rom/exec/setsignal.c

   1 /*
   2     Copyright © 1995-2015, 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 #include "exec_intern.h"
  13 #if defined(__AROSEXEC_SMP__)
  14 #include "etask.h"
  15 #endif
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20
  21         AROS_LH2(ULONG, SetSignal,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(ULONG, newSignals, D0),
  25         AROS_LHA(ULONG, signalSet,  D1),
  26
  27 /*  LOCATION */
  28         struct ExecBase *, SysBase, 51, Exec)
  29
  30 /*  FUNCTION
  31         Change or read the set of signals sent to the current task.
  32
  33     INPUTS
  34         newSignals - New values for the signals.
  35         signalSet  - Mask of signals affected by 'newSignals'.
  36
  37     RESULT
  38         Old signal set.
  39
  40     NOTES
  41
  42     EXAMPLE
  43
  44     BUGS
  45
  46     SEE ALSO
  47         AllocSignal(), FreeSignal(), Wait(), Signal(), SetExcept()
  48
  49     INTERNALS
  50
  51 ******************************************************************************/
  52 {
  53     AROS_LIBFUNC_INIT
  54
  55     struct Task *ThisTask = GET_THIS_TASK;
  56     ULONG *sig;
  57     ULONG old;
  58
  59     /* Protect the signal mask against access by other tasks. */
  60 #if defined(__AROSEXEC_SMP__)
  61     EXEC_SPINLOCK_LOCK(&IntETask(ThisTask->tc_UnionETask.tc_ETask)->iet_TaskLock, SPINLOCK_MODE_WRITE);
  62 #endif
  63     Disable();
  64
  65     /* Get address */
  66     sig = &ThisTask->tc_SigRecvd;
  67
  68     /* Change only the bits in 'mask' */
  69     old = *sig;
  70     *sig = (old & ~signalSet) | (newSignals & signalSet);
  71
  72 #if defined(__AROSEXEC_SMP__)
  73     EXEC_SPINLOCK_UNLOCK(&IntETask(ThisTask->tc_UnionETask.tc_ETask)->iet_TaskLock);
  74 #endif
  75     Enable();
  76
  77     return old;
  78     AROS_LIBFUNC_EXIT
  79 } /* SetSignal() */
  80