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/*
* spin3.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
*
* --------------------------------------------------------------------------
*
* Thread A locks spin - thread B tries to unlock.
* This should succeed, but it's undefined behaviour.
*
*/
#include "test.h"
static int wasHere = 0;
static pthread_spinlock_t spin;
void * unlocker(void * arg)
{
int expectedResult = (int)(size_t)arg;
wasHere++;
assert(pthread_spin_unlock(&spin) == expectedResult);
wasHere++;
return NULL;
}
int
main()
{
pthread_t t;
wasHere = 0;
assert(pthread_spin_init(&spin, PTHREAD_PROCESS_PRIVATE) == 0);
assert(pthread_spin_lock(&spin) == 0);
assert(pthread_create(&t, NULL, unlocker, (void*)0) == 0);
assert(pthread_join(t, NULL) == 0);
/*
* Our spinlocks don't record the owner thread so any thread can unlock the spinlock,
* but nor is it an error for any thread to unlock a spinlock that is not locked.
*/
assert(pthread_spin_unlock(&spin) == 0);
assert(pthread_spin_destroy(&spin) == 0);
assert(wasHere == 2);
return 0;
}