How to set nthreads for library at load time #152
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Since I didn't want to be stuck on an older JuliaC version, in Deltares/Ribasim#3151 I added
c_sources = ["build/set_julia_threads.c"]which adds C API to our library to set the number of threads before Julia is initialized. When nthreads > 1, signal handling is turned on as well.
In #113 the number of threads is set to 1, with the option to change it at compile time.
I am compiling Julia code to a library with JuliaC, and used to set the threads at runtime from a Rust CLI by setting JULIA_NUM_THREADS, which worked fine (code here if interested).
I'm fine with defaulting to 1, but I don't see how I can control it at runtime. I see
testset "jl_options applied at runtime (library)"but that only seems to read out the values at runtime.Or should really not do this? I don't understand what in #112 is meant by
until it has multi-threading / chained signal support. EDIT: just found JuliaLang/julia#61319