I have an multithreading application. I want to embed “Julia” into it so that it can be accessed from any thread. There are many questions: whether you need to protect calls through CriticalSection or Mutex is there a built-in mechanism for determining whether or not Julia is busy what initializat…

In the mean time, something like this https://gist.github.com/cdsousa/473463e9b4e4f57c5b598e6966ca6a21 can be used to partially workaround the current limitations.

[image] yuyichao: for your definition The meaning of the term “thread safe” certainly varies depending on the context that it is being used. So can I quote you with this statement: “The julia embedding C API is thread safe” Because this is what the OP asked about. It was not asked if Julia…

[image] tobias.knopp: So can I quote you with this statement: “The julia embedding C API is thread safe” Yes. [image] tobias.knopp: Because this is what the OP asked about. It was not asked if Julia internally is thread safe, it was asked about embedding of Julia. No. he is from the …

define what you mean with “external thread”.

Thread external to Julia, I.e those that are not the Julia main thread and isn’t started by Julia.

(usually I’ll say unmanaged, I just use external since I felt like it could be easier for someone not knowing Julia internal to understand)

We are talking about embedding here. So lets say I start two pthreads. One of that calls jl_init. Is it ok that the two thread call jl_* (except j_init) concurrently after that?

No, because the other thread is not managed by julia. Not sure what you are getting at here but just to be clear, I’ve never said that what he want to do is possible or safe to do. As said above, I was only correcting, [image] tobias.knopp: Julia is not thread safe. That should actually answer…

[image] Maxim_Kuznetsov: I want to embed “Julia” into it so that it can be accessed from any thread. read: any thread. You have an interesting definition that the Julia API is thread safe because it is allowed to use it concurrently from a certain subsets of all threads. I am a lot more cons…

[image] tobias.knopp: read: any thread. Read: not “thread safety”. [image] tobias.knopp: You have an interesting definition that the Julia API is thread safe because it is allowed to use it concurrently from a certain subsets of all threads. You have an interesting definition that the…

Embedding Julia into multithreading apps

Internals & Design

Ronis_BR January 27, 2019, 3:08pm 21

No, I didn’t mean from julia, but from C to Julia. Something like that: the user click on a button that dispatch a job to Julia thread and wait it to be finished.

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Embedding Julia into multithreading apps

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