Implement SharedArrayBuffer

src/macros.py

Index: src/macros.py
diff --git a/src/macros.py b/src/macros.py
index 9c166f6a71696d68f50baeb81289a1720605202c..2b950bff573800198a90af8ea47c4d692601ffbc 100644
--- a/src/macros.py
+++ b/src/macros.py
@@ -112,6 +112,7 @@ macro IS_ARGUMENTS(arg)         = (%_ClassOf(arg) === 'Arguments');
 macro IS_GLOBAL(arg)            = (%_ClassOf(arg) === 'global');
 macro IS_ARRAYBUFFER(arg)       = (%_ClassOf(arg) === 'ArrayBuffer');
 macro IS_DATAVIEW(arg)          = (%_ClassOf(arg) === 'DataView');
+macro IS_SHAREDARRAYBUFFER(arg) = (%_ClassOf(arg) === 'SharedArrayBuffer');
 macro IS_GENERATOR(arg)         = (%_ClassOf(arg) === 'Generator');
 macro IS_SET_ITERATOR(arg)      = (%_ClassOf(arg) === 'Set Iterator');
 macro IS_MAP_ITERATOR(arg)      = (%_ClassOf(arg) === 'Map Iterator');
@@ -308,3 +309,7 @@ define NOT_FOUND = -1;
 define DEBUG_IS_ACTIVE = (%_DebugIsActive() != 0);
 macro DEBUG_IS_STEPPING(function) = (%_DebugIsActive() != 0 && %DebugCallbackSupportsStepping(function));
 macro DEBUG_PREPARE_STEP_IN_IF_STEPPING(function) = if (DEBUG_IS_STEPPING(function)) %DebugPrepareStepInIfStepping(function);
+
+# SharedFlag equivalents
+define kNotShared = false;
+define kShared = true;