| /* |
| * Copyright (c) 2015, 2016, 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_VM_RUNTIME_SEMAPHORE_HPP |
| #define SHARE_VM_RUNTIME_SEMAPHORE_HPP |
| |
| #include "memory/allocation.hpp" |
| |
| #if defined(LINUX) || defined(SOLARIS) || defined(AIX) |
| # include "semaphore_posix.hpp" |
| #elif defined(BSD) |
| # include "semaphore_bsd.hpp" |
| #elif defined(_WINDOWS) |
| # include "semaphore_windows.hpp" |
| #else |
| # error "No semaphore implementation provided for this OS" |
| #endif |
| |
| // Implements the limited, platform independent Semaphore API. |
| class Semaphore : public CHeapObj<mtInternal> { |
| SemaphoreImpl _impl; |
| |
| // Prevent copying and assignment of Semaphore instances. |
| Semaphore(const Semaphore&); |
| Semaphore& operator=(const Semaphore&); |
| |
| public: |
| Semaphore(uint value = 0) : _impl(value) {} |
| ~Semaphore() {} |
| |
| void signal(uint count = 1) { _impl.signal(count); } |
| |
| void wait() { _impl.wait(); } |
| |
| bool trywait() { return _impl.trywait(); } |
| }; |
| |
| |
| #endif // SHARE_VM_RUNTIME_SEMAPHORE_HPP |