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/**
* @file
*
* @brief Thread-Specific Data Key Create
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2010.
* On-Line Applications Research Corporation (OAR).
* Copyright (c) 2016 embedded brains GmbH.
*
* 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/userextimpl.h>
#include <rtems/score/wkspace.h>
#include <rtems/sysinit.h>
#include <errno.h>
/**
* 17.1.1 Thread-Specific Data Key Create, P1003.1c/Draft 10, p. 163
*/
int pthread_key_create(
pthread_key_t *key,
void (*destructor)( void * )
)
{
POSIX_Keys_Control *the_key;
the_key = _POSIX_Keys_Allocate();
if ( !the_key ) {
_Objects_Allocator_unlock();
return EAGAIN;
}
the_key->destructor = destructor;
_Chain_Initialize_empty( &the_key->Key_value_pairs );
_Objects_Open_u32( &_POSIX_Keys_Information, &the_key->Object, 0 );
*key = the_key->Object.id;
_Objects_Allocator_unlock();
return 0;
}
Freechain_Control _POSIX_Keys_Keypool;
static uint32_t _POSIX_Keys_Get_keypool_bump_count( void )
{
uint32_t max;
max = _POSIX_Keys_Key_value_pair_maximum;
return _Objects_Is_unlimited( max ) ?
_Objects_Maximum_per_allocation( max ) : 0;
}
static uint32_t _POSIX_Keys_Get_initial_keypool_size( void )
{
uint32_t max;
max = _POSIX_Keys_Key_value_pair_maximum;
return _Objects_Maximum_per_allocation( max );
}
static void _POSIX_Keys_Initialize_keypool( void )
{
_Freechain_Initialize(
&_POSIX_Keys_Keypool,
_POSIX_Keys_Key_value_pairs,
_POSIX_Keys_Get_initial_keypool_size(),
sizeof( _POSIX_Keys_Key_value_pairs[ 0 ] )
);
}
POSIX_Keys_Key_value_pair * _POSIX_Keys_Key_value_allocate( void )
{
return (POSIX_Keys_Key_value_pair *) _Freechain_Get(
&_POSIX_Keys_Keypool,
_Workspace_Allocate,
_POSIX_Keys_Get_keypool_bump_count(),
sizeof( POSIX_Keys_Key_value_pair )
);
}
static void _POSIX_Keys_Run_destructors( Thread_Control *the_thread )
{
while ( true ) {
ISR_lock_Context lock_context;
RBTree_Node *node;
_Objects_Allocator_lock();
_POSIX_Keys_Key_value_acquire( the_thread, &lock_context );
node = _RBTree_Root( &the_thread->Keys.Key_value_pairs );
if ( node != NULL ) {
POSIX_Keys_Key_value_pair *key_value_pair;
pthread_key_t key;
void *value;
POSIX_Keys_Control *the_key;
void ( *destructor )( void * );
key_value_pair = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( node );
key = key_value_pair->key;
value = key_value_pair->value;
_RBTree_Extract(
&the_thread->Keys.Key_value_pairs,
&key_value_pair->Lookup_node
);
_POSIX_Keys_Key_value_release( the_thread, &lock_context );
_POSIX_Keys_Key_value_free( key_value_pair );
the_key = _POSIX_Keys_Get( key );
_Assert( the_key != NULL );
destructor = the_key->destructor;
_Objects_Allocator_unlock();
if ( destructor != NULL && value != NULL ) {
( *destructor )( value );
}
} else {
_POSIX_Keys_Key_value_release( the_thread, &lock_context );
_Objects_Allocator_unlock();
break;
}
}
}
static void _POSIX_Keys_Restart_run_destructors(
Thread_Control *executing,
Thread_Control *the_thread
)
{
(void) executing;
_POSIX_Keys_Run_destructors( the_thread );
}
static User_extensions_Control _POSIX_Keys_Extensions = {
.Callouts = {
.thread_restart = _POSIX_Keys_Restart_run_destructors,
.thread_terminate = _POSIX_Keys_Run_destructors
}
};
/**
* @brief This routine performs the initialization necessary for this manager.
*/
static void _POSIX_Keys_Manager_initialization(void)
{
_Objects_Initialize_information( &_POSIX_Keys_Information );
_POSIX_Keys_Initialize_keypool();
_User_extensions_Add_API_set( &_POSIX_Keys_Extensions );
}
RTEMS_SYSINIT_ITEM(
_POSIX_Keys_Manager_initialization,
RTEMS_SYSINIT_POSIX_KEYS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
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