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C++ MutableHandleValue::isMarkable方法代码示例

本文整理汇总了C++中MutableHandleValue::isMarkable方法的典型用法代码示例。如果您正苦于以下问题:C++ MutableHandleValue::isMarkable方法的具体用法?C++ MutableHandleValue::isMarkable怎么用?C++ MutableHandleValue::isMarkable使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在MutableHandleValue的用法示例。


在下文中一共展示了MutableHandleValue::isMarkable方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: obj

bool
JSCompartment::wrap(JSContext *cx, MutableHandleValue vp, HandleObject existingArg)
{
    JS_ASSERT(cx->compartment == this);
    JS_ASSERT_IF(existingArg, existingArg->compartment() == cx->compartment);
    JS_ASSERT_IF(existingArg, vp.isObject());
    JS_ASSERT_IF(existingArg, IsDeadProxyObject(existingArg));

    unsigned flags = 0;

    JS_CHECK_CHROME_RECURSION(cx, return false);

#ifdef DEBUG
    struct AutoDisableProxyCheck {
        JSRuntime *runtime;
        AutoDisableProxyCheck(JSRuntime *rt) : runtime(rt) {
            runtime->gcDisableStrictProxyCheckingCount++;
        }
        ~AutoDisableProxyCheck() { runtime->gcDisableStrictProxyCheckingCount--; }
    } adpc(rt);
#endif

    /* Only GC things have to be wrapped or copied. */
    if (!vp.isMarkable())
        return true;

    if (vp.isString()) {
        RawString str = vp.toString();

        /* If the string is already in this compartment, we are done. */
        if (str->zone() == zone())
            return true;

        /* If the string is an atom, we don't have to copy. */
        if (str->isAtom()) {
            JS_ASSERT(str->zone() == cx->runtime->atomsCompartment->zone());
            return true;
        }
    }

    /*
     * Wrappers should really be parented to the wrapped parent of the wrapped
     * object, but in that case a wrapped global object would have a NULL
     * parent without being a proper global object (JSCLASS_IS_GLOBAL). Instead,
     * we parent all wrappers to the global object in their home compartment.
     * This loses us some transparency, and is generally very cheesy.
     */
    HandleObject global = cx->global();

    /* Unwrap incoming objects. */
    if (vp.isObject()) {
        RootedObject obj(cx, &vp.toObject());

        if (obj->compartment() == this)
            return WrapForSameCompartment(cx, obj, vp);

        /* Translate StopIteration singleton. */
        if (obj->isStopIteration())
            return js_FindClassObject(cx, JSProto_StopIteration, vp);

        /* Unwrap the object, but don't unwrap outer windows. */
        obj = UnwrapObject(obj, /* stopAtOuter = */ true, &flags);

        if (obj->compartment() == this)
            return WrapForSameCompartment(cx, obj, vp);

        if (cx->runtime->preWrapObjectCallback) {
            obj = cx->runtime->preWrapObjectCallback(cx, global, obj, flags);
            if (!obj)
                return false;
        }

        if (obj->compartment() == this)
            return WrapForSameCompartment(cx, obj, vp);
        vp.setObject(*obj);

#ifdef DEBUG
        {
            JSObject *outer = GetOuterObject(cx, obj);
            JS_ASSERT(outer && outer == obj);
        }
#endif
    }

    RootedValue key(cx, vp);

    /* If we already have a wrapper for this value, use it. */
    if (WrapperMap::Ptr p = crossCompartmentWrappers.lookup(key)) {
        vp.set(p->value);
        if (vp.isObject()) {
            RawObject obj = &vp.toObject();
            JS_ASSERT(obj->isCrossCompartmentWrapper());
            JS_ASSERT(obj->getParent() == global);
        }
        return true;
    }

    if (vp.isString()) {
        Rooted<JSLinearString *> str(cx, vp.toString()->ensureLinear(cx));
        if (!str)
//.........这里部分代码省略.........
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