rom/exec/gettaskstorageslot.c

   1 /*
   2     Copyright © 2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7
   8 #include <exec/nodes.h>
   9 #include <exec/lists.h>
  10 #include <clib/macros.h>
  11
  12 #include "exec_intern.h"
  13 #include "taskstorage.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18 #include <proto/exec.h>
  19
  20         AROS_LH1(IPTR, GetTaskStorageSlot,
  21
  22 /*  LOCATION */
  23         AROS_LHA(LONG, id, D0),
  24         struct ExecBase *, SysBase, 185, Exec)
  25
  26 /*  FUNCTION
  27         Get a value for a task storage slot.
  28
  29     INPUTS
  30         id - slot ID returned from AllocTaskStorageSlot().
  31
  32     RESULT
  33         Value stored by SetTaskStorageSlot(), or (IPTR)NULL if the slot was
  34         never used.
  35
  36     NOTES
  37
  38     EXAMPLE
  39
  40     BUGS
  41
  42     SEE ALSO
  43         AllocTaskStorageSlot(), FreeTaskStorageSlot(), SetTaskStorageSlot()
  44
  45     INTERNALS
  46
  47 ******************************************************************************/
  48 {
  49     AROS_LIBFUNC_INIT
  50
  51     struct ETask *et = GetETask(FindTask(NULL));
  52     IPTR *ts;
  53
  54     D(bug("GetTaskStorage: %p: Get TaskStorageSlot %d\n", et, id));
  55
  56     if (!et) {
  57         /* Only ETasks can do this */
  58         D(bug("GetTaskStorage: Not an ETask!\n"));
  59         return (IPTR)NULL;
  60     }
  61
  62     ts = et->et_TaskStorage;
  63     if (ts == NULL || ts[__TS_FIRSTSLOT] <= id) {
  64         D(bug("GetTaskStorage: ID %d was not set!\n", id));
  65         return (IPTR)NULL;
  66     }
  67
  68     return ts[id];
  69
  70     AROS_LIBFUNC_EXIT
  71 }