dca396ed1f
compare_exchange/_weak wired end-to-end except LLVM emission (bails loudly;
A.2b makes it real). New IR op atomic_cmpxchg + AtomicCmpxchg{ptr, cmp, new,
val_ty, success_ordering, failure_ordering, weak}; result type = ?T (null =
SUCCESS, failure carries the actual value for retry). print arm; emit dispatch
-> emitAtomicCmpxchg (BAILS). comptime_vm arm does real single-thread CAS (read
actual / compare / store-on-equal / build ?T: success->none, failure->some;
weak == strong at comptime). Recognizer extended (atomic_cmpxchg/_weak, 6 args)
-- CAS restricted to INTEGER T (loud reject); BOTH orderings resolved via
atomicOrderingFromNode; dual-ordering validation (failure may not be
release/acq_rel nor stronger than success, via atomicOrderingRank). Methods
compare_exchange/_weak on Atomic($T) with comptime $success/$failure: Ordering.
examples/1702 locked to the bail; examples/1186 locks a rejected ordering pair.
Suite green (718/0).
6 lines
595 B
Plaintext
6 lines
595 B
Plaintext
error: atomic compare-exchange failure ordering ('.seq_cst') cannot be stronger than the success ordering ('.relaxed')
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--> /Users/agra/projects/sx/library/modules/std/atomic.sx:79:188
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79 | compare_exchange :: (self: *Atomic(T), expected: T, desired: T, $success: Ordering, $failure: Ordering) -> ?T { return atomic_cmpxchg(T, @self.value, expected, desired, success, failure); }
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| ^^^^^^^
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