129 lines
4.6 KiB
C
129 lines
4.6 KiB
C
/************************************************************************
|
|
* sched/pthread/pthread_getspecific.c
|
|
*
|
|
* Copyright (C) 2007, 2009, 2013 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 NuttX 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 <nuttx/config.h>
|
|
|
|
#include <sched.h>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#include <debug.h>
|
|
|
|
#include "sched/sched.h"
|
|
#include "pthread/pthread.h"
|
|
|
|
/************************************************************************
|
|
* Definitions
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Private Type Declarations
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Global Variables
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Private Variables
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Private Functions
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Public Functions
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
* Name: pthread_getspecific
|
|
*
|
|
* Description:
|
|
* The pthread_getspecific() function returns the value currently
|
|
* bound to the specified key on behalf of the calling thread.
|
|
*
|
|
* The effect of calling pthread_getspecific() with with a key value
|
|
* not obtained from pthread_create() or after a key has been deleted
|
|
* with pthread_key_delete() is undefined.
|
|
*
|
|
* Parameters:
|
|
* key = The data key to get or set
|
|
*
|
|
* Return Value:
|
|
* The function pthread_getspecific() returns the thread-specific data
|
|
* associated with the given key. If no thread specific data is
|
|
* associated with the key, then the value NULL is returned.
|
|
*
|
|
* EINVAL - The key value is invalid.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
* POSIX Compatibility:
|
|
* - Both calling pthread_setspecific() and pthread_getspecific()
|
|
* may be called from a thread-specific data destructor
|
|
* function.
|
|
*
|
|
************************************************************************/
|
|
|
|
FAR void *pthread_getspecific(pthread_key_t key)
|
|
{
|
|
#if CONFIG_NPTHREAD_KEYS > 0
|
|
FAR struct pthread_tcb_s *rtcb = (FAR struct pthread_tcb_s*)g_readytorun.head;
|
|
FAR struct task_group_s *group = rtcb->cmn.group;
|
|
FAR void *ret = NULL;
|
|
|
|
DEBUGASSERT(group &&
|
|
(rtcb->cmn.flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD);
|
|
|
|
/* Check if the key is valid. */
|
|
|
|
if (key < group->tg_nkeys)
|
|
{
|
|
/* Return the stored value. */
|
|
|
|
ret = rtcb->pthread_data[key];
|
|
}
|
|
|
|
return ret;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|