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/* Deallocate a thread structure.
Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <assert.h>
#include <pthread.h>
#include <stdlib.h>
#include <pt-internal.h>
#include <bits/atomic.h>
/* List of thread structures corresponding to free thread IDs. */
extern __atomicptr_t __pthread_free_threads;
/* Deallocate the thread structure for PTHREAD and the resources
associated with it. */
void
__pthread_dealloc (struct __pthread *pthread)
{
assert (pthread->state != PTHREAD_TERMINATED);
/* Withdraw this thread from the thread ID lookup table. */
__pthread_setid (pthread->thread, NULL);
/* Mark the thread as terminated. We broadcast the condition
here to prevent pthread_join from waiting for this thread to
exit where it was never really started. Such a call to
pthread_join is completely bogus, but unfortunately allowed
by the standards. */
__pthread_mutex_lock (&pthread->state_lock);
pthread->state = PTHREAD_TERMINATED;
if (pthread->state != PTHREAD_EXITED)
pthread_cond_broadcast (&pthread->state_cond);
__pthread_mutex_unlock (&pthread->state_lock);
/* We do not actually deallocate the thread structure, but add it to
a list of re-usable thread structures. */
while (1)
{
pthread->next = (struct __pthread *)__pthread_free_threads;
if (__atomicptr_compare_and_swap (&__pthread_free_threads,
pthread->next, pthread))
return;
}
/* NOTREACHED */
}
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