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/*
* rtems_task_variable_delete - Delete a per-task variable
*
*
* COPYRIGHT (c) 1989-1999.
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/rtems/tasks.h>
#include <rtems/score/wkspace.h>
/*
* rtems_task_variable_delete
*
* This directive removes a task variable.
*/
rtems_status_code rtems_task_variable_delete(
rtems_id tid,
void **ptr
)
{
Thread_Control *the_thread;
Objects_Locations location;
rtems_task_variable_t *tvp, *prev;
prev = NULL;
the_thread = _Thread_Get (tid, &location);
switch (location) {
case OBJECTS_REMOTE:
#if defined(RTEMS_MULTIPROCESSING)
_Thread_Dispatch();
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
case OBJECTS_ERROR:
return RTEMS_INVALID_ID;
default:
return RTEMS_INTERNAL_ERROR;
case OBJECTS_LOCAL:
tvp = the_thread->task_variables;
while (tvp) {
if (tvp->ptr == ptr) {
if (prev) prev->next = tvp->next;
else the_thread->task_variables = tvp->next;
if (_Thread_Is_executing (the_thread))
*tvp->ptr = tvp->gval;
_Thread_Enable_dispatch();
_Workspace_Free(tvp);
return RTEMS_SUCCESSFUL;
}
prev = tvp;
tvp = tvp->next;
}
_Thread_Enable_dispatch();
return RTEMS_INVALID_ADDRESS;
}
return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
}
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