Implement Atomics.pause (#1929)

Jint.Tests.Test262/Test262Harness.settings.json

@@ -1,5 +1,5 @@
 {
-  "SuiteGitSha": "b8cb40b66a61afd57550a84f4170e16ebfbd1e46",
+  "SuiteGitSha": "242f6f98f0f86c0a3276929b4a450438526057cb",
   //"SuiteDirectory": "//mnt/c/work/test262",
   "TargetPath": "./Generated",
   "Namespace": "Jint.Tests.Test262",
@@ -16,6 +16,7 @@
     "regexp-modifiers",
     "regexp-unicode-property-escapes",
     "regexp-v-flag",
+    "RegExp.escape",
     "source-phase-imports",
     "tail-call-optimization",
     "Temporal",

Jint/Native/Atomics/AtomicsInstance.cs

@@ -0,0 +1,66 @@
+using System.Numerics;
+using System.Threading;
+using Jint.Collections;
+using Jint.Native.Object;
+using Jint.Runtime;
+using Jint.Runtime.Descriptors;
+using Jint.Runtime.Interop;
+
+namespace Jint.Native.Atomics;
+
+/// <summary>
+/// https://tc39.es/ecma262/#sec-atomics-object
+/// </summary>
+internal sealed class AtomicsInstance : ObjectInstance
+{
+    private readonly Realm _realm;
+
+    public AtomicsInstance(
+        Engine engine,
+        Realm realm,
+        ObjectPrototype objectPrototype) : base(engine)
+    {
+        _realm = realm;
+        _prototype = objectPrototype;
+    }
+
+    protected override void Initialize()
+    {
+        var properties = new PropertyDictionary(1, checkExistingKeys: false)
+        {
+            ["pause"] = new(new ClrFunction(Engine, "pause", Pause, 0, PropertyFlag.Configurable), true, false, true),
+        };
+        SetProperties(properties);
+    }
+
+    private JsValue Pause(JsValue thisObject, JsValue[] arguments)
+    {
+        var iterationNumber = arguments.At(0);
+        if (!iterationNumber.IsUndefined())
+        {
+            if (!iterationNumber.IsNumber())
+            {
+                ExceptionHelper.ThrowTypeError(_realm, "Invalid iteration count");
+            }
+
+            var n = TypeConverter.ToNumber(iterationNumber);
+            if (!TypeConverter.IsIntegralNumber(n))
+            {
+                ExceptionHelper.ThrowTypeError(_realm, "Invalid iteration count");
+            }
+
+            if (n < 0)
+            {
+                ExceptionHelper.ThrowRangeError(_realm, "Invalid iteration count");
+            }
+
+            Thread.SpinWait((int) n);
+        }
+        else
+        {
+            Thread.SpinWait(1);
+        }
+
+        return Undefined;
+    }
+}

Jint/Native/Global/GlobalObject.Properties.cs

@@ -86,7 +86,7 @@ public partial class GlobalObject
         properties.AddDangerous(propertyAggregateError, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.AggregateError, PropertyFlags));
         properties.AddDangerous(propertyArray, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.Array, PropertyFlags));
         properties.AddDangerous(propertyArrayBuffer, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.ArrayBuffer, PropertyFlags));
-        properties.AddDangerous(propertyAtomics, new LazyPropertyDescriptor<GlobalObject>(this, static _ => Undefined, PropertyFlags));
+        properties.AddDangerous(propertyAtomics, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.Atomics, PropertyFlags));
         properties.AddDangerous(propertyBigInt, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.BigInt, PropertyFlags));
         properties.AddDangerous(propertyBigInt64Array, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.BigInt64Array, PropertyFlags));
         properties.AddDangerous(propertyBigUint64Array, new LazyPropertyDescriptor<GlobalObject>(this, static global => global._realm.Intrinsics.BigUint64Array, PropertyFlags));

Jint/Runtime/Intrinsics.cs

@@ -3,6 +3,7 @@ using Jint.Native.AggregateError;
 using Jint.Native.Array;
 using Jint.Native.ArrayBuffer;
 using Jint.Native.AsyncFunction;
+using Jint.Native.Atomics;
 using Jint.Native.BigInt;
 using Jint.Native.Boolean;
 using Jint.Native.DataView;
@@ -82,6 +83,7 @@ namespace Jint.Runtime
         private SetIteratorPrototype? _setIteratorPrototype;
         private ArrayConstructor? _array;
         private ArrayIteratorPrototype? _arrayIteratorPrototype;
+        private AtomicsInstance? _atomics;
         private BooleanConstructor? _boolean;
         private ArrayBufferConstructor? _arrayBufferConstructor;
         private SharedArrayBufferConstructor? _sharedArrayBufferConstructor;
@@ -133,6 +135,9 @@ namespace Jint.Runtime
         public ArrayConstructor Array =>
             _array ??= new ArrayConstructor(_engine, _realm, Function.PrototypeObject, Object.PrototypeObject);
 
+        internal AtomicsInstance Atomics =>
+            _atomics ??= new AtomicsInstance(_engine, _realm, Object.PrototypeObject);
+
         internal AggregateErrorConstructor AggregateError =>
             _aggregateError ??= new AggregateErrorConstructor(_engine, _realm, Error);