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LibJS: Implement Atomics.isLockFree

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Timothy Flynn 2021-07-12 10:35:14 -04:00 • committed by Linus Groh
parent d9c2447999
commit 1a3e1bff7b
4 changed files with 46 additions and 0 deletions
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19
Userland/Libraries/LibJS/Runtime/AtomicsObject.cpp
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@ -122,6 +122,7 @@ void AtomicsObject::initialize(GlobalObject& global_object)
define_native_function(vm.names.and_, and_, 3, attr);
define_native_function(vm.names.compareExchange, compare_exchange, 4, attr);
define_native_function(vm.names.exchange, exchange, 3, attr);
define_native_function(vm.names.isLockFree, is_lock_free, 1, attr);
define_native_function(vm.names.load, load, 2, attr);
define_native_function(vm.names.or_, or_, 3, attr);
define_native_function(vm.names.store, store, 3, attr);
@ -262,6 +263,24 @@ JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::exchange)
VERIFY_NOT_REACHED();
}
// 25.4.7 Atomics.isLockFree ( size ), https://tc39.es/ecma262/#sec-atomics.islockfree
JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::is_lock_free)
{
auto size = vm.argument(0).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
if (size == 1)
return Value(AK::atomic_is_lock_free<u8>());
if (size == 2)
return Value(AK::atomic_is_lock_free<u16>());
if (size == 4)
return Value(true);
if (size == 8)
return Value(AK::atomic_is_lock_free<u64>());
return Value(false);
}
// 25.4.8 Atomics.load ( typedArray, index ), https://tc39.es/ecma262/#sec-atomics.load
JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::load)
{