zig/test/cases/atomics.zig

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fn cmpxchg() {
@setFnTest(this);
var x: i32 = 1234;
while (!@cmpxchg(&x, 1234, 5678, AtomicOrder.SeqCst, AtomicOrder.SeqCst)) {}
assert(x == 5678);
}
fn fence() {
@setFnTest(this);
var x: i32 = 1234;
@fence(AtomicOrder.SeqCst);
x = 5678;
}
// TODO const assert = @import("std").debug.assert;
fn assert(ok: bool) {
if (!ok)
@unreachable();
}