atomic.h: Add C11 implmentation of atomic operations
#13799
Conversation
Do you mean Solaris by Oracle here? |
I used Oracle to describe whatever compiler that evals Edit:
cpredef/predef claims Solaris, SunOS and illumos Should I change it to Solaris? |
At least illumos is based on OpenSolaris and not owned by Oracle. |
|
If |
I haven't said that Solaris is not preferable, at all, and the word Solaris is not in your commit log. |
Sorry for the confusion, reworded and rebased. |
727c4f0 to
ea5a308
Compare
These branches are only active for 32-bit Windows and Solaris platforms, codify the fact by changing `#else` to `#elif`'s that explicitly include those targets and `#error`-out otherwise.
The implementation is only active if `HAVE_STDATOMIC_H` is defined, and only after the compiler fails to match all currently supported systems.
Introduce an implementation of atomic operations with C11 _Atomic qualifier and <stdatomic.h> functions. This allows C compilers relying on C11 model as the sole atomic interface to compile Ruby. The existing configure definition
HAVE_STDATOMIC_His used as the feature switch.To be as non-intrusive as possible, new
#elifblocks are consistently positioned right before#error, all currently supported systems are expected to be unaffected by the change, that is, no additional#includeor library dependency or raising of-stdversion.Several
#elsebranches that were only used for 32-bit Windows and Oracle platforms are changed to explicit#elif Win || Oracleto maintain a consistent order of implementation branches.