/****************************************************************************
* sched/pthread/pthread_setspecific.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_setspecific
*
* Description:
* The pthread_setspecific() function associates a thread-
* specific value with a key obtained via a previous call
* to pthread_key_create(). Different threads may bind
* different values to the same key. These values are
* typically pointers to blocks of dynamically allocated
* memory that have been reserved for use by the calling
* thread.
*
* The effect of calling pthread_setspecific() 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
* value = The value to bind to the key.
*
* Return Value:
* If successful, pthread_setspecific() will return zero (OK).
* Otherwise, an error number will be returned:
*
* ENOMEM - Insufficient memory exists to associate
* the value with the key.
* EINVAL - The key value is invalid.
*
* Assumptions:
*
* POSIX Compatibility:
* int pthread_setspecific(pthread_key_t key, void *value)
* void *pthread_getspecific(pthread_key_t key)
*
* - Both calling pthread_setspecific() and pthread_getspecific()
* may be called from a thread-specific data destructor
* function.
*
****************************************************************************/
int pthread_setspecific(pthread_key_t key, FAR const void *value)
{
#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;
int ret = EINVAL;
DEBUGASSERT(group &&
(rtcb->cmn.flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD);
/* Check if the key is valid. */
if (key < group->tg_nkeys)
{
/* Store the data in the TCB. */
rtcb->pthread_data[key] = (FAR void*)value;
/* Return success. */
ret = OK;
}
return ret;
#else
return ENOSYS;
#endif
}
