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fbafef11c0
Make MutexLocker be MutexLockerEx implementation, remove MutexLockerEx calls. Reviewed-by: dcubed, dholmes, pliden, rehn
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/*
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* Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc/shared/concurrentGCThread.hpp"
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#include "runtime/init.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/orderAccess.hpp"
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#include "runtime/os.hpp"
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ConcurrentGCThread::ConcurrentGCThread() :
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_should_terminate(false),
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_has_terminated(false) {}
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void ConcurrentGCThread::create_and_start(ThreadPriority prio) {
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if (os::create_thread(this, os::cgc_thread)) {
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os::set_priority(this, prio);
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os::start_thread(this);
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}
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}
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void ConcurrentGCThread::run() {
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// Setup handle area
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set_active_handles(JNIHandleBlock::allocate_block());
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// Wait for initialization to complete
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wait_init_completed();
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run_service();
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// Signal thread has terminated
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MonitorLocker ml(Terminator_lock);
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OrderAccess::release_store(&_has_terminated, true);
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ml.notify_all();
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}
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void ConcurrentGCThread::stop() {
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assert(!should_terminate(), "Invalid state");
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assert(!has_terminated(), "Invalid state");
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// Signal thread to terminate
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OrderAccess::release_store_fence(&_should_terminate, true);
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stop_service();
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// Wait for thread to terminate
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MonitorLocker ml(Terminator_lock);
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while (!_has_terminated) {
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ml.wait();
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}
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}
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bool ConcurrentGCThread::should_terminate() const {
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return OrderAccess::load_acquire(&_should_terminate);
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}
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bool ConcurrentGCThread::has_terminated() const {
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return OrderAccess::load_acquire(&_has_terminated);
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}
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