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// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend %s -parse-as-library -enable-experimental-feature Embedded -disable-availability-checking -c -o %t/main.o
// RUN: %target-clang %t/main.o -o %t/a.out -dead_strip
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
// REQUIRES: synchronization
import Synchronization
@main
struct Main {
static let x = Atomic(128)
static func main() {
let old = x.load(ordering: .relaxed)
x.store(42, ordering: .relaxed)
let new = x.load(ordering: .relaxed)
print(old) // CHECK: 128
print(new) // CHECK: 42
let old2 = x.exchange(12, ordering: .acquiring)
print(old2) // CHECK: 42
let (exchanged, original) = x.compareExchange(expected: 128, desired: 316, ordering: .sequentiallyConsistent)
print(exchanged) // CHECK: false
print(original) // CHECK: 12
let (exchanged2, original2) = x.compareExchange(expected: 12, desired: 316, ordering: .sequentiallyConsistent)
print(exchanged2) // CHECK: true
print(original2) // CHECK: 12
}
}
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