/*  * spin2.c * * * -------------------------------------------------------------------------- * *      Pthreads-win32 - POSIX Threads Library for Win32 *      Copyright(C) 1998 John E. Bossom *      Copyright(C) 1999,2005 Pthreads-win32 contributors *  *      Contact Email: rpj@callisto.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 * * -------------------------------------------------------------------------- * * Declare a spinlock object, lock it, trylock it,  * and then unlock it again. * */#include "test.h" pthread_spinlock_t lock = NULL;static int washere = 0;void * func(void * arg){  assert(pthread_spin_trylock(&lock) == EBUSY);  washere = 1;  return 0; } intmain(){  pthread_t t;  assert(pthread_spin_init(&lock, PTHREAD_PROCESS_PRIVATE) == 0);  assert(pthread_spin_lock(&lock) == 0);  assert(pthread_create(&t, NULL, func, NULL) == 0);  assert(pthread_join(t, NULL) == 0);  assert(pthread_spin_unlock(&lock) == 0);  assert(pthread_spin_destroy(&lock) == 0);  assert(washere == 1);  return 0;}