69
70 // Initialization
71 static void initialize();
72
73 // Debugging
74 static void print_on(outputStream* st);
75 static void print() { print_on(tty); }
76 static void verify();
77 static bool is_local_handle(Thread* thread, jobject handle);
78 static bool is_frame_handle(JavaThread* thr, jobject obj);
79 static bool is_global_handle(jobject handle);
80 static bool is_weak_global_handle(jobject handle);
81 static long global_handle_memory_usage();
82 static long weak_global_handle_memory_usage();
83
84 // Garbage collection support(global handles only, local handles are traversed from thread)
85 // Traversal of regular global handles
86 static void oops_do(OopClosure* f);
87 // Traversal of weak global handles. Unreachable oops are cleared.
88 static void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f);
89 };
90
91
92
93 // JNI handle blocks holding local/global JNI handles
94
95 class JNIHandleBlock : public CHeapObj<mtInternal> {
96 friend class VMStructs;
97 friend class CppInterpreter;
98
99 private:
100 enum SomeConstants {
101 block_size_in_oops = 32 // Number of handles per handle block
102 };
103
104 oop _handles[block_size_in_oops]; // The handles
105 int _top; // Index of next unused handle
106 JNIHandleBlock* _next; // Link to next block
107
108 // The following instance variables are only used by the first block in a chain.
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69
70 // Initialization
71 static void initialize();
72
73 // Debugging
74 static void print_on(outputStream* st);
75 static void print() { print_on(tty); }
76 static void verify();
77 static bool is_local_handle(Thread* thread, jobject handle);
78 static bool is_frame_handle(JavaThread* thr, jobject obj);
79 static bool is_global_handle(jobject handle);
80 static bool is_weak_global_handle(jobject handle);
81 static long global_handle_memory_usage();
82 static long weak_global_handle_memory_usage();
83
84 // Garbage collection support(global handles only, local handles are traversed from thread)
85 // Traversal of regular global handles
86 static void oops_do(OopClosure* f);
87 // Traversal of weak global handles. Unreachable oops are cleared.
88 static void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f);
89 // Traversal of weak global handles.
90 static void weak_oops_do(OopClosure* f);
91 };
92
93
94
95 // JNI handle blocks holding local/global JNI handles
96
97 class JNIHandleBlock : public CHeapObj<mtInternal> {
98 friend class VMStructs;
99 friend class CppInterpreter;
100
101 private:
102 enum SomeConstants {
103 block_size_in_oops = 32 // Number of handles per handle block
104 };
105
106 oop _handles[block_size_in_oops]; // The handles
107 int _top; // Index of next unused handle
108 JNIHandleBlock* _next; // Link to next block
109
110 // The following instance variables are only used by the first block in a chain.
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