70
71 inline void* ObjectMonitor::object() const {
72 return _object;
73 }
74
75 inline void* ObjectMonitor::object_addr() {
76 return (void *)(&_object);
77 }
78
79 inline void ObjectMonitor::set_object(void* obj) {
80 _object = obj;
81 }
82
83 // return number of threads contending for this monitor
84 inline jint ObjectMonitor::contentions() const {
85 return _contentions;
86 }
87
88 // Clear _owner field; current value must match old_value.
89 inline void ObjectMonitor::release_clear_owner(void* old_value) {
90 void* prev = _owner;
91 assert(prev == old_value, "unexpected prev owner=" INTPTR_FORMAT
92 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(old_value));
93 Atomic::release_store(&_owner, (void*)NULL);
94 log_trace(monitorinflation, owner)("release_clear_owner(): mid="
95 INTPTR_FORMAT ", prev=" INTPTR_FORMAT,
96 p2i(this), p2i(prev));
97 }
98
99 // Simply set _owner field to new_value; current value must match old_value.
100 // (Simple means no memory sync needed.)
101 inline void ObjectMonitor::set_owner_from(void* old_value, void* new_value) {
102 void* prev = _owner;
103 assert(prev == old_value, "unexpected prev owner=" INTPTR_FORMAT
104 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(old_value));
105 _owner = new_value;
106 log_trace(monitorinflation, owner)("set_owner_from(): mid="
107 INTPTR_FORMAT ", prev=" INTPTR_FORMAT
108 ", new=" INTPTR_FORMAT, p2i(this),
109 p2i(prev), p2i(new_value));
110 }
111
112 // Simply set _owner field to self; current value must match basic_lock_p.
113 inline void ObjectMonitor::set_owner_from_BasicLock(void* basic_lock_p, Thread* self) {
114 void* prev = _owner;
115 assert(prev == basic_lock_p, "unexpected prev owner=" INTPTR_FORMAT
116 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(basic_lock_p));
117 // Non-null owner field to non-null owner field is safe without
118 // cmpxchg() as long as all readers can tolerate either flavor.
119 _owner = self;
120 log_trace(monitorinflation, owner)("set_owner_from_BasicLock(): mid="
121 INTPTR_FORMAT ", prev=" INTPTR_FORMAT
122 ", new=" INTPTR_FORMAT ", basic_lock_p="
123 INTPTR_FORMAT, p2i(this), p2i(prev),
124 p2i(self), p2i(basic_lock_p));
125 }
126
127 // Try to set _owner field to new_value if the current value matches
128 // old_value. Otherwise, does not change the _owner field.
129 inline void* ObjectMonitor::try_set_owner_from(void* old_value, void* new_value) {
130 void* prev = Atomic::cmpxchg(&_owner, old_value, new_value);
131 if (prev == old_value) {
132 log_trace(monitorinflation, owner)("try_set_owner_from(): mid="
133 INTPTR_FORMAT ", prev=" INTPTR_FORMAT
134 ", new=" INTPTR_FORMAT, p2i(this),
135 p2i(prev), p2i(new_value));
136 }
137 return prev;
138 }
139
140 #endif // SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
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70
71 inline void* ObjectMonitor::object() const {
72 return _object;
73 }
74
75 inline void* ObjectMonitor::object_addr() {
76 return (void *)(&_object);
77 }
78
79 inline void ObjectMonitor::set_object(void* obj) {
80 _object = obj;
81 }
82
83 // return number of threads contending for this monitor
84 inline jint ObjectMonitor::contentions() const {
85 return _contentions;
86 }
87
88 // Clear _owner field; current value must match old_value.
89 inline void ObjectMonitor::release_clear_owner(void* old_value) {
90 DEBUG_ONLY(void* prev = Atomic::load(&_owner);)
91 assert(prev == old_value, "unexpected prev owner=" INTPTR_FORMAT
92 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(old_value));
93 Atomic::release_store(&_owner, (void*)NULL);
94 log_trace(monitorinflation, owner)("release_clear_owner(): mid="
95 INTPTR_FORMAT ", old_value=" INTPTR_FORMAT,
96 p2i(this), p2i(old_value));
97 }
98
99 // Simply set _owner field to new_value; current value must match old_value.
100 // (Simple means no memory sync needed.)
101 inline void ObjectMonitor::set_owner_from(void* old_value, void* new_value) {
102 DEBUG_ONLY(void* prev = Atomic::load(&_owner);)
103 assert(prev == old_value, "unexpected prev owner=" INTPTR_FORMAT
104 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(old_value));
105 Atomic::store(&_owner, new_value);
106 log_trace(monitorinflation, owner)("set_owner_from(): mid="
107 INTPTR_FORMAT ", old_value=" INTPTR_FORMAT
108 ", new_value=" INTPTR_FORMAT, p2i(this),
109 p2i(old_value), p2i(new_value));
110 }
111
112 // Simply set _owner field to self; current value must match basic_lock_p.
113 inline void ObjectMonitor::set_owner_from_BasicLock(void* basic_lock_p, Thread* self) {
114 DEBUG_ONLY(void* prev = Atomic::load(&_owner);)
115 assert(prev == basic_lock_p, "unexpected prev owner=" INTPTR_FORMAT
116 ", expected=" INTPTR_FORMAT, p2i(prev), p2i(basic_lock_p));
117 // Non-null owner field to non-null owner field is safe without
118 // cmpxchg() as long as all readers can tolerate either flavor.
119 Atomic::store(&_owner, self);
120 log_trace(monitorinflation, owner)("set_owner_from_BasicLock(): mid="
121 INTPTR_FORMAT ", basic_lock_p="
122 INTPTR_FORMAT ", new_value=" INTPTR_FORMAT,
123 p2i(this), p2i(basic_lock_p), p2i(self));
124 }
125
126 // Try to set _owner field to new_value if the current value matches
127 // old_value. Otherwise, does not change the _owner field.
128 inline void* ObjectMonitor::try_set_owner_from(void* old_value, void* new_value) {
129 void* prev = Atomic::cmpxchg(&_owner, old_value, new_value);
130 if (prev == old_value) {
131 log_trace(monitorinflation, owner)("try_set_owner_from(): mid="
132 INTPTR_FORMAT ", prev=" INTPTR_FORMAT
133 ", new=" INTPTR_FORMAT, p2i(this),
134 p2i(prev), p2i(new_value));
135 }
136 return prev;
137 }
138
139 #endif // SHARE_RUNTIME_OBJECTMONITOR_INLINE_HPP
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