1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
8  * Portions of this software were developed by Konstantin Belousov
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
17  *    notice, this list of conditions and the following disclaimer in the
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include "un-namespace.h"
42     "pthread_spinlock is too large for off-page");
53 _pthread_spin_init(pthread_spinlock_t *lock, int pshared)  in _pthread_spin_init()  argument
57 	if (lock == NULL)  in _pthread_spin_init()
64 		*lock = lck;  in _pthread_spin_init()
66 		lck = __thr_pshared_offpage(lock, 1);  in _pthread_spin_init()
69 		*lock = THR_PSHARED_PTR;  in _pthread_spin_init()
73 	_thr_umutex_init(&lck->s_lock);  in _pthread_spin_init()
78 _pthread_spin_destroy(pthread_spinlock_t *lock)  in _pthread_spin_destroy()  argument
83 	if (lock == NULL || *lock == NULL) {  in _pthread_spin_destroy()
85 	} else if (*lock == THR_PSHARED_PTR) {  in _pthread_spin_destroy()
86 		l = __thr_pshared_offpage(lock, 0);  in _pthread_spin_destroy()
91 		free(*lock);  in _pthread_spin_destroy()
92 		*lock = NULL;  in _pthread_spin_destroy()
99 _pthread_spin_trylock(pthread_spinlock_t *lock)  in _pthread_spin_trylock()  argument
103 	if (lock == NULL || *lock == NULL)  in _pthread_spin_trylock()
105 	lck = *lock == THR_PSHARED_PTR ? __thr_pshared_offpage(lock, 0) : *lock;  in _pthread_spin_trylock()
108 	return (THR_UMUTEX_TRYLOCK(_get_curthread(), &lck->s_lock));  in _pthread_spin_trylock()
112 _pthread_spin_lock(pthread_spinlock_t *lock)  in _pthread_spin_lock()  argument
118 	if (lock == NULL)  in _pthread_spin_lock()
120 	lck = *lock == THR_PSHARED_PTR ? __thr_pshared_offpage(lock, 0) : *lock;  in _pthread_spin_lock()
126 	while (THR_UMUTEX_TRYLOCK(curthread, &lck->s_lock) != 0) {  in _pthread_spin_lock()
127 		while (lck->s_lock.m_owner) {  in _pthread_spin_lock()
132 				if (--count <= 0) {  in _pthread_spin_lock()
143 _pthread_spin_unlock(pthread_spinlock_t *lock)  in _pthread_spin_unlock()  argument
147 	if (lock == NULL)  in _pthread_spin_unlock()
149 	lck = *lock == THR_PSHARED_PTR ? __thr_pshared_offpage(lock, 0) : *lock;  in _pthread_spin_unlock()
152 	return (THR_UMUTEX_UNLOCK(_get_curthread(), &lck->s_lock));  in _pthread_spin_unlock()