iOS Question How do asynchronous background threads work?

[JackKirk]

Hi,

I have just successfully implemented Narek Adonts' "Background Task" class:

https://www.b4x.com/android/forum/t...d-without-blocking-the-ui-asynchronous.64081/

which is quite an intriguing bit of code - brilliant if you have a use for it as I do.

It has set me to thinking about just what exactly is happening.

The class obviously allows you to run another thread asynchronously with the main thread - but where? can you run multiple background threads simultaneously?

My iPhone 4s apparently has a dual core processor - do the threads run on one core? one thread on each core? either? is there any way to monitor what is happening?

Any pointers to good references? - I googled without success.

Regards...

 

[narek adonts]

I am not sure but I think it is putting the task in a queue so you can run a lot of them.

 

[JackKirk]

Sat down and did a bit of swatting - this looks pretty much like it covers everything:

https://developer.apple.com/library...ogrammingGuide/Introduction/Introduction.html

in more depth than I was really after. In particular this:

https://developer.apple.com/library...html#//apple_ref/doc/uid/TP40008091-CH102-SW1

seems to cover the mechanism Narek is using in his "Background Task" class.

Regards...