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src/share/vm/runtime/semaphore.hpp@fd44df5e3bc3 (annotated)
src/share/vm/runtime/semaphore.hpp
Wed, 14 Oct 2020 17:44:48 +0800
- author
- aoqi
- date
- Wed, 14 Oct 2020 17:44:48 +0800
- changeset 9931
- fd44df5e3bc3
- parent 9858
- b985cbb00e68
- permissions
- -rw-r--r--
Merge
| apetushkov@9858 | 1 | /* |
| apetushkov@9858 | 2 | * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| apetushkov@9858 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| apetushkov@9858 | 4 | * |
| apetushkov@9858 | 5 | * This code is free software; you can redistribute it and/or modify it |
| apetushkov@9858 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| apetushkov@9858 | 7 | * published by the Free Software Foundation. |
| apetushkov@9858 | 8 | * |
| apetushkov@9858 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| apetushkov@9858 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| apetushkov@9858 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| apetushkov@9858 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| apetushkov@9858 | 13 | * accompanied this code). |
| apetushkov@9858 | 14 | * |
| apetushkov@9858 | 15 | * You should have received a copy of the GNU General Public License version |
| apetushkov@9858 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| apetushkov@9858 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| apetushkov@9858 | 18 | * |
| apetushkov@9858 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| apetushkov@9858 | 20 | * or visit www.oracle.com if you need additional information or have any |
| apetushkov@9858 | 21 | * questions. |
| apetushkov@9858 | 22 | * |
| apetushkov@9858 | 23 | */ |
| apetushkov@9858 | 24 | |
| apetushkov@9858 | 25 | #ifndef SHARE_VM_RUNTIME_SEMAPHORE_HPP |
| apetushkov@9858 | 26 | #define SHARE_VM_RUNTIME_SEMAPHORE_HPP |
| apetushkov@9858 | 27 | |
| apetushkov@9858 | 28 | #include "memory/allocation.hpp" |
| apetushkov@9858 | 29 | |
| apetushkov@9858 | 30 | #if defined(LINUX) || defined(SOLARIS) || defined(AIX) |
| apetushkov@9858 | 31 | # include "semaphore_posix.hpp" |
| apetushkov@9858 | 32 | #elif defined(BSD) |
| apetushkov@9858 | 33 | # include "semaphore_bsd.hpp" |
| apetushkov@9858 | 34 | #elif defined(_WINDOWS) |
| apetushkov@9858 | 35 | # include "semaphore_windows.hpp" |
| apetushkov@9858 | 36 | #else |
| apetushkov@9858 | 37 | # error "No semaphore implementation provided for this OS" |
| apetushkov@9858 | 38 | #endif |
| apetushkov@9858 | 39 | |
| apetushkov@9858 | 40 | class JavaThread; |
| apetushkov@9858 | 41 | |
| apetushkov@9858 | 42 | // Implements the limited, platform independent Semaphore API. |
| apetushkov@9858 | 43 | class Semaphore : public CHeapObj<mtInternal> { |
| apetushkov@9858 | 44 | SemaphoreImpl _impl; |
| apetushkov@9858 | 45 | |
| apetushkov@9858 | 46 | // Prevent copying and assignment of Semaphore instances. |
| apetushkov@9858 | 47 | Semaphore(const Semaphore&); |
| apetushkov@9858 | 48 | Semaphore& operator=(const Semaphore&); |
| apetushkov@9858 | 49 | |
| apetushkov@9858 | 50 | public: |
| apetushkov@9858 | 51 | Semaphore(uint value = 0) : _impl(value) {} |
| apetushkov@9858 | 52 | ~Semaphore() {} |
| apetushkov@9858 | 53 | |
| apetushkov@9858 | 54 | void signal(uint count = 1) { _impl.signal(count); } |
| apetushkov@9858 | 55 | |
| apetushkov@9858 | 56 | void wait() { _impl.wait(); } |
| apetushkov@9858 | 57 | |
| apetushkov@9858 | 58 | bool trywait() { return _impl.trywait(); } |
| apetushkov@9858 | 59 | |
| apetushkov@9858 | 60 | void wait_with_safepoint_check(JavaThread* thread); |
| apetushkov@9858 | 61 | }; |
| apetushkov@9858 | 62 | |
| apetushkov@9858 | 63 | #endif // SHARE_VM_RUNTIME_SEMAPHORE_HPP |
