 ||
	    abs->tv_nsec >= 1000000000)
		return (EINVAL);

	return (_rthread_cond_timedwait(cond, mutexp, abs));
}

int
pthread_cond_wait(pthread_cond_t *condp, pthread_mutex_t *mutexp)
{
	pthread_cond_t cond;
	int error;

	if (*condp == NULL) {
		if ((error = pthread_cond_init(condp, NULL)))
			return (error);
	}

	cond = *condp;
	return (_rthread_cond_timedwait(cond, mutexp, NULL));
}

int
pthread_cond_signal(pthread_cond_t *condp)
{
	pthread_cond_t cond;
	int count;

	if (*condp == NULL)
		return (0);

	cond = *condp;

	atomic_inc_int(&cond->seq);
	count = _wake(&cond->seq, 1);

	_rthread_debug(5, "%p: cond_signal %p, %d awaken\n", pthread_self(),
	    (void *)cond, count);

	return (0);
}

int
pthread_cond_broadcast(pthread_cond_t *condp)
{
	pthread_cond_t cond;
	int count;

	if (*condp == NULL)
		return (0);

	cond = *condp;

	atomic_inc_int(&cond->seq);
#if notyet
	count = _requeue(&cond->seq, 1, INT_MAX, &cond->mutex->lock);
#else
	count = _wake(&cond->seq, INT_MAX);
#endif

	_rthread_debug(5, "%p: cond_broadcast %p, %d awaken\n", pthread_self(),
	    (void *)cond, count);

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rthread_cond.c,v 1.4 2017/09/05 02:40:54 guenther Exp $ */
2			/*
3			* Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
4			* Copyright (c) 2012 Philip Guenther <guenther@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <assert.h>
20			#include <errno.h>
21			#include <pthread.h>
22			#include <stdint.h>
23			#include <stdlib.h>
24			#include <string.h>
25			#include <unistd.h>
26
27			#include "rthread.h"
28			#include "cancel.h"
29			#include "synch.h"
30
31			int
32			pthread_cond_init(pthread_cond_t condp, const pthread_condattr_t attr)
33			{
34			pthread_cond_t cond;
35
36			cond = calloc(1, sizeof(*cond));
37			if (cond == NULL)
38			return (ENOMEM);
39
40			if (attr == NULL)
41			cond->clock = CLOCK_REALTIME;
42			else
43			cond->clock = (*attr)->ca_clock;
44			*condp = cond;
45
46			return (0);
47			}
48			DEF_STRONG(pthread_cond_init);
49
50			int
51			pthread_cond_destroy(pthread_cond_t *condp)
52			{
53			pthread_cond_t cond;
54
55			assert(condp != NULL);
56			cond = *condp;
57
58			if (cond != NULL) {
59			if (cond->mutex != NULL) {
60			#define MSG "pthread_cond_destroy on condvar with waiters!\n"
61			write(2, MSG, sizeof(MSG) - 1);
62			#undef MSG
63			return (EBUSY);
64			}
65			free(cond);
66			}
67			*condp = NULL;
68
69			return (0);
70			}
71
72			int
73			_rthread_cond_timedwait(pthread_cond_t cond, pthread_mutex_t *mutexp,
74			const struct timespec *abs)
75			{
76			struct pthread_mutex mutex = (struct pthread_mutex )*mutexp;
77			struct tib *tib = TIB_GET();
78			pthread_t self = tib->tib_thread;
79			int error, rv = 0, canceled = 0, mutex_count = 0;
80			clockid_t clock = cond->clock;
81			int seq = cond->seq;
82			PREP_CANCEL_POINT(tib);
83
84			_rthread_debug(5, "%p: cond_timed %p,%p (%p)\n", self,
85			(void )cond, (void )mutex, (void *)mutex->owner);
86
87			ENTER_DELAYED_CANCEL_POINT(tib, self);
88
89			#if notyet
90			/* mark the condvar as being associated with this mutex */
91			if (cond->mutex == NULL)
92			atomic_cas_ptr(&cond->mutex, NULL, mutex);
93
94			if (cond->mutex != mutex) {
95			LEAVE_CANCEL_POINT_INNER(tib, 1);
96			return (EINVAL);
97			}
98			#endif
99
100			/* snag the count in case this is a recursive mutex */
101			if (mutex->type == PTHREAD_MUTEX_RECURSIVE)
102			mutex_count = mutex->count;
103
104			pthread_mutex_unlock(mutexp);
105
106			do {
107			/* If ``seq'' wraps you deserve to lose a signal. */
108			error = _twait(&cond->seq, seq, clock, abs);
109			/*
110			* If we took a normal signal (not from cancellation) then
111			* we should just go back to sleep without changing state
112			* (timeouts, etc).
113			*/
114			} while ((error == EINTR) &&
115			(tib->tib_canceled == 0 \|\| (tib->tib_cantcancel & CANCEL_DISABLED)));
116
117			/* if timeout or canceled, make note of that */
118			if (error == ETIMEDOUT)
119			rv = ETIMEDOUT;
120			else if (error == EINTR)
121			canceled = 1;
122
123			pthread_mutex_lock(mutexp);
124
125			/* restore the mutex's count */
126			if (mutex->type == PTHREAD_MUTEX_RECURSIVE)
127			mutex->count = mutex_count;
128
129			LEAVE_CANCEL_POINT_INNER(tib, canceled);
130
131			return rv;
132			}
133
134			int
135			pthread_cond_timedwait(pthread_cond_t condp, pthread_mutex_t mutexp,
136			const struct timespec *abs)
137			{
138			pthread_cond_t cond;
139			int error;
140
141			if (*condp == NULL) {
142			if ((error = pthread_cond_init(condp, NULL)))
143			return (error);
144			}
145
146			cond = *condp;
147			if (abs == NULL \|\| abs->tv_sec < 0 \|\| abs->tv_nsec < 0 \|\|
148			abs->tv_nsec >= 1000000000)
149			return (EINVAL);
150
151			return (_rthread_cond_timedwait(cond, mutexp, abs));
152			}
153
154			int
155			pthread_cond_wait(pthread_cond_t condp, pthread_mutex_t mutexp)
156			{
157			pthread_cond_t cond;
158			int error;
159
160			if (*condp == NULL) {
161			if ((error = pthread_cond_init(condp, NULL)))
162			return (error);
163			}
164
165			cond = *condp;
166			return (_rthread_cond_timedwait(cond, mutexp, NULL));
167			}
168
169			int
170			pthread_cond_signal(pthread_cond_t *condp)
171			{
172			pthread_cond_t cond;
173			int count;
174
175			if (*condp == NULL)
176			return (0);
177
178			cond = *condp;
179
180			atomic_inc_int(&cond->seq);
181			count = _wake(&cond->seq, 1);
182
183			_rthread_debug(5, "%p: cond_signal %p, %d awaken\n", pthread_self(),
184			(void *)cond, count);
185
186			return (0);
187			}
188
189			int
190			pthread_cond_broadcast(pthread_cond_t *condp)
191			{
192			pthread_cond_t cond;
193			int count;
194
195			if (*condp == NULL)
196			return (0);
197
198			cond = *condp;
199
200			atomic_inc_int(&cond->seq);
201			#if notyet
202			count = _requeue(&cond->seq, 1, INT_MAX, &cond->mutex->lock);
203			#else
204			count = _wake(&cond->seq, INT_MAX);
205			#endif
206
207			_rthread_debug(5, "%p: cond_broadcast %p, %d awaken\n", pthread_self(),
208			(void *)cond, count);
209
210			return (0);
211			}