77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
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/*
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* spin3.c
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*
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* --------------------------------------------------------------------------
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*
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* Thread A locks spin - thread B tries to unlock.
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* This should succeed, but it's undefined behaviour.
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*
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*/
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#include "test.h"
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static int wasHere = 0;
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static pthread_spinlock_t spin;
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void * unlocker(void * arg)
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{
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int expectedResult = (int)(size_t)arg;
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wasHere++;
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assert(pthread_spin_unlock(&spin) == expectedResult);
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wasHere++;
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return NULL;
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}
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int
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main()
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{
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pthread_t t;
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wasHere = 0;
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assert(pthread_spin_init(&spin, PTHREAD_PROCESS_PRIVATE) == 0);
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assert(pthread_spin_lock(&spin) == 0);
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assert(pthread_create(&t, NULL, unlocker, (void*)0) == 0);
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assert(pthread_join(t, NULL) == 0);
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/*
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* Our spinlocks don't record the owner thread so any thread can unlock the spinlock,
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* but nor is it an error for any thread to unlock a spinlock that is not locked.
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*/
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assert(pthread_spin_unlock(&spin) == 0);
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assert(pthread_spin_destroy(&spin) == 0);
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assert(wasHere == 2);
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return 0;
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}
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