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/************************************************************
* pthread_detach.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <sys/types.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
#include "os_internal.h"
#include "pthread_internal.h"
/************************************************************
* Definitions
************************************************************/
/************************************************************
* Private Type Declarations
************************************************************/
/************************************************************
* Global Variables
************************************************************/
/************************************************************
* Private Variables
************************************************************/
/************************************************************
* Private Functions
************************************************************/
/************************************************************
* Public Functions
************************************************************/
/************************************************************
* Function: pthread_detach
*
* Description:
* A thread object may be "detached" to specify that the return
* value and completion status will not be requested.
*
* Parameters:
* thread
*
* Return Value:
* 0 if successful. Otherwise, an error code.
*
* Assumptions:
*
************************************************************/
int pthread_detach(pthread_t thread)
{
FAR join_t *pjoin;
int ret;
sdbg("Thread=%d\n", thread);
/* Find the entry associated with this pthread. */
(void)pthread_takesemaphore(&g_join_semaphore);
pjoin = pthread_findjoininfo((pid_t)thread);
if (!pjoin)
{
sdbg("Could not find thread entry\n");
ret = EINVAL;
}
else
{
/* Has the thread already terminated? */
if (pjoin->terminated)
{
/* YES.. just remove the thread entry. */
pthread_destroyjoin(pjoin);
}
else
{
/* NO.. Just mark the thread as detached. It
* will be removed and deallocated when the
* thread exits
*/
pjoin->detached = TRUE;
}
/* Either case is successful */
ret = OK;
}
(void)pthread_givesemaphore(&g_join_semaphore);
sdbg("Returning %d\n", ret);
return ret;
}
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