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/**
* @file
*
* @brief Set Specific Key
* @ingroup POSIXAPI
*/
/*
* Copyright (c) 2012 Zhongwei Yao.
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/keyimpl.h>
#include <rtems/score/thread.h>
#include <rtems/score/chainimpl.h>
#include <errno.h>
/*
* 17.1.2 Thread-Specific Data Management, P1003.1c/Draft 10, p. 165
*/
int pthread_setspecific(
pthread_key_t key,
const void *value
)
{
POSIX_Keys_Control *the_key;
Objects_Locations location;
POSIX_Keys_Key_value_pair *value_pair_ptr;
RBTree_Node *p;
Thread_Control *executing;
the_key = _POSIX_Keys_Get( key, &location );
switch ( location ) {
case OBJECTS_LOCAL:
executing = _Thread_Executing;
p = _POSIX_Keys_Find( key, executing );
if ( p != NULL ) {
value_pair_ptr = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( p );
value_pair_ptr->value = RTEMS_DECONST( void *, value );
} else {
value_pair_ptr = _POSIX_Keys_Key_value_pair_allocate();
if ( !value_pair_ptr ) {
_Objects_Put( &the_key->Object );
return ENOMEM;
}
value_pair_ptr->key = key;
value_pair_ptr->thread = executing;
value_pair_ptr->value = RTEMS_DECONST( void *, value );
/* The insert can only go wrong if the same node is already in a unique
* tree. This has been already checked with the _RBTree_Find() */
_RBTree_Insert(
&_POSIX_Keys_Key_value_lookup_tree,
&value_pair_ptr->Key_value_lookup_node,
_POSIX_Keys_Key_value_compare,
true
);
/** append rb_node to the thread API extension's chain */
_Chain_Append_unprotected(
&_Thread_Executing->Key_Chain,
&value_pair_ptr->Key_values_per_thread_node
);
}
_Objects_Put( &the_key->Object );
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* should never happen */
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
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