| /* |
| * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef SHARE_GC_Z_ZLOCK_INLINE_HPP |
| #define SHARE_GC_Z_ZLOCK_INLINE_HPP |
| |
| #include "gc/z/zLock.hpp" |
| #include "runtime/atomic.hpp" |
| #include "runtime/os.inline.hpp" |
| #include "runtime/thread.hpp" |
| #include "utilities/debug.hpp" |
| |
| inline void ZLock::lock() { |
| _lock.lock(); |
| } |
| |
| inline bool ZLock::try_lock() { |
| return _lock.try_lock(); |
| } |
| |
| inline void ZLock::unlock() { |
| _lock.unlock(); |
| } |
| |
| inline ZReentrantLock::ZReentrantLock() : |
| _lock(), |
| _owner(NULL), |
| _count(0) {} |
| |
| inline void ZReentrantLock::lock() { |
| Thread* const thread = Thread::current(); |
| Thread* const owner = Atomic::load(&_owner); |
| |
| if (owner != thread) { |
| _lock.lock(); |
| Atomic::store(thread, &_owner); |
| } |
| |
| _count++; |
| } |
| |
| inline void ZReentrantLock::unlock() { |
| assert(is_owned(), "Invalid owner"); |
| assert(_count > 0, "Invalid count"); |
| |
| _count--; |
| |
| if (_count == 0) { |
| Atomic::store((Thread*)NULL, &_owner); |
| _lock.unlock(); |
| } |
| } |
| |
| inline bool ZReentrantLock::is_owned() const { |
| Thread* const thread = Thread::current(); |
| Thread* const owner = Atomic::load(&_owner); |
| return owner == thread; |
| } |
| |
| template <typename T> |
| inline ZLocker<T>::ZLocker(T* lock) : |
| _lock(lock) { |
| if (_lock != NULL) { |
| _lock->lock(); |
| } |
| } |
| |
| template <typename T> |
| inline ZLocker<T>::~ZLocker() { |
| if (_lock != NULL) { |
| _lock->unlock(); |
| } |
| } |
| |
| #endif // SHARE_GC_Z_ZLOCK_INLINE_HPP |