osf1 man page for xtremovesignal

XtAppAddSignal(3Xt)													       XtAppAddSignal(3Xt)

NAME
       XtAppAddSignal, XtRemoveSignal, XtNoticeSignal - register and remove a signal source

SYNOPSIS
       XtSignalId XtAppAddSignal(app_context, proc, client_data)
	       XtAppContext app_context;
	       XtSignalCallbackProc proc;
	       XtPointer client_data;

       void XtRemoveSignal(id)
	       XtSignalIdid;

       void XtNoticeSignal(id)
	       XtSignalId id;

ARGUMENTS
       Specifies  the  application context.  Specifies the argument that is to be passed to the specified procedure when a signal has been raised.
       Specifies the ID returned from the corresponding XtAppAddSignal call.  Specifies the procedure that is to be called  when  the  signal  has
       been raised.

DESCRIPTION
       The XtAppAddSignal function initiates a mechanism for handling signals within the context of the Intrinsics. Prior to establishing an oper-
       ating system dependent signal handler the application may call XtAppAddSignal and store the returned id in a place accessible to the signal
       handler.

       Upon  receipt  of  a signal from the operating system, the application may call XtNoticeSignal passing the id returned by the call to XtAp-
       pAddSignal.

       XtNoticeSignal is the only Intrinsics function that can safely be called from a signal handler. If XtNoticeSignal is called multiple  times
       before  the  Intrinsics	are  able  to  invoke the registered callback, the callback is only called once. Logically the Intrinsics maintain
       "pending" for each registered callback. This flag is initially False and is set to True by XtNoticeSignal; the Intrinsics invoke the  call-
       back whenever the flag is True, and the flag is set to False just before the callback is invoked.

       The XtRemoveSignal function is called to remove the specified Intrinsics signal handler. The client should disable the source of the signal
       before calling XtRemoveSignal.

SEE ALSO
       XtAppAddTimeOut(3Xt), XtAppAddInput(3Xt), XtAppAddWorkProc(3Xt),

       X Toolkit Intrinsics -- C Language Interface

       Xlib -- C Language X Interface

															       XtAppAddSignal(3Xt)