man XtAppAddInput (Fonctions bibliothèques) - register and remove an input source

NAME

XtAppAddInput, XtRemoveInput - register and remove an input source

SYNTAX

XtInputId XtAppAddInput(XtAppContext app_context, int source, XtPointer condition, XtInputCallbackProc proc, XtPointer client_data); void XtRemoveInput(XtInputId id);

ARGUMENTS

app_context
Specifies the application context .
client_data
Specifies the argument that is to be passed to the specified procedure when .
condition
Specifies the mask that indicates a read, write, or exception condition or some operating system dependent condition.
id
Specifies the ID returned from the corresponding call.
proc
Specifies the procedure that is.
source
Specifies the source file descriptor on a UNIX-based system or other operating system dependent device specification.

DESCRIPTION

The function registers with the read routine a new source of events, which is usually file input but can also be file output. Note that file should be loosely interpreted to mean any sink or source of data. also specifies the conditions under which the source can generate events. When input is pending on this source, the callback procedure is called.

The legal values for the condition argument are operating-system dependent. On a UNIX-based system, the condition is some union of and The function causes the read routine to stop watching for input from the input source.

SEE ALSO

XtAppAddTimeOut(3),XtAppAddSignal(3)



BUGS

In ANSI C it is necessary to cast the condition to an XtPointer, e.g.:

XtAppAddInput(app_context,

source,

(XtPointer) (XtInputReadMask | XtInputWriteMask),

proc,

client_data);