48 typedef enum {
49 owner_self,
50 owner_none,
51 owner_other
52 } LockOwnership;
53
54 typedef enum {
55 inflate_cause_vm_internal = 0,
56 inflate_cause_monitor_enter = 1,
57 inflate_cause_wait = 2,
58 inflate_cause_notify = 3,
59 inflate_cause_hash_code = 4,
60 inflate_cause_jni_enter = 5,
61 inflate_cause_jni_exit = 6,
62 inflate_cause_nof = 7 // Number of causes
63 } InflateCause;
64
65 // exit must be implemented non-blocking, since the compiler cannot easily handle
66 // deoptimization at monitor exit. Hence, it does not take a Handle argument.
67
68 // This is full version of monitor enter and exit. I choose not
69 // to use enter() and exit() in order to make sure user be ware
70 // of the performance and semantics difference. They are normally
71 // used by ObjectLocker etc. The interpreter and compiler use
72 // assembly copies of these routines. Please keep them synchronized.
73 //
74 // attempt_rebias flag is used by UseBiasedLocking implementation
75 static void fast_enter(Handle obj, BasicLock* lock, bool attempt_rebias,
76 TRAPS);
77 static void fast_exit(oop obj, BasicLock* lock, Thread* THREAD);
78
79 // WARNING: They are ONLY used to handle the slow cases. They should
80 // only be used when the fast cases failed. Use of these functions
81 // without previous fast case check may cause fatal error.
82 static void slow_enter(Handle obj, BasicLock* lock, TRAPS);
83 static void slow_exit(oop obj, BasicLock* lock, Thread* THREAD);
84
85 // Used only to handle jni locks or other unmatched monitor enter/exit
86 // Internally they will use heavy weight monitor.
87 static void jni_enter(Handle obj, TRAPS);
88 static void jni_exit(oop obj, Thread* THREAD);
89
90 // Handle all interpreter, compiler and jni cases
91 static int wait(Handle obj, jlong millis, TRAPS);
92 static void notify(Handle obj, TRAPS);
93 static void notifyall(Handle obj, TRAPS);
94
95 static bool quick_notify(oopDesc* obj, Thread* Self, bool All);
96 static bool quick_enter(oop obj, Thread* Self, BasicLock* Lock);
97
98 // Special internal-use-only method for use by JVM infrastructure
99 // that needs to wait() on a java-level object but that can't risk
100 // throwing unexpected InterruptedExecutionExceptions.
101 static void waitUninterruptibly(Handle obj, jlong Millis, Thread * THREAD);
102
103 // used by classloading to free classloader object lock,
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48 typedef enum {
49 owner_self,
50 owner_none,
51 owner_other
52 } LockOwnership;
53
54 typedef enum {
55 inflate_cause_vm_internal = 0,
56 inflate_cause_monitor_enter = 1,
57 inflate_cause_wait = 2,
58 inflate_cause_notify = 3,
59 inflate_cause_hash_code = 4,
60 inflate_cause_jni_enter = 5,
61 inflate_cause_jni_exit = 6,
62 inflate_cause_nof = 7 // Number of causes
63 } InflateCause;
64
65 // exit must be implemented non-blocking, since the compiler cannot easily handle
66 // deoptimization at monitor exit. Hence, it does not take a Handle argument.
67
68 // This is full version of monitor enter and exit.
69 static void enter(Handle obj, BasicLock* lock, TRAPS);
70 static void exit(oop obj, BasicLock* lock, Thread* THREAD);
71
72 // Used only to handle jni locks or other unmatched monitor enter/exit
73 // Internally they will use heavy weight monitor.
74 static void jni_enter(Handle obj, TRAPS);
75 static void jni_exit(oop obj, Thread* THREAD);
76
77 // Handle all interpreter, compiler and jni cases
78 static int wait(Handle obj, jlong millis, TRAPS);
79 static void notify(Handle obj, TRAPS);
80 static void notifyall(Handle obj, TRAPS);
81
82 static bool quick_notify(oopDesc* obj, Thread* Self, bool All);
83 static bool quick_enter(oop obj, Thread* Self, BasicLock* Lock);
84
85 // Special internal-use-only method for use by JVM infrastructure
86 // that needs to wait() on a java-level object but that can't risk
87 // throwing unexpected InterruptedExecutionExceptions.
88 static void waitUninterruptibly(Handle obj, jlong Millis, Thread * THREAD);
89
90 // used by classloading to free classloader object lock,
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