9bcb4159ef
Final whole-stream adversarial review came back CLEAN (no CRITICAL/MEDIUM/LOW). Close the one informational gap it noted: extend examples/1703 with a #run comptime swap so swap's comptime VM arm is locked (742, matches runtime) — every op now has comptime↔runtime corpus coverage. Docs: PLAN-ATOMICS.md status banner (COMPLETE); PLAN-POST-METATYPE.md Stream A marked done (unblocks B2-channels + C-parallel); readme.md gains a user-facing Atomics section. Suite green (721/0).
17 lines
699 B
Plaintext
17 lines
699 B
Plaintext
// Atomic($T).swap — atomic exchange (LLVM atomicrmw xchg): store the new value,
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// return the OLD one. Stream A (atomics) A.3. Single-thread.
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// Covers swap at BOTH comptime (#run) and runtime — they must agree.
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#import "modules/std.sx";
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#import "modules/std/atomic.sx";
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c_swap :: () -> i64 { a := Atomic(i64).init(7); old := a.swap(42, .seq_cst); return old * 100 + a.load(.seq_cst); }
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G_SWAP :: #run c_swap(); // 742 (old 7, now 42)
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main :: () {
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a := Atomic(i64).init(7);
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old := a.swap(42, .acq_rel);
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print("swap old: {}\n", old); // 7
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print("swap now: {}\n", a.load(.acquire)); // 42
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print("comptime swap: {}\n", G_SWAP); // 742 (matches runtime)
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}
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