// ------------------------------- // // -------- Start of File -------- // // ------------------------------- // // ----------------------------------------------------------- // // C++ Source Code File Name: testprog.cpp // Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC // Produced By: Doug Gaer // File Creation Date: 03/25/2000 // Date Last Modified: 08/10/2000 // Copyright (c) 2000 Douglas M. Gaer // ----------------------------------------------------------- // // ------------- Program Description and Details ------------- // // ----------------------------------------------------------- // /* This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Simple test program demonstrating the basic operation of the vbThread class using condition variables. */ // ----------------------------------------------------------- // #include <iostream.h> #include "vbthread.h" #include "vbcond.h" #include "vbmutex.h" // For safe condition variable usage, must use a boolean predicate and // a mutex with the condition. int conditionMet = 0; vbCondition cond; vbMutex mutex; class SimpleThread : public vbThread { private: // Base class interface void *ThreadEntryRoutine(vbThread_t *thread); }; void *SimpleThread::ThreadEntryRoutine(vbThread_t *thread) // Thread's entry function { mutex.MutexLock(); while (!conditionMet) { cout << "Thread blocked" << endl; cond.ConditionWait(&mutex); } mutex.MutexUnlock(); return 0; } int main(int argc, char **argv) { const int NUM_THREADS = 5; SimpleThread t; vbThread_t *thread[NUM_THREADS]; cout << "Create " << NUM_THREADS << " threads" << endl; int i; for(i = 0; i < NUM_THREADS; i++) thread[i] = t.CreateThread(); t.sSleep(1); // Serialize the threads mutex.MutexLock(); // The condition has occured. Set the flag and wake up any waiters conditionMet = 1; cout << "Wake up all waiters..." << endl; cond.ConditionBroadcast(); mutex.MutexUnlock(); cout << "Wait for threads before exiting" << endl; for(i = 0; i < NUM_THREADS; ++i) t.JoinThread(thread[i]); return 0; } // ----------------------------------------------------------- // // ------------------------------- // // --------- End of File --------- // // ------------------------------- //