63
64 // Used only to handle jni locks or other unmatched monitor enter/exit
65 // Internally they will use heavy weight monitor.
66 static void jni_enter (Handle obj, TRAPS);
67 static bool jni_try_enter(Handle obj, Thread* THREAD); // Implements Unsafe.tryMonitorEnter
68 static void jni_exit (oop obj, Thread* THREAD);
69
70 // Handle all interpreter, compiler and jni cases
71 static void wait (Handle obj, jlong millis, TRAPS);
72 static void notify (Handle obj, TRAPS);
73 static void notifyall (Handle obj, TRAPS);
74
75 // Special internal-use-only method for use by JVM infrastructure
76 // that needs to wait() on a java-level object but that can't risk
77 // throwing unexpected InterruptedExecutionExceptions.
78 static void waitUninterruptibly (Handle obj, jlong Millis, Thread * THREAD) ;
79
80 // used by classloading to free classloader object lock,
81 // wait on an internal lock, and reclaim original lock
82 // with original recursion count
83 static intptr_t complete_exit (Handle obj, TRAPS);
84 static void reenter (Handle obj, intptr_t recursion, TRAPS);
85
86 // thread-specific and global objectMonitor free list accessors
87 // static void verifyInUse (Thread * Self) ; too slow for general assert/debug
88 static ObjectMonitor * omAlloc (Thread * Self) ;
89 static void omRelease (Thread * Self, ObjectMonitor * m, bool FromPerThreadAlloc) ;
90 static void omFlush (Thread * Self) ;
91
92 // Inflate light weight monitor to heavy weight monitor
93 static ObjectMonitor* inflate(Thread * Self, oop obj);
94 // This version is only for internal use
95 static ObjectMonitor* inflate_helper(oop obj);
96
97 // Returns the identity hash value for an oop
98 // NOTE: It may cause monitor inflation
99 static intptr_t identity_hash_value_for(Handle obj);
100 static intptr_t FastHashCode (Thread * Self, oop obj) ;
101
102 // java.lang.Thread support
103 static bool current_thread_holds_lock(JavaThread* thread, Handle h_obj);
104 static LockOwnership query_lock_ownership(JavaThread * self, Handle h_obj);
139 // IllegalMonitorStateException. However, a pending exception may
140 // have to pass through, and we must also be able to deal with
141 // asynchronous exceptions. The caller is responsible for checking
142 // the threads pending exception if needed.
143 // doLock was added to support classloading with UnsyncloadClass which
144 // requires flag based choice of locking the classloader lock.
145 class ObjectLocker : public StackObj {
146 private:
147 Thread* _thread;
148 Handle _obj;
149 BasicLock _lock;
150 bool _dolock; // default true
151 public:
152 ObjectLocker(Handle obj, Thread* thread, bool doLock = true);
153 ~ObjectLocker();
154
155 // Monitor behavior
156 void wait (TRAPS) { ObjectSynchronizer::wait (_obj, 0, CHECK); } // wait forever
157 void notify_all(TRAPS) { ObjectSynchronizer::notifyall(_obj, CHECK); }
158 void waitUninterruptibly (TRAPS) { ObjectSynchronizer::waitUninterruptibly (_obj, 0, CHECK);}
159 // complete_exit gives up lock completely, returning recursion count
160 // reenter reclaims lock with original recursion count
161 intptr_t complete_exit(TRAPS) { return ObjectSynchronizer::complete_exit(_obj, CHECK_0); }
162 void reenter(intptr_t recursion, TRAPS) { ObjectSynchronizer::reenter(_obj, recursion, CHECK); }
163 };
164
165 #endif // SHARE_VM_RUNTIME_SYNCHRONIZER_HPP
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63
64 // Used only to handle jni locks or other unmatched monitor enter/exit
65 // Internally they will use heavy weight monitor.
66 static void jni_enter (Handle obj, TRAPS);
67 static bool jni_try_enter(Handle obj, Thread* THREAD); // Implements Unsafe.tryMonitorEnter
68 static void jni_exit (oop obj, Thread* THREAD);
69
70 // Handle all interpreter, compiler and jni cases
71 static void wait (Handle obj, jlong millis, TRAPS);
72 static void notify (Handle obj, TRAPS);
73 static void notifyall (Handle obj, TRAPS);
74
75 // Special internal-use-only method for use by JVM infrastructure
76 // that needs to wait() on a java-level object but that can't risk
77 // throwing unexpected InterruptedExecutionExceptions.
78 static void waitUninterruptibly (Handle obj, jlong Millis, Thread * THREAD) ;
79
80 // used by classloading to free classloader object lock,
81 // wait on an internal lock, and reclaim original lock
82 // with original recursion count
83 static void complete_exit(Handle obj, intptr_t *saved_recursions, intptr_t *saved_trace_exit_stack, TRAPS);
84 static void reenter (Handle obj, intptr_t saved_recursions, intptr_t saved_trace_exit_stack, TRAPS);
85
86 // thread-specific and global objectMonitor free list accessors
87 // static void verifyInUse (Thread * Self) ; too slow for general assert/debug
88 static ObjectMonitor * omAlloc (Thread * Self) ;
89 static void omRelease (Thread * Self, ObjectMonitor * m, bool FromPerThreadAlloc) ;
90 static void omFlush (Thread * Self) ;
91
92 // Inflate light weight monitor to heavy weight monitor
93 static ObjectMonitor* inflate(Thread * Self, oop obj);
94 // This version is only for internal use
95 static ObjectMonitor* inflate_helper(oop obj);
96
97 // Returns the identity hash value for an oop
98 // NOTE: It may cause monitor inflation
99 static intptr_t identity_hash_value_for(Handle obj);
100 static intptr_t FastHashCode (Thread * Self, oop obj) ;
101
102 // java.lang.Thread support
103 static bool current_thread_holds_lock(JavaThread* thread, Handle h_obj);
104 static LockOwnership query_lock_ownership(JavaThread * self, Handle h_obj);
139 // IllegalMonitorStateException. However, a pending exception may
140 // have to pass through, and we must also be able to deal with
141 // asynchronous exceptions. The caller is responsible for checking
142 // the threads pending exception if needed.
143 // doLock was added to support classloading with UnsyncloadClass which
144 // requires flag based choice of locking the classloader lock.
145 class ObjectLocker : public StackObj {
146 private:
147 Thread* _thread;
148 Handle _obj;
149 BasicLock _lock;
150 bool _dolock; // default true
151 public:
152 ObjectLocker(Handle obj, Thread* thread, bool doLock = true);
153 ~ObjectLocker();
154
155 // Monitor behavior
156 void wait (TRAPS) { ObjectSynchronizer::wait (_obj, 0, CHECK); } // wait forever
157 void notify_all(TRAPS) { ObjectSynchronizer::notifyall(_obj, CHECK); }
158 void waitUninterruptibly (TRAPS) { ObjectSynchronizer::waitUninterruptibly (_obj, 0, CHECK);}
159 };
160
161 #endif // SHARE_VM_RUNTIME_SYNCHRONIZER_HPP
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