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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [taskvariableadd.c] - Rev 1765
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/* * rtems_task_variable_add - Add 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: taskvariableadd.c,v 1.2 2001-09-27 11:59:19 chris Exp $ */ #include <rtems/system.h> #include <rtems/rtems/tasks.h> #include <rtems/score/wkspace.h> /* * rtems_task_variable_add * * This directive registers a task variable. */ rtems_status_code rtems_task_variable_add( rtems_id tid, void **ptr, void (*dtor)(void *) ) { Thread_Control *the_thread; Objects_Locations location; rtems_task_variable_t *tvp, *new; 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: /* * Figure out if the variable is already in this task's list. */ tvp = the_thread->task_variables; while (tvp) { if (tvp->ptr == ptr) { tvp->dtor = dtor; _Thread_Enable_dispatch(); return RTEMS_SUCCESSFUL; } tvp = tvp->next; } /* * Now allocate memory for this task variable. */ new = (rtems_task_variable_t *) _Workspace_Allocate(sizeof(rtems_task_variable_t)); if (new == NULL) { _Thread_Enable_dispatch(); return RTEMS_NO_MEMORY; } new->gval = *ptr; new->ptr = ptr; new->dtor = dtor; new->next = the_thread->task_variables; the_thread->task_variables = new; _Thread_Enable_dispatch(); return RTEMS_SUCCESSFUL; } return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ }