Source/WebCore/bindings/js/JSWorkerGlobalScopeCustom.cpp

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#include "config.h"
#include "JSWorkerGlobalScope.h"

#include "JSDOMExceptionHandling.h"
#include "WorkerGlobalScope.h"
#include <JavaScriptCore/JSMicrotask.h>

namespace WebCore {
using namespace JSC;

void JSWorkerGlobalScope::visitAdditionalChildren(SlotVisitor& visitor)
{
    if (auto* location = wrapped().optionalLocation())
        visitor.addOpaqueRoot(location);
    if (auto* navigator = wrapped().optionalNavigator())
        visitor.addOpaqueRoot(navigator);
    ScriptExecutionContext& context = wrapped();
    visitor.addOpaqueRoot(&context);
    
    // Normally JSEventTargetCustom.cpp's JSEventTarget::visitAdditionalChildren() would call this. But
    // even though WorkerGlobalScope is an EventTarget, JSWorkerGlobalScope does not subclass
    // JSEventTarget, so we need to do this here.
    wrapped().visitJSEventListeners(visitor);
}

JSValue JSWorkerGlobalScope::queueMicrotask(JSGlobalObject& lexicalGlobalObject, CallFrame& callFrame)
{
    VM& vm = lexicalGlobalObject.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    if (UNLIKELY(callFrame.argumentCount() < 1))
        return throwException(&lexicalGlobalObject, scope, createNotEnoughArgumentsError(&lexicalGlobalObject));

    JSValue functionValue = callFrame.uncheckedArgument(0);
    if (UNLIKELY(!functionValue.isFunction(vm)))
        return JSValue::decode(throwArgumentMustBeFunctionError(lexicalGlobalObject, scope, 0, "callback", "WorkerGlobalScope", "queueMicrotask"));

    scope.release();
    Base::queueMicrotask(JSC::createJSMicrotask(vm, functionValue));
    return jsUndefined();
}

} // namespace WebCore