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/*
* rtems_task_variable_get - Get a per-task variable
*
*
* COPYRIGHT (c) 1989-2007.
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/rtems/tasks.h>
#include <rtems/score/wkspace.h>
/*
* rtems_task_variable_get
*
* This directive gets the value of a task variable.
*/
rtems_status_code rtems_task_variable_get(
rtems_id tid,
void **ptr,
void **result
)
{
Thread_Control *the_thread;
Objects_Locations location;
rtems_task_variable_t *tvp;
if ( !ptr )
return RTEMS_INVALID_ADDRESS;
if ( !result )
return RTEMS_INVALID_ADDRESS;
the_thread = _Thread_Get (tid, &location);
switch (location) {
case OBJECTS_LOCAL:
/*
* Figure out if the variable is in this task's list.
*/
tvp = the_thread->task_variables;
while (tvp) {
if (tvp->ptr == ptr) {
/*
* Should this return the current (i.e not the
* saved) value if `tid' is the current task?
*/
*result = tvp->tval;
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
tvp = (rtems_task_variable_t *)tvp->next;
}
_Thread_Enable_dispatch();
return RTEMS_INVALID_ADDRESS;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
_Thread_Dispatch();
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
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