rom/exec/setsignal.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Examine and/or modify the signals of a task.
   6     Lang: english
   7 */
   8 #include <exec/execbase.h>
   9 #include <aros/libcall.h>
  10 #include <proto/exec.h>
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15
  16         AROS_LH2(ULONG, SetSignal,
  17
  18 /*  SYNOPSIS */
  19         AROS_LHA(ULONG, newSignals, D0),
  20         AROS_LHA(ULONG, signalSet,  D1),
  21
  22 /*  LOCATION */
  23         struct ExecBase *, SysBase, 51, Exec)
  24
  25 /*  FUNCTION
  26         Change or read the set of signals sent to the current task.
  27
  28     INPUTS
  29         newSignals - New values for the signals.
  30         signalSet  - Mask of signals affected by 'newSignals'.
  31
  32     RESULT
  33         Old signal set.
  34
  35     NOTES
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42         AllocSignal(), FreeSignal(), Wait(), Signal(), SetExcept()
  43
  44     INTERNALS
  45
  46 ******************************************************************************/
  47 {
  48     AROS_LIBFUNC_INIT
  49
  50     ULONG *sig;
  51     ULONG old;
  52
  53     /* Protect the signal mask against access by other tasks. */
  54     Disable();
  55
  56     /* Get address */
  57     sig=&SysBase->ThisTask->tc_SigRecvd;
  58
  59     /* Change only the bits in 'mask' */
  60     old=*sig;
  61     *sig=(old&~signalSet)|(newSignals&signalSet);
  62
  63     Enable();
  64
  65     return old;
  66     AROS_LIBFUNC_EXIT
  67 } /* SetSignal() */
  68