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 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 #include <gecode/support.hh> 00035 00036 namespace Gecode { namespace Support { 00037 00038 /* 00039 * Threads 00040 */ 00041 00042 Mutex* Thread::m(void) { 00043 static Mutex* m = new Mutex; 00044 return m; 00045 } 00046 00047 Thread::Run* Thread::idle = NULL; 00048 00049 void 00050 Thread::Run::exec(void) { 00051 while (true) { 00052 // Execute runnable 00053 { 00054 Runnable* e; 00055 m.acquire(); 00056 GECODE_ASSUME(r != NULL); 00057 e=r; r=NULL; 00058 m.release(); 00059 assert(e != NULL); 00060 e->run(); 00061 if (e->todelete()) { 00062 Terminator* t = e->terminator(); 00063 delete e; 00064 if (t) 00065 t->terminated(); 00066 } 00067 } 00068 // Put into idle stack 00069 Thread::m()->acquire(); 00070 n=Thread::idle; Thread::idle=this; 00071 Thread::m()->release(); 00072 // Wait for next runnable 00073 e.wait(); 00074 } 00075 } 00076 00077 }} 00078 00079 // STATISTICS: support-any