creating custom event / signal on cocoa os x

I am not much familiar with developing application using cocoa on mac. Can some one help me with how can i create custom e开发者_StackOverflow社区vents or signals, and how to make sure thread acts when these are generated or triggered.

Any help will be appreciated.

I found the way to register/send/receive notification. you can write logic to react on these events. More info can be found at: Notification programming guide for cocoa