rom/exec/setintvector.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Install an interrupt handler.
   6     Lang: english
   7 */
   8 #include <exec/execbase.h>
   9 #include <exec/interrupts.h>
  10 #include <proto/exec.h>
  11 #include <aros/libcall.h>
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16
  17         AROS_LH2(struct Interrupt *, SetIntVector,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(ULONG,              intNumber, D0),
  21         AROS_LHA(struct Interrupt *, interrupt, A1),
  22
  23 /*  LOCATION */
  24         struct ExecBase *, SysBase, 27, Exec)
  25
  26 /*  FUNCTION
  27
  28     INPUTS
  29
  30     RESULT
  31
  32     NOTES
  33
  34     EXAMPLE
  35
  36     BUGS
  37
  38     SEE ALSO
  39
  40     INTERNALS
  41
  42 ******************************************************************************/
  43 {
  44     AROS_LIBFUNC_INIT
  45     struct Interrupt *oldint;
  46     BOOL ishandler = intNumber <= 2 || (intNumber >= 6 && intNumber <= 12);
  47
  48     Disable ();
  49
  50     oldint = (struct Interrupt *)SysBase->IntVects[intNumber].iv_Node;
  51     SysBase->IntVects[intNumber].iv_Node = ishandler ? (struct Node *)interrupt : NULL;
  52
  53     if (interrupt)
  54     {
  55         SysBase->IntVects[intNumber].iv_Data = interrupt->is_Data;
  56         SysBase->IntVects[intNumber].iv_Code = interrupt->is_Code;
  57     }
  58     else
  59     {
  60         SysBase->IntVects[intNumber].iv_Data = (APTR)~0;
  61         SysBase->IntVects[intNumber].iv_Code = (void *)~0;
  62     }
  63
  64     Enable ();
  65
  66     return oldint;
  67
  68     AROS_LIBFUNC_EXIT
  69 } /* SetIntVector */