OZ++ Class: KeyedSemaphore |
/****************************************************************************** * * Copyright (c) 2014 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * KeyedSemaphore.h * *****************************************************************************/ #pragma once #include <oz++/CommonObject.h> #include <oz++/Exception.h> #include <sys/types.h> #include <sys/ipc.h> #include <sys/sem.h> #include <oz++/Semaphore.h> namespace OZ { class KeyedSemaphore :public Semaphore { public: KeyedSemaphore() :Semaphore() { } public: KeyedSemaphore(key_t key, int num=1, int semflg=(DEFAULT_PERMISSION|IPC_CREAT) ) :Semaphore(key, num, semflg) { } public: /*For example, ftok can be used to generate a key to be passed to the first argument of this Contstructor. key_t key = ftok(fullpath, id); KeyedSemaphore(key); */ int create(key_t key, int num=1, int semflg=(DEFAULT_PERMISSION|IPC_CREAT) ) { return Semaphore::create(key, num, semflg); } public: ~KeyedSemaphore() { } }; }