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Asked: 2026-05-23T03:12:12+00:00

I want to write a thread which runs tasks from an unlimited-size container of

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I want to write a thread which runs tasks from an unlimited-size container of tasks.

While the task-list is empty the thread trying to get a task should be blocked.

Coming from Linux I wanted to use condition variable which will be signaled on task adding and will be waited while the list is empty.

I found that CONDITION_VARIABLE is available only from windows Vista, so this is out of question.
Semaphores are problematic too due to the unlimited-size restriction.

Is there any apropriate subtitution?

Thanks

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1 Answer

  1. Editorial Team

    Why do you say that semaphores are problematic? Linux/Windows both have semaphores with a maximum count that can be realistically be described as ‘Unlimited’.

    Use James’ suggestion on Windows – it will work fine. Init. your semaphore with zero count. Add a task to your big (thread-safe), container, then signal the semaphore. In the thread, wait on the semaphore, then get a task from your container and process it. You can pass the semaphore instance to multiple threads if you wish – that will work OK as well.

    Rgds,
    Martin

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