X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/4be4e30906bcb8ee30b4d189205cb70bad6707ce..81345200c95645a1b0d2635520f96ad55dfde63f:/runtime/JSPromiseFunctions.cpp?ds=inline

diff --git a/runtime/JSPromiseFunctions.cpp b/runtime/JSPromiseFunctions.cpp
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+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "JSPromiseFunctions.h"
+
+#if ENABLE(PROMISES)
+
+#include "Error.h"
+#include "JSCJSValueInlines.h"
+#include "JSCellInlines.h"
+#include "JSPromise.h"
+#include "JSPromiseConstructor.h"
+#include "JSPromiseDeferred.h"
+#include "NumberObject.h"
+#include "StructureInlines.h"
+
+namespace JSC {
+
+// Deferred Construction Functions
+static EncodedJSValue JSC_HOST_CALL deferredConstructionFunction(ExecState* exec)
+{
+    JSObject* F = exec->callee();
+
+    VM& vm = exec->vm();
+
+    // 1. Set F's [[Resolve]] internal slot to resolve.
+    F->putDirect(vm, vm.propertyNames->resolvePrivateName, exec->argument(0));
+
+    // 2. Set F's [[Reject]] internal slot to reject.
+    F->putDirect(vm, vm.propertyNames->rejectPrivateName, exec->argument(1));
+
+    // 3. Return.
+    return JSValue::encode(jsUndefined());
+}
+
+JSFunction* createDeferredConstructionFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 2, ASCIILiteral("DeferredConstructionFunction"), deferredConstructionFunction);
+}
+
+// Identity Functions
+
+static EncodedJSValue JSC_HOST_CALL identifyFunction(ExecState* exec)
+{
+    return JSValue::encode(exec->argument(0));
+}
+
+JSFunction* createIdentifyFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("IdentityFunction"), identifyFunction);
+}
+
+// Promise.All Countdown Functions
+
+static EncodedJSValue JSC_HOST_CALL promiseAllCountdownFunction(ExecState* exec)
+{
+    JSValue x = exec->argument(0);
+    VM& vm = exec->vm();
+    JSObject* F = exec->callee();
+
+    // 1. Let 'index' be the value of F's [[Index]] internal slot.
+    uint32_t index = F->get(exec, vm.propertyNames->indexPrivateName).asUInt32();
+
+    // 2. Let 'values' be the value of F's [[Values]] internal slot..
+    JSArray* values = jsCast<JSArray*>(F->get(exec, vm.propertyNames->valuesPrivateName));
+
+    // 3. Let 'deferred' be the value of F's [[Deferred]] internal slot.
+    JSPromiseDeferred* deferred = jsCast<JSPromiseDeferred*>(F->get(exec, vm.propertyNames->deferredPrivateName));
+
+    // 4. Let 'countdownHolder' be the value of F's [[CountdownHolder]] internal slot.
+    NumberObject* countdownHolder = jsCast<NumberObject*>(F->get(exec, vm.propertyNames->countdownHolderPrivateName));
+
+    // 5. Let 'result' be the result of calling the [[DefineOwnProperty]] internal method
+    //    of 'values' with arguments 'index' and Property Descriptor { [[Value]]: x,
+    //    [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true }.
+    values->putDirectIndex(exec, index, x);
+
+    // 6. RejectIfAbrupt(result, deferred).
+    if (exec->hadException())
+        abruptRejection(exec, deferred);
+
+    // 7. Set countdownHolder.[[Countdown]] to countdownHolder.[[Countdown]] - 1.
+    uint32_t newCountdownValue = countdownHolder->internalValue().asUInt32() - 1;
+    countdownHolder->setInternalValue(vm, JSValue(newCountdownValue));
+
+    // 8. If countdownHolder.[[Countdown]] is 0,
+    if (!newCountdownValue) {
+        // i. Return the result of calling the [[Call]] internal method of deferred.[[Resolve]]
+        //    with undefined as thisArgument and a List containing 'values' as argumentsList.
+        performDeferredResolve(exec, deferred, values);
+    }
+
+    // 9. Return.
+    return JSValue::encode(jsUndefined());
+}
+
+JSFunction* createPromiseAllCountdownFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("PromiseAllCountdownFunction"), promiseAllCountdownFunction);
+}
+
+// Promise Resolution Handler Functions
+
+static EncodedJSValue JSC_HOST_CALL promiseResolutionHandlerFunction(ExecState* exec)
+{
+    JSValue x = exec->argument(0);
+    VM& vm = exec->vm();
+    JSObject* F = exec->callee();
+
+    // 1. Let 'promise' be the value of F's [[Promise]] internal slot
+    JSPromise* promise = jsCast<JSPromise*>(F->get(exec, vm.propertyNames->promisePrivateName));
+
+    // 2. Let 'fulfillmentHandler' be the value of F's [[FulfillmentHandler]] internal slot.
+    JSValue fulfillmentHandler = F->get(exec, vm.propertyNames->fulfillmentHandlerPrivateName);
+    
+    // 3. Let 'rejectionHandler' be the value of F's [[RejectionHandler]] internal slot.
+    JSValue rejectionHandler = F->get(exec, vm.propertyNames->rejectionHandlerPrivateName);
+    
+    // 4. If SameValue(x, promise) is true,
+    if (sameValue(exec, x, promise)) {
+        // i. Let 'selfResolutionError' be a newly-created TypeError object.
+        JSObject* selfResolutionError = createTypeError(exec, ASCIILiteral("Resolve a promise with itself"));
+        // ii. Return the result of calling the [[Call]] internal method of rejectionHandler with
+        //     undefined as thisArgument and a List containing selfResolutionError as argumentsList.
