mimalloc 2.1.9 build failure with Visual Studio

[jabamaus]

VS2022 is complaining that mi_atomic_exchange_ptr_relaxed is not defined when _MSC_VER is defined. Looking at the definitions in atomic.h it seems that that is the case. Note that I am doing my own build without cmake but even so I can't see how mimalloc could ever compile...

1>segment-map.c 1>C:\james_projects\GitHub\jrf\libs\mimalloc\src\segment-map.c(131,30): warning C4013: 'mi_atomic_exchange_ptr_relaxed' undefined; assuming extern returning int 1>C:\james_projects\GitHub\jrf\libs\mimalloc\src\segment-map.c(131,61): error C2275: 'mi_segmap_part_t': expected an expression instead of a type 1>C:\james_projects\GitHub\jrf\libs\mimalloc\src\segment-map.c(131,23): warning C4047: 'initializing': 'mi_segmap_part_t *' differs in levels of indirection from 'int'

Thanks :)

[daanx]

Yikes -- this is because in the IDE and cmake we always build in C++ mode with msvc. I have various special wrappers in atomic.h to enable C compilation on msvc as well but forgot the latest variants :-( I will update this and push a fresh release later this week (in case more issues pop up in the mean time).

Thanks!

[daanx]

I think this is fixed (in dev for now) with commit 5764845 -- let me know if this works for you.

[jabamaus]

Yes that works. Thank you :)