34 // require these closure objects to be stack-allocated. |
34 // require these closure objects to be stack-allocated. |
35 class CardTableEntryClosure: public CHeapObj<mtGC> { |
35 class CardTableEntryClosure: public CHeapObj<mtGC> { |
36 public: |
36 public: |
37 // Process the card whose card table entry is "card_ptr". If returns |
37 // Process the card whose card table entry is "card_ptr". If returns |
38 // "false", terminate the iteration early. |
38 // "false", terminate the iteration early. |
39 virtual bool do_card_ptr(jbyte* card_ptr, int worker_i = 0) = 0; |
39 virtual bool do_card_ptr(jbyte* card_ptr, uint worker_i = 0) = 0; |
40 }; |
40 }; |
41 |
41 |
42 // A ptrQueue whose elements are "oops", pointers to object heads. |
42 // A ptrQueue whose elements are "oops", pointers to object heads. |
43 class DirtyCardQueue: public PtrQueue { |
43 class DirtyCardQueue: public PtrQueue { |
44 public: |
44 public: |
51 // buffer empty. If a closure application returns "false", return |
51 // buffer empty. If a closure application returns "false", return |
52 // "false" immediately, halting the iteration. If "consume" is true, |
52 // "false" immediately, halting the iteration. If "consume" is true, |
53 // deletes processed entries from logs. |
53 // deletes processed entries from logs. |
54 bool apply_closure(CardTableEntryClosure* cl, |
54 bool apply_closure(CardTableEntryClosure* cl, |
55 bool consume = true, |
55 bool consume = true, |
56 size_t worker_i = 0); |
56 uint worker_i = 0); |
57 |
57 |
58 // Apply the closure to all elements of "buf", down to "index" |
58 // Apply the closure to all elements of "buf", down to "index" |
59 // (inclusive.) If returns "false", then a closure application returned |
59 // (inclusive.) If returns "false", then a closure application returned |
60 // "false", and we return immediately. If "consume" is true, entries are |
60 // "false", and we return immediately. If "consume" is true, entries are |
61 // set to NULL as they are processed, so they will not be processed again |
61 // set to NULL as they are processed, so they will not be processed again |
62 // later. |
62 // later. |
63 static bool apply_closure_to_buffer(CardTableEntryClosure* cl, |
63 static bool apply_closure_to_buffer(CardTableEntryClosure* cl, |
64 void** buf, size_t index, size_t sz, |
64 void** buf, size_t index, size_t sz, |
65 bool consume = true, |
65 bool consume = true, |
66 int worker_i = 0); |
66 uint worker_i = 0); |
67 void **get_buf() { return _buf;} |
67 void **get_buf() { return _buf;} |
68 void set_buf(void **buf) {_buf = buf;} |
68 void set_buf(void **buf) {_buf = buf;} |
69 size_t get_index() { return _index;} |
69 size_t get_index() { return _index;} |
70 void reinitialize() { _buf = 0; _sz = 0; _index = 0;} |
70 void reinitialize() { _buf = 0; _sz = 0; _index = 0;} |
71 }; |
71 }; |
96 int max_completed_queue, |
96 int max_completed_queue, |
97 Mutex* lock, PtrQueueSet* fl_owner = NULL); |
97 Mutex* lock, PtrQueueSet* fl_owner = NULL); |
98 |
98 |
99 // The number of parallel ids that can be claimed to allow collector or |
99 // The number of parallel ids that can be claimed to allow collector or |
100 // mutator threads to do card-processing work. |
100 // mutator threads to do card-processing work. |
101 static size_t num_par_ids(); |
101 static uint num_par_ids(); |
102 |
102 |
103 static void handle_zero_index_for_thread(JavaThread* t); |
103 static void handle_zero_index_for_thread(JavaThread* t); |
104 |
104 |
105 // Register "blk" as "the closure" for all queues. Only one such closure |
105 // Register "blk" as "the closure" for all queues. Only one such closure |
106 // is allowed. The "apply_closure_to_completed_buffer" method will apply |
106 // is allowed. The "apply_closure_to_completed_buffer" method will apply |
113 // in all currently-active buffers. This should only be applied at a |
113 // in all currently-active buffers. This should only be applied at a |
114 // safepoint. (Currently must not be called in parallel; this should |
114 // safepoint. (Currently must not be called in parallel; this should |
115 // change in the future.) If "consume" is true, processed entries are |
115 // change in the future.) If "consume" is true, processed entries are |
116 // discarded. |
116 // discarded. |
117 void iterate_closure_all_threads(bool consume = true, |
117 void iterate_closure_all_threads(bool consume = true, |
118 size_t worker_i = 0); |
118 uint worker_i = 0); |
119 |
119 |
120 // If there exists some completed buffer, pop it, then apply the |
120 // If there exists some completed buffer, pop it, then apply the |
121 // registered closure to all its elements, nulling out those elements |
121 // registered closure to all its elements, nulling out those elements |
122 // processed. If all elements are processed, returns "true". If no |
122 // processed. If all elements are processed, returns "true". If no |
123 // completed buffers exist, returns false. If a completed buffer exists, |
123 // completed buffers exist, returns false. If a completed buffer exists, |
124 // but is only partially completed before a "yield" happens, the |
124 // but is only partially completed before a "yield" happens, the |
125 // partially completed buffer (with its processed elements set to NULL) |
125 // partially completed buffer (with its processed elements set to NULL) |
126 // is returned to the completed buffer set, and this call returns false. |
126 // is returned to the completed buffer set, and this call returns false. |
127 bool apply_closure_to_completed_buffer(int worker_i = 0, |
127 bool apply_closure_to_completed_buffer(uint worker_i = 0, |
128 int stop_at = 0, |
128 int stop_at = 0, |
129 bool during_pause = false); |
129 bool during_pause = false); |
130 |
130 |
131 // If there exists some completed buffer, pop it, then apply the |
131 // If there exists some completed buffer, pop it, then apply the |
132 // specified closure to all its elements, nulling out those elements |
132 // specified closure to all its elements, nulling out those elements |
134 // completed buffers exist, returns false. If a completed buffer exists, |
134 // completed buffers exist, returns false. If a completed buffer exists, |
135 // but is only partially completed before a "yield" happens, the |
135 // but is only partially completed before a "yield" happens, the |
136 // partially completed buffer (with its processed elements set to NULL) |
136 // partially completed buffer (with its processed elements set to NULL) |
137 // is returned to the completed buffer set, and this call returns false. |
137 // is returned to the completed buffer set, and this call returns false. |
138 bool apply_closure_to_completed_buffer(CardTableEntryClosure* cl, |
138 bool apply_closure_to_completed_buffer(CardTableEntryClosure* cl, |
139 int worker_i = 0, |
139 uint worker_i = 0, |
140 int stop_at = 0, |
140 int stop_at = 0, |
141 bool during_pause = false); |
141 bool during_pause = false); |
142 |
142 |
143 // Helper routine for the above. |
143 // Helper routine for the above. |
144 bool apply_closure_to_completed_buffer_helper(CardTableEntryClosure* cl, |
144 bool apply_closure_to_completed_buffer_helper(CardTableEntryClosure* cl, |
145 int worker_i, |
145 uint worker_i, |
146 BufferNode* nd); |
146 BufferNode* nd); |
147 |
147 |
148 BufferNode* get_completed_buffer(int stop_at); |
148 BufferNode* get_completed_buffer(int stop_at); |
149 |
149 |
150 // Applies the current closure to all completed buffers, |
150 // Applies the current closure to all completed buffers, |