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Editorial Team
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Asked: 2026-05-27T17:39:32+00:00

I have an application where I need to query a database to get/put information.

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I have an application where I need to query a database to get/put information. I can’t do it synchronously as it would block my entire process until the function returns.

Basically I have a few functions that run one or more queries at certain points.

fun
    stuff1
    stuff2
    stuff3

    query1
    stuff4

    query2
    stuff5

  • I could start the functions in separate threads, but then I would have to lock everything to prevent races (I think locking could be slow ?)

  • I could start the queries asynchronously and monitor them but then I would have to split my functions and use callbacks that would run when the qouery is over

I am interested in a general solution, but my platform is POSIX and the database is (unfortunately) mysql.

What would you do ? How would you handle this ?

Thank you for your time.

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1 Answer

  1. Editorial Team

    There are patterns that have been known and used for quite sometime and I believe they have not changed.

    1. Running independent functions: Use different threads
    2. Running independent functions and a then function dependent on all of them: Use different threads and joining them at the end – synchronise them. I do not know about POSIX but in .NET we have EventWaitHandle that can wait for multiple threads and notify when all finished.
    3. Running functions that each depends on another: run on a single background thread and chain the callbacks. Again .NET offers Task<T> chaining which makes reading and writing the code much simpler. jquery now offers promise which is the same thing.
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