author | pliden |
Mon, 18 Mar 2019 11:50:40 +0100 | |
changeset 54170 | 8f1771ea1e39 |
parent 52653 | ec92cbf2152b |
child 58122 | 48d51def09f9 |
child 58678 | 9cf78a70fa4f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, 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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#ifndef SHARE_GC_Z_ZLOCK_INLINE_HPP |
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#define SHARE_GC_Z_ZLOCK_INLINE_HPP |
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#include "gc/z/zLock.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/thread.hpp" |
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#include "utilities/debug.hpp" |
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inline ZLock::ZLock() { |
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pthread_mutex_init(&_lock, NULL); |
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} |
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inline ZLock::~ZLock() { |
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pthread_mutex_destroy(&_lock); |
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} |
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inline void ZLock::lock() { |
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pthread_mutex_lock(&_lock); |
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} |
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inline bool ZLock::try_lock() { |
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return pthread_mutex_trylock(&_lock) == 0; |
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} |
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inline void ZLock::unlock() { |
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pthread_mutex_unlock(&_lock); |
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} |
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inline ZReentrantLock::ZReentrantLock() : |
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_lock(), |
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_owner(NULL), |
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_count(0) {} |
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inline void ZReentrantLock::lock() { |
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Thread* const thread = Thread::current(); |
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Thread* const owner = Atomic::load(&_owner); |
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if (owner != thread) { |
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_lock.lock(); |
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Atomic::store(thread, &_owner); |
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} |
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_count++; |
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} |
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inline void ZReentrantLock::unlock() { |
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assert(is_owned(), "Invalid owner"); |
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assert(_count > 0, "Invalid count"); |
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_count--; |
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if (_count == 0) { |
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Atomic::store((Thread*)NULL, &_owner); |
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_lock.unlock(); |
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} |
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} |
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inline bool ZReentrantLock::is_owned() const { |
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Thread* const thread = Thread::current(); |
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Thread* const owner = Atomic::load(&_owner); |
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return owner == thread; |
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} |
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template <typename T> |
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inline ZLocker<T>::ZLocker(T* lock) : |
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_lock(lock) { |
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_lock->lock(); |
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} |
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template <typename T> |
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inline ZLocker<T>::~ZLocker() { |
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_lock->unlock(); |
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} |
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#endif // SHARE_GC_Z_ZLOCK_INLINE_HPP |