/* * rwlock6_t.c * * * -------------------------------------------------------------------------- * * -------------------------------------------------------------------------- * * Pthreads-win32 - POSIX Threads Library for Win32 * Copyright(C) 1998 John E. Bossom * Copyright(C) 1999,2002 Pthreads-win32 contributors * * Contact Email: rpj@ise.canberra.edu.au * * The current list of contributors is contained * in the file CONTRIBUTORS included with the source * code distribution. The list can also be seen at the * following World Wide Web location: * http://sources.redhat.com/pthreads-win32/contributors.html * * 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 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 in the file COPYING.LIB; * if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * * -------------------------------------------------------------------------- * * Check writer and reader locking with reader timeouts * * Depends on API functions: * pthread_rwlock_timedrdlock() * pthread_rwlock_wrlock() * pthread_rwlock_unlock() */ #include "test.h" #include <sys/timeb.h> static pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER; static int bankAccount = 0; void * wrfunc(void * arg) { assert(pthread_rwlock_wrlock(&rwlock1) == 0); Sleep(2000); bankAccount += 10; assert(pthread_rwlock_unlock(&rwlock1) == 0); return ((void *) bankAccount); } void * rdfunc(void * arg) { int ba = -1; struct timespec abstime = { 0, 0 }; struct _timeb currSysTime; const DWORD NANOSEC_PER_MILLISEC = 1000000; _ftime(&currSysTime); abstime.tv_sec = currSysTime.time; abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm; if ((int) arg == 1) { abstime.tv_sec += 1; assert(pthread_rwlock_timedrdlock(&rwlock1, &abstime) == ETIMEDOUT); ba = 0; } else if ((int) arg == 2) { abstime.tv_sec += 3; assert(pthread_rwlock_timedrdlock(&rwlock1, &abstime) == 0); ba = bankAccount; assert(pthread_rwlock_unlock(&rwlock1) == 0); } return ((void *) ba); } int main() { pthread_t wrt1; pthread_t wrt2; pthread_t rdt1; pthread_t rdt2; int wr1Result = 0; int wr2Result = 0; int rd1Result = 0; int rd2Result = 0; bankAccount = 0; assert(pthread_create(&wrt1, NULL, wrfunc, NULL) == 0); Sleep(500); assert(pthread_create(&rdt1, NULL, rdfunc, (void *) 1) == 0); Sleep(500); assert(pthread_create(&wrt2, NULL, wrfunc, NULL) == 0); Sleep(500); assert(pthread_create(&rdt2, NULL, rdfunc, (void *) 2) == 0); assert(pthread_join(wrt1, (void **) &wr1Result) == 0); assert(pthread_join(rdt1, (void **) &rd1Result) == 0); assert(pthread_join(wrt2, (void **) &wr2Result) == 0); assert(pthread_join(rdt2, (void **) &rd2Result) == 0); assert(wr1Result == 10); assert(rd1Result == 0); assert(wr2Result == 20); assert(rd2Result == 20); return 0; }