8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef SHARE_GC_Z_ZLOCK_INLINE_HPP
25 #define SHARE_GC_Z_ZLOCK_INLINE_HPP
26
27 #include "gc/z/zLock.hpp"
28
29 inline ZLock::ZLock() {
30 pthread_mutex_init(&_lock, NULL);
31 }
32
33 inline void ZLock::lock() {
34 pthread_mutex_lock(&_lock);
35 }
36
37 inline bool ZLock::try_lock() {
38 return pthread_mutex_trylock(&_lock) == 0;
39 }
40
41 inline void ZLock::unlock() {
42 pthread_mutex_unlock(&_lock);
43 }
44
45 inline ZLocker::ZLocker(ZLock* lock) :
46 _lock(lock) {
47 _lock->lock();
48 }
49
50 inline ZLocker::~ZLocker() {
51 _lock->unlock();
52 }
53
54 #endif // SHARE_GC_Z_ZLOCK_INLINE_HPP
|
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef SHARE_GC_Z_ZLOCK_INLINE_HPP
25 #define SHARE_GC_Z_ZLOCK_INLINE_HPP
26
27 #include "gc/z/zLock.hpp"
28 #include "runtime/atomic.hpp"
29 #include "runtime/thread.hpp"
30 #include "utilities/debug.hpp"
31
32 inline ZLock::ZLock() {
33 pthread_mutex_init(&_lock, NULL);
34 }
35
36 inline ZLock::~ZLock() {
37 pthread_mutex_destroy(&_lock);
38 }
39
40 inline void ZLock::lock() {
41 pthread_mutex_lock(&_lock);
42 }
43
44 inline bool ZLock::try_lock() {
45 return pthread_mutex_trylock(&_lock) == 0;
46 }
47
48 inline void ZLock::unlock() {
49 pthread_mutex_unlock(&_lock);
50 }
51
52 inline ZReentrantLock::ZReentrantLock() :
53 _lock(),
54 _owner(NULL),
55 _count(0) {}
56
57 inline void ZReentrantLock::lock() {
58 Thread* const thread = Thread::current();
59 Thread* const owner = Atomic::load(&_owner);
60
61 if (owner != thread) {
62 _lock.lock();
63 Atomic::store(thread, &_owner);
64 }
65
66 _count++;
67 }
68
69 inline void ZReentrantLock::unlock() {
70 assert(is_owned(), "Invalid owner");
71 assert(_count > 0, "Invalid count");
72
73 _count--;
74
75 if (_count == 0) {
76 Atomic::store((Thread*)NULL, &_owner);
77 _lock.unlock();
78 }
79 }
80
81 inline bool ZReentrantLock::is_owned() const {
82 Thread* const thread = Thread::current();
83 Thread* const owner = Atomic::load(&_owner);
84 return owner == thread;
85 }
86
87 template <typename T>
88 inline ZLocker<T>::ZLocker(T* lock) :
89 _lock(lock) {
90 _lock->lock();
91 }
92
93 template <typename T>
94 inline ZLocker<T>::~ZLocker() {
95 _lock->unlock();
96 }
97
98 #endif // SHARE_GC_Z_ZLOCK_INLINE_HPP
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