ysr@777: /*
ysr@777:  * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
ysr@777:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777:  * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777:  * have any questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
ysr@777: # include "incls/_precompiled.incl"
ysr@777: # include "incls/_satbQueue.cpp.incl"
ysr@777: 
ysr@777: void ObjPtrQueue::apply_closure(ObjectClosure* cl) {
ysr@777:   if (_buf != NULL) {
ysr@777:     apply_closure_to_buffer(cl, _buf, _index, _sz);
ysr@777:     _index = _sz;
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void ObjPtrQueue::apply_closure_to_buffer(ObjectClosure* cl,
ysr@777:                                           void** buf, size_t index, size_t sz) {
ysr@777:   if (cl == NULL) return;
ysr@777:   for (size_t i = index; i < sz; i += oopSize) {
ysr@777:     oop obj = (oop)buf[byte_index_to_index((int)i)];
ysr@777:     // There can be NULL entries because of destructors.
ysr@777:     if (obj != NULL) {
ysr@777:       cl->do_object(obj);
ysr@777:     }
ysr@777:   }
ysr@777: }
ysr@777: #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
ysr@777: #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
ysr@777: #endif // _MSC_VER
ysr@777: 
ysr@777: 
ysr@777: SATBMarkQueueSet::SATBMarkQueueSet() :
ysr@777:   PtrQueueSet(),
ysr@777:   _closure(NULL), _par_closures(NULL),
ysr@777:   _shared_satb_queue(this, true /*perm*/)
ysr@777: {}
ysr@777: 
ysr@777: void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock,
ysr@777:                                   int max_completed_queue,
ysr@777:                                   Mutex* lock) {
ysr@777:   PtrQueueSet::initialize(cbl_mon, fl_lock, max_completed_queue);
ysr@777:   _shared_satb_queue.set_lock(lock);
ysr@777:   if (ParallelGCThreads > 0) {
ysr@777:     _par_closures = NEW_C_HEAP_ARRAY(ObjectClosure*, ParallelGCThreads);
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) {
ysr@777:   t->satb_mark_queue().handle_zero_index();
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::set_active_all_threads(bool b) {
ysr@777:   _all_active = b;
ysr@777:   for(JavaThread* t = Threads::first(); t; t = t->next()) {
ysr@777:     t->satb_mark_queue().set_active(b);
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::set_closure(ObjectClosure* closure) {
ysr@777:   _closure = closure;
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::set_par_closure(int i, ObjectClosure* par_closure) {
ysr@777:   assert(ParallelGCThreads > 0 && _par_closures != NULL, "Precondition");
ysr@777:   _par_closures[i] = par_closure;
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::iterate_closure_all_threads() {
ysr@777:   for(JavaThread* t = Threads::first(); t; t = t->next()) {
ysr@777:     t->satb_mark_queue().apply_closure(_closure);
ysr@777:   }
ysr@777:   shared_satb_queue()->apply_closure(_closure);
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::par_iterate_closure_all_threads(int worker) {
ysr@777:   SharedHeap* sh = SharedHeap::heap();
ysr@777:   int parity = sh->strong_roots_parity();
ysr@777: 
ysr@777:   for(JavaThread* t = Threads::first(); t; t = t->next()) {
ysr@777:     if (t->claim_oops_do(true, parity)) {
ysr@777:       t->satb_mark_queue().apply_closure(_par_closures[worker]);
ysr@777:     }
ysr@777:   }
ysr@777:   // We'll have worker 0 do this one.
ysr@777:   if (worker == 0) {
ysr@777:     shared_satb_queue()->apply_closure(_par_closures[0]);
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: bool SATBMarkQueueSet::apply_closure_to_completed_buffer_work(bool par,
ysr@777:                                                               int worker) {
ysr@777:   CompletedBufferNode* nd = NULL;
ysr@777:   {
ysr@777:     MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
ysr@777:     if (_completed_buffers_head != NULL) {
ysr@777:       nd = _completed_buffers_head;
ysr@777:       _completed_buffers_head = nd->next;
ysr@777:       if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL;
ysr@777:       _n_completed_buffers--;
ysr@777:       if (_n_completed_buffers == 0) _process_completed = false;
ysr@777:     }
ysr@777:   }
ysr@777:   ObjectClosure* cl = (par ? _par_closures[worker] : _closure);
ysr@777:   if (nd != NULL) {
ysr@777:     ObjPtrQueue::apply_closure_to_buffer(cl, nd->buf, 0, _sz);
ysr@777:     deallocate_buffer(nd->buf);
ysr@777:     delete nd;
ysr@777:     return true;
ysr@777:   } else {
ysr@777:     return false;
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void SATBMarkQueueSet::abandon_partial_marking() {
ysr@777:   CompletedBufferNode* buffers_to_delete = NULL;
ysr@777:   {
ysr@777:     MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
ysr@777:     while (_completed_buffers_head != NULL) {
ysr@777:       CompletedBufferNode* nd = _completed_buffers_head;
ysr@777:       _completed_buffers_head = nd->next;
ysr@777:       nd->next = buffers_to_delete;
ysr@777:       buffers_to_delete = nd;
ysr@777:     }
ysr@777:     _completed_buffers_tail = NULL;
ysr@777:     _n_completed_buffers = 0;
ysr@777:     debug_only(assert_completed_buffer_list_len_correct_locked());
ysr@777:   }
ysr@777:   while (buffers_to_delete != NULL) {
ysr@777:     CompletedBufferNode* nd = buffers_to_delete;
ysr@777:     buffers_to_delete = nd->next;
ysr@777:     deallocate_buffer(nd->buf);
ysr@777:     delete nd;
ysr@777:   }
ysr@777:   assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
ysr@777:   // So we can safely manipulate these queues.
ysr@777:   for (JavaThread* t = Threads::first(); t; t = t->next()) {
ysr@777:     t->satb_mark_queue().reset();
ysr@777:   }
ysr@777:   shared_satb_queue()->reset();
ysr@777: }