suspend and resume

[xiajing0228]

I am working on a program that has one function running, then interrupted by another function. After the interrupting function finishes, the original function should resume from the point where it gets interrupted.
How should i deal with this case?
I really appreciate it if someone can give me some suggestions to help a newbie out?

[D_C]

In assembly, there is a convenient instruction, usually named RETI, that is "return from interrupt".

How do you plan on generating the interrupt? I assume it's timer- or thread-generated interrupt. Otherwise, I don't see how it wouldn't happen at the same point in your code every time. In that case, you could call a subroutine. If you have the technology to generate interrupts, you should have the technology to return from interrupts.

[xiajing0228]

I want to use thread-generated interrupt.pleas e tell me what should i do?Thank you!

[Banfa]

You don't need to do anything, just start your 2 threads, the OS should handle swopping between them for you.

If there are sections of code that need to run exclusively (i.e. while 1 thread is running them the other thread can not be allowed to also run them) then use semaphore (or mutex or critical section on windows) prtection to prevent more than 1 thread at a time running the code.