Copyright (c) 1993, 1994 X Consortium

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not
be used in advertising or otherwise to promote the sale, use or other
dealing in this Software without prior written authorization from the
X Consortium.

XtAppAddSignal, XtRemoveSignal, XtNoticeSignal - register and remove a signal source #include <X11/Intrinsic.h>

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

void XtRemoveSignal(XtSignalId id);

void XtNoticeSignal(XtSignalId id);

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. The XtAppAddSignal function initiates a mechanism for handling signals within the context of the Intrinsics. Prior to establishing an operating 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 XtAppAddSignal .

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 callback 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 .

XtAppAddTimeOut(__libmansuffix__),XtAppAddInput(__libmansuffix__),XtAppAddWorkProc(__libmansuffix__)

\*(xT

\*(xL