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/home/fbassi/devel/projects/reti/utils/Lock.cc

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00001 /*
00002  *    FBFS Distributed Object Repository
00003  *    Copyright (C) 2001 Francesco V. Bassi
00004  *
00005  *    This program is free software; you can redistribute it and/or modify
00006  *    it under the terms of the GNU General Public License as published by
00007  *    the Free Software Foundation; either version 2 of the License, or
00008  *    (at your option) any later version.
00009  *
00010  *    This program is distributed in the hope that it will be useful,
00011  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *    GNU General Public License for more details.
00014  *
00015  *    You should have received a copy of the GNU General Public License
00016  *    along with this program; if not, write to the Free Software
00017  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018  */
00019 
00025 #include "Lock.h"
00026 
00027 utils::Lock::Lock() {
00028     pthread_mutex_init(&mut, NULL);
00029     pthread_cond_init(&cond, NULL);
00030 };
00031 
00032 utils::Lock::~Lock() {
00033     pthread_mutex_destroy(&mut);
00034     pthread_cond_destroy(&cond);
00035 };
00036 
00037 inline void utils::Lock::alloc(const string &res) { resources.insert(res); };
00038 inline void utils::Lock::free(const string &res) { resources.erase(res); };
00039 inline bool utils::Lock::isfree(const string &res) { return resources.count(res)==0; };
00040 
00041 void utils::Lock::lock(const string &resource) {
00042     pthread_mutex_lock(&mut);
00043     while(!isfree(resource))
00044         pthread_cond_wait(&cond, &mut);
00045     alloc(resource);
00046     pthread_mutex_unlock(&mut);
00047 };
00048 
00049 void utils::Lock::unlock(const string &resource) {
00050     pthread_mutex_lock(&mut);
00051     free(resource);
00052     pthread_cond_broadcast(&cond);
00053     pthread_mutex_unlock(&mut);
00054 };
00055 

Generato il Thu Feb 15 13:24:57 2001 per A Simple Distributed Object Repository with CORBA & C++. da doxygen1.2.3 scritto da Dimitri van Heesch, © 1997-2000