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
25 #ifndef SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
26 #define SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
27
28 #include "runtime/objectMonitor.hpp"
29
30 #include "logging/log.hpp"
31 #include "oops/access.inline.hpp"
32 #include "runtime/atomic.hpp"
33 #include "runtime/lockStack.inline.hpp"
34 #include "runtime/synchronizer.hpp"
35
36 inline bool ObjectMonitor::is_entered(JavaThread* current) const {
37 if (LockingMode == LM_LIGHTWEIGHT) {
38 if (is_owner_anonymous()) {
39 return current->lock_stack().contains(object());
40 } else {
41 return current == owner_raw();
42 }
43 } else {
44 void* owner = owner_raw();
45 if (current == owner || current->is_lock_owned((address)owner)) {
46 return true;
47 }
48 }
49 return false;
50 }
51
52 inline markWord ObjectMonitor::header() const {
53 return Atomic::load(&_header);
54 }
55
56 inline volatile markWord* ObjectMonitor::header_addr() {
57 return &_header;
58 }
59
60 inline void ObjectMonitor::set_header(markWord hdr) {
61 Atomic::store(&_header, hdr);
62 }
63
64 inline int ObjectMonitor::waiters() const {
65 return _waiters;
66 }
67
68 inline bool ObjectMonitor::has_owner() const {
69 void* owner = owner_raw();
70 return owner != nullptr && owner != DEFLATER_MARKER;
71 }
72
73 // Returns null if DEFLATER_MARKER is observed.
74 inline void* ObjectMonitor::owner() const {
75 void* owner = owner_raw();
76 return owner != DEFLATER_MARKER ? owner : nullptr;
77 }
78
79 inline void* ObjectMonitor::owner_raw() const {
80 return Atomic::load(&_owner);
81 }
163 ", new=" INTPTR_FORMAT, p2i(this),
164 p2i(prev), p2i(new_value));
165 }
166 return prev;
167 }
168
169 // The _next_om field can be concurrently read and modified so we
170 // use Atomic operations to disable compiler optimizations that
171 // might try to elide loading and/or storing this field.
172
173 // Simply get _next_om field.
174 inline ObjectMonitor* ObjectMonitor::next_om() const {
175 return Atomic::load(&_next_om);
176 }
177
178 // Simply set _next_om field to new_value.
179 inline void ObjectMonitor::set_next_om(ObjectMonitor* new_value) {
180 Atomic::store(&_next_om, new_value);
181 }
182
183 #endif // SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
|
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
25 #ifndef SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
26 #define SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
27
28 #include "runtime/objectMonitor.hpp"
29
30 #include "logging/log.hpp"
31 #include "oops/access.inline.hpp"
32 #include "oops/markWord.hpp"
33 #include "runtime/atomic.hpp"
34 #include "runtime/globals.hpp"
35 #include "runtime/lockStack.inline.hpp"
36 #include "runtime/synchronizer.hpp"
37 #include "utilities/checkedCast.hpp"
38 #include "utilities/globalDefinitions.hpp"
39
40 inline bool ObjectMonitor::is_entered(JavaThread* current) const {
41 if (LockingMode == LM_LIGHTWEIGHT) {
42 if (is_owner_anonymous()) {
43 return current->lock_stack().contains(object());
44 } else {
45 return current == owner_raw();
46 }
47 } else {
48 void* owner = owner_raw();
49 if (current == owner || current->is_lock_owned((address)owner)) {
50 return true;
51 }
52 }
53 return false;
54 }
55
56 inline uintptr_t ObjectMonitor::metadata() const {
57 return Atomic::load(&_metadata);
58 }
59
60 inline void ObjectMonitor::set_metadata(uintptr_t value) {
61 Atomic::store(&_metadata, value);
62 }
63
64 inline volatile uintptr_t* ObjectMonitor::metadata_addr() {
65 STATIC_ASSERT(std::is_standard_layout<ObjectMonitor>::value);
66 STATIC_ASSERT(offsetof(ObjectMonitor, _metadata) == 0);
67 return &_metadata;
68 }
69
70 inline markWord ObjectMonitor::header() const {
71 assert(!UseObjectMonitorTable, "Lightweight locking with OM table does not use header");
72 return markWord(metadata());
73 }
74
75 inline void ObjectMonitor::set_header(markWord hdr) {
76 assert(!UseObjectMonitorTable, "Lightweight locking with OM table does not use header");
77 set_metadata(hdr.value());
78 }
79
80 inline intptr_t ObjectMonitor::hash() const {
81 assert(UseObjectMonitorTable, "Only used by lightweight locking with OM table");
82 return metadata();
83 }
84
85 inline void ObjectMonitor::set_hash(intptr_t hash) {
86 assert(UseObjectMonitorTable, "Only used by lightweight locking with OM table");
87 set_metadata(hash);
88 }
89
90 inline int ObjectMonitor::waiters() const {
91 return _waiters;
92 }
93
94 inline bool ObjectMonitor::has_owner() const {
95 void* owner = owner_raw();
96 return owner != nullptr && owner != DEFLATER_MARKER;
97 }
98
99 // Returns null if DEFLATER_MARKER is observed.
100 inline void* ObjectMonitor::owner() const {
101 void* owner = owner_raw();
102 return owner != DEFLATER_MARKER ? owner : nullptr;
103 }
104
105 inline void* ObjectMonitor::owner_raw() const {
106 return Atomic::load(&_owner);
107 }
189 ", new=" INTPTR_FORMAT, p2i(this),
190 p2i(prev), p2i(new_value));
191 }
192 return prev;
193 }
194
195 // The _next_om field can be concurrently read and modified so we
196 // use Atomic operations to disable compiler optimizations that
197 // might try to elide loading and/or storing this field.
198
199 // Simply get _next_om field.
200 inline ObjectMonitor* ObjectMonitor::next_om() const {
201 return Atomic::load(&_next_om);
202 }
203
204 // Simply set _next_om field to new_value.
205 inline void ObjectMonitor::set_next_om(ObjectMonitor* new_value) {
206 Atomic::store(&_next_om, new_value);
207 }
208
209 inline ObjectMonitorContentionMark::ObjectMonitorContentionMark(ObjectMonitor* monitor)
210 : _monitor(monitor) {
211 _monitor->add_to_contentions(1);
212 }
213
214 inline ObjectMonitorContentionMark::~ObjectMonitorContentionMark() {
215 _monitor->add_to_contentions(-1);
216 }
217
218 inline oop ObjectMonitor::object_peek() const {
219 if (_object.is_null()) {
220 return nullptr;
221 }
222 return _object.peek();
223 }
224
225 inline bool ObjectMonitor::object_is_dead() const {
226 return object_peek() == nullptr;
227 }
228
229 inline bool ObjectMonitor::object_is_cleared() const {
230 return _object.is_null();
231 }
232
233 inline bool ObjectMonitor::object_refers_to(oop obj) const {
234 if (_object.is_null()) {
235 return false;
236 }
237 return _object.peek() == obj;
238 }
239
240 #endif // SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
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