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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef OS_POSIX_SEMAPHORE_POSIX_HPP
26#define OS_POSIX_SEMAPHORE_POSIX_HPP
27
28#include "memory/allocation.hpp"
29
30#include <semaphore.h>
31
32class PosixSemaphore : public CHeapObj<mtInternal> {
33 sem_t _semaphore;
34
35 // Prevent copying and assignment.
36 PosixSemaphore(const PosixSemaphore&);
37 PosixSemaphore& operator=(const PosixSemaphore&);
38
39 public:
40 PosixSemaphore(uint value = 0);
41 ~PosixSemaphore();
42
43 void signal(uint count = 1);
44
45 void wait();
46
47 bool trywait();
48 // wait until the given absolute time is reached
49 bool timedwait(struct timespec ts);
50 // wait until the given relative time elapses
51 bool timedwait(int64_t millis);
52};
53
54typedef PosixSemaphore SemaphoreImpl;
55
56#endif // OS_POSIX_SEMAPHORE_POSIX_HPP
57