forked from Archive/PX4-Autopilot
138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/************************************************************************
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* sched/pthread_detach.c
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*
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdbool.h>
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#include <pthread.h>
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#include <errno.h>
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#include <debug.h>
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#include "os_internal.h"
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#include "pthread_internal.h"
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/************************************************************************
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* Pre-processor Definitions
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************************************************************************/
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/************************************************************************
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* Private Type Declarations
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************************************************************************/
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/************************************************************************
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* Global Variables
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************************************************************************/
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/************************************************************************
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* Private Variables
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************************************************************************/
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/************************************************************************
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* Private Functions
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************************************************************************/
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/************************************************************************
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* Public Functions
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************************************************************************/
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/************************************************************************
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* Name: pthread_detach
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*
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* Description:
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* A thread object may be "detached" to specify that the return value
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* and completion status will not be requested.
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*
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* Parameters:
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* thread
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*
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* Return Value:
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* 0 if successful. Otherwise, an error code.
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*
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* Assumptions:
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*
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************************************************************************/
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int pthread_detach(pthread_t thread)
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{
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FAR join_t *pjoin;
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int ret;
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sdbg("Thread=%d\n", thread);
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/* Find the entry associated with this pthread. */
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(void)pthread_takesemaphore(&g_join_semaphore);
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pjoin = pthread_findjoininfo((pid_t)thread);
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if (!pjoin)
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{
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sdbg("Could not find thread entry\n");
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ret = EINVAL;
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}
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else
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{
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/* Has the thread already terminated? */
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if (pjoin->terminated)
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{
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/* YES.. just remove the thread entry. */
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pthread_destroyjoin(pjoin);
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}
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else
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{
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/* NO.. Just mark the thread as detached. It
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* will be removed and deallocated when the
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* thread exits
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*/
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pjoin->detached = true;
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}
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/* Either case is successful */
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ret = OK;
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}
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(void)pthread_givesemaphore(&g_join_semaphore);
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sdbg("Returning %d\n", ret);
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return ret;
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}
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