rom/dos/checksignal.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Checks for signals in a mask.
   6     Lang: english
   7 */
   8 #include <exec/tasks.h>
   9 #include <proto/exec.h>
  10 #include "dos_intern.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/dos.h>
  16
  17         AROS_LH1(LONG, CheckSignal,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(LONG, mask, D1),
  21
  22 /*  LOCATION */
  23         struct DosLibrary *, DOSBase, 132, Dos)
  24
  25 /*  FUNCTION
  26         Checks the current task to see if any of the signals specified in
  27         the mask have been set. The mask of all signals which were set is
  28         returned. The signals specified in the mask will be cleared.
  29
  30     INPUTS
  31         mask - The signal mask to check.
  32
  33     RESULT
  34         The mask of all signals which were set.
  35
  36     NOTES
  37
  38     EXAMPLE
  39
  40     BUGS
  41
  42     SEE ALSO
  43
  44     INTERNALS
  45
  46 *****************************************************************************/
  47 {
  48     AROS_LIBFUNC_INIT
  49
  50     LONG rcvd;
  51
  52     /* Get pointer to current task structure */
  53     struct Task *me = FindTask(NULL);
  54
  55     /* Protect the signal mask against access by other tasks. */
  56     Disable();
  57
  58     /* Get active signals specified in mask */
  59     rcvd = me->tc_SigRecvd & mask;
  60
  61     /* And clear them. */
  62     me->tc_SigRecvd &= ~mask;
  63
  64     /* All done. */
  65     Enable();
  66
  67     return rcvd;
  68
  69     AROS_LIBFUNC_EXIT
  70 } /* CheckSignal */