1 /* 2 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZFUTURE_INLINE_HPP 25 #define SHARE_GC_Z_ZFUTURE_INLINE_HPP 26 27 #include "gc/z/zFuture.hpp" 28 #include "runtime/semaphore.inline.hpp" 29 #include "runtime/thread.hpp" 30 31 template <typename T> 32 inline ZFuture<T>::ZFuture() : 33 _value() {} 34 35 template <typename T> 36 inline void ZFuture<T>::set(T value) { 37 // Set value 38 _value = value; 39 40 // Notify waiter 41 _sema.signal(); 42 } 43 44 template <typename T> 45 inline T ZFuture<T>::peek() { 46 return _value; 47 } 48 49 template <typename T> 50 inline T ZFuture<T>::get() { 51 // Wait for notification 52 Thread* const thread = Thread::current(); 53 if (thread->is_Java_thread()) { 54 _sema.wait_with_safepoint_check((JavaThread*)thread); 55 } else { 56 _sema.wait(); 57 } 58 59 // Return value 60 return _value; 61 } 62 63 #endif // SHARE_GC_Z_ZFUTURE_INLINE_HPP