Code explanation for absence of stdatomic.h for python build

Python Help
22

None of these compile for C on NonStop.

23

What about the atomic intrinsics mentioned in the HPE docs?

For example:

#include <stdio.h>
#include <stdint.h>

int main(void) {
    int32_t x = 0;
    int32_t old = _atmAdd32(&x, 1);
    printf("_atmAdd32 %d %d\n", (int)old, (int)x);
    return 0;
}
24

Yes, this might compile, I have seen these declarations in a header file.

25

This compiled fine for NonStop. So you are suggesting to use these atomic intrinsics in place of atomics in pyatomic_std.h. Although I doubt there is full support. To begin with this can be done.

26

Yes, I’m suggesting you implement the pyatomic.h functions in terms of the available atomic intrinsics.

1 Like
27

Thank you @colesbury , @Rosuav for your help, much appreciated.

1 Like
28

I’d also suggest not writing special _acquire/_release/_relaxed functions. Those are optimisations so it’ll work fine if you fall back to the plain version.

29

Noted, Thanks.:+1: