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_VM_GC_SHARED_CONCURRENTGCTHREAD_HPP
26 #define SHARE_VM_GC_SHARED_CONCURRENTGCTHREAD_HPP
27
28 #include "runtime/thread.hpp"
29 #include "utilities/macros.hpp"
30
31 class ConcurrentGCThread: public NamedThread {
32 friend class VMStructs;
33
34 protected:
35 bool volatile _should_terminate;
36 bool _has_terminated;
37
38 // Create and start the thread (setting it's priority high.)
39 void create_and_start();
40
41 // Do initialization steps in the thread: record stack base and size,
42 // init thread local storage, set JNI handle block.
43 void initialize_in_thread();
44
45 // Wait until Universe::is_fully_initialized();
46 void wait_for_universe_init();
47
48 // Record that the current thread is terminating, and will do more
49 // concurrent work.
50 void terminate();
51
52 public:
53 ConcurrentGCThread();
54
55 // Tester
56 bool is_ConcurrentGC_thread() const { return true; }
57 };
58
59 // The SurrogateLockerThread is used by concurrent GC threads for
60 // manipulating Java monitors, in particular, currently for
61 // manipulating the pending_list_lock. XXX
62 class SurrogateLockerThread: public JavaThread {
63 friend class VMStructs;
64 public:
65 enum SLT_msg_type {
66 empty = 0, // no message
67 acquirePLL, // acquire pending list lock
68 releaseAndNotifyPLL // notify and release pending list lock
69 };
70 private:
71 // the following are shared with the CMSThread
72 SLT_msg_type _buffer; // communication buffer
73 Monitor _monitor; // monitor controlling buffer
74 BasicLock _basicLock; // used for PLL locking
75
76 public:
|
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_VM_GC_SHARED_CONCURRENTGCTHREAD_HPP
26 #define SHARE_VM_GC_SHARED_CONCURRENTGCTHREAD_HPP
27
28 #include "runtime/thread.hpp"
29 #include "utilities/macros.hpp"
30
31 class ConcurrentGCThread: public NamedThread {
32 friend class VMStructs;
33
34 protected:
35 bool volatile _should_terminate;
36 bool _has_terminated;
37
38 // Create and start the thread (setting it's priority.)
39 void create_and_start(ThreadPriority prio = NearMaxPriority);
40
41 // Do initialization steps in the thread: record stack base and size,
42 // init thread local storage, set JNI handle block.
43 void initialize_in_thread();
44
45 // Wait until Universe::is_fully_initialized();
46 void wait_for_universe_init();
47
48 // Record that the current thread is terminating, and will do more
49 // concurrent work.
50 void terminate();
51
52 // Do the specific GC work. Called by run() after initialization complete.
53 virtual void run_service() = 0;
54
55 // Shut down the specific GC work. Called by stop() as part of termination protocol.
56 virtual void stop_service() = 0;
57
58 public:
59 ConcurrentGCThread();
60
61 // Tester
62 bool is_ConcurrentGC_thread() const { return true; }
63
64 virtual void run();
65
66 // shutdown following termination protocol
67 virtual void stop();
68 };
69
70 // The SurrogateLockerThread is used by concurrent GC threads for
71 // manipulating Java monitors, in particular, currently for
72 // manipulating the pending_list_lock. XXX
73 class SurrogateLockerThread: public JavaThread {
74 friend class VMStructs;
75 public:
76 enum SLT_msg_type {
77 empty = 0, // no message
78 acquirePLL, // acquire pending list lock
79 releaseAndNotifyPLL // notify and release pending list lock
80 };
81 private:
82 // the following are shared with the CMSThread
83 SLT_msg_type _buffer; // communication buffer
84 Monitor _monitor; // monitor controlling buffer
85 BasicLock _basicLock; // used for PLL locking
86
87 public:
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