// ------------------------------- // // -------- Start of File -------- // // ------------------------------- // // ----------------------------------------------------------- // // C++ Source Code File Name: testprog.cpp // Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC // Produced By: glNET Software // File Creation Date: 03/25/2000 // Date Last Modified: 07/23/2001 // Copyright (c) 2001 glNET Software // ----------------------------------------------------------- // // ------------- 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 Mutex example used to show how corruption can result if no serialization is done. */ // ----------------------------------------------------------- // #include <iostream.h> #include "gxthread.h" #include "gxmutex.h" #ifdef __MSVC_DEBUG__ #include "leaktest.h" #endif // Constants const int LOOPCONSTANT = 100000; const int NUM_THREADS = 10; // Mutex that will be shared by threads within this process gxMutex mutex; // Global variables int i, j, k, l; int uselock = 1; // TRUE if locking shared data class SimpleThread : public gxThread { public: SimpleThread() { } ~SimpleThread() { } private: // Base class interface void *ThreadEntryRoutine(gxThread_t *thread); }; void *SimpleThread::ThreadEntryRoutine(gxThread_t *thread) { for(int loop=0; loop < LOOPCONSTANT; ++loop) { if(uselock) { // Lock critical section if uselock is true if(mutex.MutexLock() != 0) { cout << mutex.MutexExceptionMessage() << "\n"; return ExitThread(thread, 1); } } // Shared data ++i; ++j; ++k; ++l; if(uselock) { if(mutex.MutexUnlock() != 0) { cout << mutex.MutexExceptionMessage() << "\n"; return ExitThread(thread, 1); } } } return 0; } int main() { #ifdef __MSVC_DEBUG__ InitLeakTest(); #endif SimpleThread t; gxThread_t *thread[NUM_THREADS]; int loop; cout << "Creating " << NUM_THREADS << " threads" << "\n"; for(loop = 0; loop < NUM_THREADS; ++loop) thread[loop] = t.CreateThread(); cout << "Wait for results" << "\n"; t.sSleep(10); cout << "Show results" << "\n"; cout << "Using " << NUM_THREADS << " threads and " << LOOPCONSTANT << " loop constant" << "\n"; cout << "Values are: (should be " << (NUM_THREADS * LOOPCONSTANT) << ")" << "\n"; cout << " ==>" << i << ' ' << j << ' ' << k << ' ' << l << "\n"; cout << "Main thread completed" << "\n"; // Prevent memory leaks for(loop = 0; loop < NUM_THREADS; ++loop) delete thread[loop]; return 0; } // ----------------------------------------------------------- // // ------------------------------- // // --------- End of File --------- // // ------------------------------- //