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 25 #ifndef OS_POSIX_SEMAPHORE_POSIX_HPP 26 #define OS_POSIX_SEMAPHORE_POSIX_HPP 27 28 #include "memory/allocation.hpp" 29 #include "utilities/macros.hpp" 30 31 #include <semaphore.h> 32 33 class PosixSemaphore : public CHeapObj<mtInternal> { 34 sem_t _semaphore; 35 36 NONCOPYABLE(PosixSemaphore); 37 38 public: 39 PosixSemaphore(uint value = 0); 40 ~PosixSemaphore(); 41 42 void signal(uint count = 1); 43 44 void wait(); 45 46 bool trywait(); 47 // wait until the given absolute time is reached 48 bool timedwait(struct timespec ts); 49 // wait until the given relative time elapses 50 bool timedwait(int64_t millis); 51 }; 52 53 typedef PosixSemaphore SemaphoreImpl; 54 55 #endif // OS_POSIX_SEMAPHORE_POSIX_HPP