+        CallData rejectCallData;
+        CallType rejectCallType = getCallData(rejectionHandler, rejectCallData);
+        ASSERT(rejectCallType != CallTypeNone);
+
+        MarkedArgumentBuffer rejectArguments;
+        rejectArguments.append(selfResolutionError);
+
+        return JSValue::encode(call(exec, rejectionHandler, rejectCallType, rejectCallData, jsUndefined(), rejectArguments));
+    }
+
+    // 5. Let 'C' be the value of promise's [[PromiseConstructor]] internal slot.
+    JSValue C = promise->constructor();
+
+    // 6. Let 'deferred' be the result of calling GetDeferred(C)
+    JSValue deferredValue = createJSPromiseDeferredFromConstructor(exec, C);
+
+    // 7. ReturnIfAbrupt(deferred).
+    if (exec->hadException())
+        return JSValue::encode(jsUndefined());
+
+    JSPromiseDeferred* deferred = jsCast<JSPromiseDeferred*>(deferredValue);
+
+    // 8. Let 'updateResult' be the result of calling UpdateDeferredFromPotentialThenable(x, deferred).
+    ThenableStatus updateResult = updateDeferredFromPotentialThenable(exec, x, deferred);
+
+    // 9. ReturnIfAbrupt(updateResult).
+    if (exec->hadException())
+        return JSValue::encode(jsUndefined());
+
+    // 10. If 'updateResult' is not "not a thenable", return the result of calling
+    //     Invoke(deferred.[[Promise]], "then", (fulfillmentHandler, rejectionHandler)).
+    // NOTE: Invoke does not seem to be defined anywhere, so I am guessing here.
+    if (updateResult != NotAThenable) {
+        JSObject* deferredPromise = deferred->promise();
+    
+        JSValue thenValue = deferredPromise->get(exec, exec->vm().propertyNames->then);
+        if (exec->hadException())
+            return JSValue::encode(jsUndefined());
+
+        CallData thenCallData;
+        CallType thenCallType = getCallData(thenValue, thenCallData);
+        if (thenCallType == CallTypeNone)
+            return JSValue::encode(throwTypeError(exec));
+
+        MarkedArgumentBuffer arguments;
+        arguments.append(fulfillmentHandler);
+        arguments.append(rejectionHandler);
+
+        return JSValue::encode(call(exec, thenValue, thenCallType, thenCallData, deferredPromise, arguments));
+    }
+    
+    // 11. Return the result of calling the [[Call]] internal method of fulfillmentHandler
+    //     with undefined as thisArgument and a List containing x as argumentsList.
+    CallData fulfillmentHandlerCallData;
+    CallType fulfillmentHandlerCallType = getCallData(fulfillmentHandler, fulfillmentHandlerCallData);
+    ASSERT(fulfillmentHandlerCallType != CallTypeNone);
+    
+    MarkedArgumentBuffer fulfillmentHandlerArguments;
+    fulfillmentHandlerArguments.append(x);
+
+    return JSValue::encode(call(exec, fulfillmentHandler, fulfillmentHandlerCallType, fulfillmentHandlerCallData, jsUndefined(), fulfillmentHandlerArguments));
+}
+
+JSFunction* createPromiseResolutionHandlerFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("PromiseResolutionHandlerFunction"), promiseResolutionHandlerFunction);
+}
+
+// Reject Promise Functions
+
+static EncodedJSValue JSC_HOST_CALL rejectPromiseFunction(ExecState* exec)
+{
+    JSValue reason = exec->argument(0);
+    JSObject* F = exec->callee();
+    VM& vm = exec->vm();
+
+    // 1. Let 'promise' be the value of F's [[Promise]] internal slot.
+    JSPromise* promise = jsCast<JSPromise*>(F->get(exec, exec->vm().propertyNames->promisePrivateName));
+
+    // 2. Return the result of calling PromiseReject(promise, reason);
+    promise->reject(vm, reason);
+
+    return JSValue::encode(jsUndefined());
+}
+
+JSFunction* createRejectPromiseFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("RejectPromiseFunction"), rejectPromiseFunction);
+}
+
+// Resolve Promise Functions
+
+static EncodedJSValue JSC_HOST_CALL resolvePromiseFunction(ExecState* exec)
+{
+    JSValue resolution = exec->argument(0);
+    JSObject* F = exec->callee();
+    VM& vm = exec->vm();
+
+    // 1. Let 'promise' be the value of F's [[Promise]] internal slot.
+    JSPromise* promise = jsCast<JSPromise*>(F->get(exec, vm.propertyNames->promisePrivateName));
+
+    // 2. Return the result of calling PromiseResolve(promise, resolution);
+    promise->resolve(vm, resolution);
+
+    return JSValue::encode(jsUndefined());
+}
+
+JSFunction* createResolvePromiseFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("ResolvePromiseFunction"), resolvePromiseFunction);
+}
+
+// Thrower Functions
+
+static EncodedJSValue JSC_HOST_CALL throwerFunction(ExecState* exec)
+{
+    return JSValue::encode(exec->vm().throwException(exec, exec->argument(0)));
+}
+
+JSFunction* createThrowerFunction(VM& vm, JSGlobalObject* globalObject)
+{
+    return JSFunction::create(vm, globalObject, 1, ASCIILiteral("ThrowerFunction"), throwerFunction);
+}
+
+
+} // namespace JSC
+
+#endif // ENABLE(PROMISES)