difference between signal and event

[sukhdeepmankoo]

Hi,
Can any body tell me, what is the difference between signal and event and which situation can we use signal and event.
Thanks.

 

[shhrikant1]

An event is often a collection of signals and certain conditions.



for eg.
A button emits a "clicked" event when the mouse button is clicked

The Mouse-down event fires the Mouse-down signal. The difference
here would be the user causes events, which emit signals, which are
handled by the application. But the application can fire signals
itself, without user input.

 

[amraldo]

In what context are you talking?
--
Amr Ali

 

[ariyan]

A signal is mainly a callback mechanism. It's a way
for one object to register it's interest in being notified of another
objects action or state change. You register your interest by providing
a callback, when the object "emits a signal" it simply iterates over the
list of callbacks which have been registered with it and calls the
callback passing some predefined data with it.

An event is an almost one-to-one mapping of window system events. Window
system events are things like "key press" or "window move". Window
system events are reported to the applications main loop. GDK/GTK
interprets the window system events passes them along to you.

 

[nikhilele]

In what context are you talking?

I think he is asking in context to RTOS.. in which signal and events are handled by some algorithm..

 

[saubhik]

Friends ....
I think this thread will really enlighten our thought process in this particular topic ....
**broken link removed**

And "sukhdeepmankoo" thanks to you for asking such a question which is really somewhat different from our as usual theoretical questions .

Regards,
SD