I get the error 'jl_atomic_load_relaxed: identifier not found.'

[ytecer]

I am using Julia 1.6.0-rc1. As stated at https://docs.julialang.org/en/v1/manual/embedding/, I made the necessary settings in Visual Studio 2019, but when I compile the code, I get the error 'jl_atomic_load_relaxed: identifier not found.'

Code:

#include <uv.h>
#include <Windows.h>
#include <julia.h>

int main(int argc, char* argv[])
{
    jl_init();
    jl_eval_string("print(sqrt(2.0))");
    jl_atexit_hook(0);
    return 0;
}

Error:

'jl_atomic_load_relaxed': identifier not found    julia.h     880
'jl_atomic_load_relaxed': identifier not found    julia.h     924
'jl_atomic_load_relaxed': identifier not found    locks.h   24
'jl_atomic_load_relaxed': identifier not found    locks.h   40

[Keno]

Looks like the MSVC versions of these are missing from atomics.h

[ytecer]

Thank you for your answer. I think the following lines should be added to Atomics.h file.

template<typename T>
static inline T jl_atomic_load_relaxed(volatile T *obj)
{
 #code....
 #code....
}

[balenamiaa]

Is there a reason compiler builtins are used instead of a higher level abstraction like stdatomic.h or mintomic?

[toivoh]

I got it to work with

template<typename T>
static inline T jl_atomic_load_relaxed(volatile T *obj)
{
    return jl_atomic_load_acquire(obj);
}

I guess this is not ideal, since jl_atomic_load_acquire should be stronger than jl_atomic_load_relaxed, but at least that means that is should work.

Some googling led me to believe that InterlockedOrNoFence might be used instead in MSVC, but I'm not sure enough about the details to try it myself.

[toivoh]

I also had to handle #34201 to get embedding to work (tried with Julia 1.6.0 in MSVC 2017), described what I did in that issue.

[vtjnash]

Duplicate of #42098, fixed by #42152