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/*
* Copyright (c) 1996, 1998, 1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
#include <threads/pthread_internal.h>
/*
* Local addition; retrieve the state of a target thread.
*
* Returns ENIVAL if the thread is bogus, 0 on success.
*/
int
oskit_pthread_getstate(pthread_t tid, pthread_state_t *pstate)
{
pthread_thread_t *pthread;
if ((pthread = tidtothread(tid)) == NULL_THREADPTR)
return EINVAL;
/*
* Kinda Bogus. There is no way to prevent a thread from being
* scheduled after the getstate is done, thus changing the state.
* It is up to the caller to prevent the target thread from running.
*/
disable_preemption();
pthread_lock(&pthread->lock);
/* Machine dependent routine. */
thread_getstate(pthread, pstate);
pthread_unlock(&pthread->lock);
enable_preemption();
return 0;
}
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