thread.cpp
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2009 00008 * 00009 * Last modified: 00010 * $Date: 2009-10-13 15:19:20 +0200 (Tue, 13 Oct 2009) $ by $Author: schulte $ 00011 * $Revision: 9887 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #include <gecode/support.hh> 00039 00040 namespace Gecode { namespace Support { 00041 00042 /* 00043 * Threads 00044 */ 00045 Mutex Thread::m; 00046 Thread::Run* Thread::idle = NULL; 00047 00048 void 00049 Thread::Run::exec(void) { 00050 while (true) { 00051 // Execute runnable 00052 { 00053 Runnable* e; 00054 m.acquire(); 00055 e=r; r=NULL; 00056 m.release(); 00057 assert(e != NULL); 00058 e->run(); 00059 delete e; 00060 } 00061 // Put into idle stack 00062 Thread::m.acquire(); 00063 n=Thread::idle; Thread::idle=this; 00064 Thread::m.release(); 00065 // Wait for next runnable 00066 e.wait(); 00067 } 00068 } 00069 00070 }} 00071 00072 // STATISTICS: support-any