add lib.esnext.sharedmemory

Jake Bailey (jakebailey) · Jun 6, 2025 · May 2, 2025 · May 2, 2025 · Jun 6, 2025 · May 3, 2025
commit 6cdc9e035399144259a5d702d0c50b69b6f7a519
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
@@ -249,6 +249,7 @@ const libEntries: [string, string][] = [
     ["esnext.iterator", "lib.esnext.iterator.d.ts"],
     ["esnext.promise", "lib.esnext.promise.d.ts"],
     ["esnext.float16", "lib.esnext.float16.d.ts"],
+    ["esnext.sharedmemory", "lib.esnext.sharedmemory.d.ts"],
     ["decorators", "lib.decorators.d.ts"],
     ["decorators.legacy", "lib.decorators.legacy.d.ts"],
 ];

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
@@ -1450,6 +1450,9 @@ export const getScriptTargetFeatures: () => ScriptTargetFeatures = /* @__PURE__
             es2024: [
                 "waitAsync",
             ],
+            esnext: [
+                "pause",
+            ],
         })),
         SharedArrayBuffer: new Map(Object.entries({
             es2017: [

diff --git a/src/lib/esnext.d.ts b/src/lib/esnext.d.ts
@@ -7,3 +7,4 @@
 /// <reference lib="esnext.iterator" />
 /// <reference lib="esnext.promise" />
 /// <reference lib="esnext.float16" />
+/// <reference lib="esnext.sharedmemory" />
diff --git a/src/lib/esnext.sharedmemory.d.ts b/src/lib/esnext.sharedmemory.d.ts
@@ -0,0 +1,7 @@
+interface Atomics {
+    /**
+     * Performs a finite-time microwait by signaling to the operating system or
+     * CPU that the current executing code is in a spin-wait loop.
+     */
+    pause(n?: number): void;
+}
diff --git a/src/lib/libs.json b/src/lib/libs.json
@@ -87,6 +87,7 @@
         "esnext.iterator",
         "esnext.promise",
         "esnext.float16",
+        "esnext.sharedmemory",
         "decorators",
         "decorators.legacy",
         // Default libraries

diff --git a/tests/cases/conformance/esnext/esnextSharedMemory.ts b/tests/cases/conformance/esnext/esnextSharedMemory.ts
@@ -0,0 +1,4 @@
+// @lib: esnext
+
+Atomics.pause();
+Atomics.pause(1);