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make C++ atomic opt in via -d:nimUseCppAtomics (#24209)

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refs #24207

The `-d:nimUseCAtomics` flag added in #24207 is now inverted and made
into `-d:nimUseCppAtomics`, which means C++ atomics are only enabled
with the define. This flag is now also documented and tested.
This commit is contained in:
metagn
2024-09-30 21:54:07 +03:00
committed by GitHub
parent 2a48182288
commit b82ff5a87b
4 changed files with 13 additions and 4 deletions
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5
lib/pure/concurrency/atomics.nim
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@@ -10,6 +10,9 @@
## Types and operations for atomic operations and lockless algorithms.
##
## Unstable API.
##
## By default, C++ uses C11 atomic primitives. To use C++ `std::atomic`,
## `-d:nimUseCppAtomics` can be defined.
runnableExamples:
# Atomic
@@ -50,7 +53,7 @@ runnableExamples:
flag.clear(moRelaxed)
assert not flag.testAndSet
when (defined(cpp) and not defined(nimUseCAtomics)) or defined(nimdoc):
when (defined(cpp) and defined(nimUseCppAtomics)) or defined(nimdoc):
# For the C++ backend, types and operations map directly to C++11 atomics.
{.push, header: "<atomic>".}