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/* Copyright (C) 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.
The GNU C 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 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <pthreadP.h>
#include <thread.h>
#include <errno.h>
#include <assert.h>
#include <inline-syscall.h>
DECLARE_INLINE_SYSCALL (int, lwp_wait, thread_t lwpid, thread_t *departed);
int thr_join (thread_t thread, thread_t *departed, void **status)
{
if (thread == 0)
{
/* Wait for any thread to terminate. */
thread_t _departed;
int errval = INLINE_SYSCALL (lwp_wait, 2, 0, &_departed);
if(errval != 0)
return errval;
/* Check if this is a thread we know about. */
struct pthread *pd = __find_in_stack_list (_departed);
if (pd == NULL)
{
if (departed)
*departed = _departed;
if (status)
*status = 0;
return 0;
}
/* We mark the thread as terminated and as joined. */
pd->tid = -1;
/* Store the return value if the caller is interested. */
if (status != NULL)
*status = pd->result;
/* Free the TCB. */
__free_tcb (pd);
/* Return the thread_t we waited on if the caller is interested. */
if (departed)
*departed = (thread_t)thread;
return 0;
}
else
{
/* Normal wait. */
int errval = pthread_join (thread, status);
if (errval == 0 && departed)
*departed = thread;
return errval;
}
}
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