rom/exec/freesignal.c

   1 /*
   2     Copyright © 1995-2009, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Free a signal.
   6     Lang: english
   7 */
   8 #include <exec/execbase.h>
   9 #include <exec/tasks.h>
  10 #include <aros/libcall.h>
  11 #include <proto/exec.h>
  12
  13 #include "exec_intern.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18
  19         AROS_LH1(void, FreeSignal,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(LONG, signalNum, D0),
  23
  24 /*  LOCATION */
  25         struct ExecBase *, SysBase, 56, Exec)
  26
  27 /*  FUNCTION
  28         Free a signal allocated with AllocSignal().
  29
  30     INPUTS
  31         signalNum - Number of the signal to free or -1 to do nothing.
  32
  33     RESULT
  34
  35     NOTES
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42         AllocSignal(), Signal(), Wait()
  43
  44     INTERNALS
  45
  46 ******************************************************************************/
  47 {
  48     AROS_LIBFUNC_INIT
  49
  50     if(signalNum!=-1)
  51     {
  52         /* No more atomic problem - i beleive THIS is atomic. - sonic */
  53         struct Task *me = GET_THIS_TASK;
  54
  55         /* Clear the bit */
  56         if (me)
  57             me->tc_SigAlloc &= ~(1 << signalNum);
  58     }
  59     AROS_LIBFUNC_EXIT
  60 } /* FreeSignal() */
  61