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Asked: 2026-05-25T21:57:14+00:00

Here’s the situation, I have a thread running that is partially controlled by code

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Here’s the situation, I have a thread running that is partially controlled by code that I don’t own. I started the thread so I have it’s thread id but then I passed it off to some other code. I need to be able to tell if that other code has currently caused the thread to block from another thread that I am in control of. Is there are way to do this in pthreads? I think I’m looking for something equivalent to the getState() method in Java’s Thread class (http://download.oracle.com/javase/6/docs/api/java/lang/Thread.html#getState() ).

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It’s ok if the solution is platform dependent. I’ve already found a solution for linux using the /proc file system.

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  1. Editorial Team

    You could write wrappers for some of the pthreads functions, which would simply update some state information before/after calling the original functions. That would allow you to keep track of which threads are running, when they’re acquiring or holding mutexes (and which ones), when they’re waiting on which condition variables, and so on.

    Of course, this only tells you when they’re blocked on pthreads synchronization objects — it won’t tell you when they’re blocking on something else.

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