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cmultithreadingparent

How to send a variable/information between threads

I need to know how a thread can send its ID to another thread before it goes to wait state. I thought to pass a variable with its ID but I don't know how to do it.

Solution

  • If it's only one thread and its parent, you could use a global variable, as they are shared between all threads. Make it volatile in case you expect concurrent access.

    EDIT: I'm not sure if you're using POSIX threads on Linux but you probably have a way to pass a pointer (e.g. to a struct) when creating the thread. It could contain a variable to store its ID or a pointer to a function to call on the parent thread. I know you can do it with Windows threads.