JSCallbackFunction.cpp [plain text]
#include "config.h"
#include "JSCallbackFunction.h"
#include "APIShims.h"
#include "APICast.h"
#include "CodeBlock.h"
#include "Error.h"
#include "ExceptionHelpers.h"
#include "FunctionPrototype.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSLock.h"
#include "Operations.h"
#include <wtf/Vector.h>
namespace JSC {
ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSCallbackFunction);
const ClassInfo JSCallbackFunction::s_info = { "CallbackFunction", &InternalFunction::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackFunction) };
JSCallbackFunction::JSCallbackFunction(JSGlobalObject* globalObject, Structure* structure, JSObjectCallAsFunctionCallback callback)
: InternalFunction(globalObject, structure)
, m_callback(callback)
{
}
void JSCallbackFunction::finishCreation(VM& vm, const String& name)
{
Base::finishCreation(vm, name);
ASSERT(inherits(&s_info));
}
JSCallbackFunction* JSCallbackFunction::create(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const String& name)
{
JSCallbackFunction* function = new (NotNull, allocateCell<JSCallbackFunction>(*exec->heap())) JSCallbackFunction(globalObject, globalObject->callbackFunctionStructure(), callback);
function->finishCreation(exec->vm(), name);
return function;
}
EncodedJSValue JSCallbackFunction::call(ExecState* exec)
{
JSContextRef execRef = toRef(exec);
JSObjectRef functionRef = toRef(exec->callee());
JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));
size_t argumentCount = exec->argumentCount();
Vector<JSValueRef, 16> arguments;
arguments.reserveInitialCapacity(argumentCount);
for (size_t i = 0; i < argumentCount; ++i)
arguments.uncheckedAppend(toRef(exec, exec->argument(i)));
JSValueRef exception = 0;
JSValueRef result;
{
APICallbackShim callbackShim(exec);
result = jsCast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
}
if (exception)
throwError(exec, toJS(exec, exception));
if (!result)
return JSValue::encode(jsUndefined());
return JSValue::encode(toJS(exec, result));
}
CallType JSCallbackFunction::getCallData(JSCell*, CallData& callData)
{
callData.native.function = call;
return CallTypeHost;
}
}