| // Copyright 2018 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_SCRIPT_MOZJS_45_MOZJS_TYPED_ARRAYS_H_ |
| #define COBALT_SCRIPT_MOZJS_45_MOZJS_TYPED_ARRAYS_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/script/array_buffer.h" |
| #include "cobalt/script/array_buffer_view.h" |
| #include "cobalt/script/exception_message.h" |
| #include "cobalt/script/mozjs-45/mozjs_array_buffer.h" |
| #include "cobalt/script/script_exception.h" |
| #include "cobalt/script/script_value.h" |
| #include "cobalt/script/typed_arrays.h" |
| |
| namespace cobalt { |
| namespace script { |
| namespace mozjs { |
| |
| class MozjsTypedArray final : public TypedArray { |
| public: |
| using BaseType = TypedArray; |
| |
| MozjsTypedArray(JSContext* context, JS::HandleValue value) |
| : context_(context), weak_heap_object_(context, value) { |
| DCHECK(value.isObject()); |
| DCHECK(JS_IsTypedArrayObject(&value.toObject())); |
| } |
| |
| JSObject* handle() const { return weak_heap_object_.GetObject(); } |
| const JS::Value& value() const { return weak_heap_object_.GetValue(); } |
| bool WasCollected() const { return weak_heap_object_.WasCollected(); } |
| |
| Handle<ArrayBuffer> Buffer() const override { |
| JSAutoRequest auto_request(context_); |
| JS::RootedObject array_buffer_view(context_, weak_heap_object_.GetObject()); |
| bool is_shared_memory; |
| JSObject* object = JS_GetArrayBufferViewBuffer(context_, array_buffer_view, |
| &is_shared_memory); |
| JS::RootedValue value(context_); |
| value.setObject(*object); |
| return Handle<ArrayBuffer>( |
| new MozjsUserObjectHolder<MozjsArrayBuffer>(context_, value)); |
| } |
| |
| size_t Length() const override { |
| return JS_GetTypedArrayLength(weak_heap_object_.GetObject()); |
| } |
| size_t ByteOffset() const override { |
| return JS_GetTypedArrayByteOffset(weak_heap_object_.GetObject()); |
| } |
| size_t ByteLength() const override { |
| return JS_GetTypedArrayByteLength(weak_heap_object_.GetObject()); |
| } |
| |
| void* RawData() const override { |
| bool is_shared_memory; |
| JS::AutoCheckCannotGC no_gc; |
| return JS_GetArrayBufferViewData(weak_heap_object_.GetObject(), |
| &is_shared_memory, no_gc); |
| } |
| |
| private: |
| JSContext* context_; |
| WeakHeapObject weak_heap_object_; |
| }; |
| |
| template <> |
| struct TypeTraits<TypedArray> { |
| using ConversionType = MozjsUserObjectHolder<MozjsTypedArray>; |
| using ReturnType = const ScriptValue<TypedArray>*; |
| }; |
| |
| inline void ToJSValue(JSContext* context, |
| const ScriptValue<TypedArray>* typed_array_value, |
| JS::MutableHandleValue out_value) { |
| TRACK_MEMORY_SCOPE("Javascript"); |
| |
| if (!typed_array_value) { |
| out_value.set(JS::NullValue()); |
| return; |
| } |
| |
| const auto* mozjs_typed_array_value = |
| base::polymorphic_downcast<const MozjsUserObjectHolder<MozjsTypedArray>*>( |
| typed_array_value); |
| out_value.setObject(*mozjs_typed_array_value->js_object()); |
| } |
| |
| inline void FromJSValue( |
| JSContext* context, JS::HandleValue value, int conversion_flags, |
| ExceptionState* exception_state, |
| MozjsUserObjectHolder<MozjsTypedArray>* out_typed_array) { |
| TRACK_MEMORY_SCOPE("Javascript"); |
| DCHECK_EQ(0, conversion_flags); |
| DCHECK(out_typed_array); |
| |
| if (!value.isObject()) { |
| exception_state->SetSimpleException(kNotObjectType); |
| return; |
| } |
| |
| if (!JS_IsTypedArrayObject(&value.toObject())) { |
| exception_state->SetSimpleException(kTypeError, |
| "Expected object of type TypedArray"); |
| return; |
| } |
| |
| *out_typed_array = MozjsUserObjectHolder<MozjsTypedArray>(context, value); |
| } |
| |
| template <typename CType, bool IsClamped, typename BaseTypeName, |
| bool (*JS_IsFunction)(JSObject*), |
| void (*js_GetArrayLengthAndDataFunction)(JSObject*, uint32_t*, bool*, |
| CType**), |
| CType* (*JS_GetArrayDataFunction)(JSObject*, bool*, |
| const JS::AutoCheckCannotGC&)> |
| class MozjsTypedArrayImpl final : public BaseTypeName { |
| public: |
| using BaseType = BaseTypeName; |
| |
| MozjsTypedArrayImpl(JSContext* context, JS::HandleValue value) |
| : context_(context), weak_heap_object_(context, value) { |
| DCHECK(value.isObject()); |
| DCHECK(JS_IsFunction(&value.toObject())); |
| } |
| |
| JSObject* handle() const { return weak_heap_object_.GetObject(); } |
| const JS::Value& value() const { return weak_heap_object_.GetValue(); } |
| bool WasCollected() const { return weak_heap_object_.WasCollected(); } |
| |
| Handle<ArrayBuffer> Buffer() const override { |
| JSAutoRequest auto_request(context_); |
| JS::RootedObject array_buffer_view(context_, weak_heap_object_.GetObject()); |
| bool is_shared_memory; |
| JSObject* object = JS_GetArrayBufferViewBuffer(context_, array_buffer_view, |
| &is_shared_memory); |
| JS::RootedValue value(context_); |
| value.setObject(*object); |
| return Handle<ArrayBuffer>( |
| new MozjsUserObjectHolder<MozjsArrayBuffer>(context_, value)); |
| } |
| |
| size_t Length() const override { |
| uint32_t length; |
| bool is_shared_memory; |
| CType* data; |
| js_GetArrayLengthAndDataFunction(weak_heap_object_.GetObject(), &length, |
| &is_shared_memory, &data); |
| return length; |
| } |
| |
| size_t ByteOffset() const override { |
| return JS_GetTypedArrayByteOffset(weak_heap_object_.GetObject()); |
| } |
| |
| size_t ByteLength() const override { |
| return JS_GetTypedArrayByteLength(weak_heap_object_.GetObject()); |
| } |
| |
| CType* Data() const override { |
| bool is_shared_memory; |
| JS::AutoCheckCannotGC no_gc; |
| return JS_GetArrayDataFunction(weak_heap_object_.GetObject(), |
| &is_shared_memory, no_gc); |
| } |
| |
| void* RawData() const override { return static_cast<void*>(Data()); } |
| |
| private: |
| JSContext* context_; |
| WeakHeapObject weak_heap_object_; |
| }; |
| |
| #define COBALT_SCRIPT_USING_MOZJS_ARRAY(array, ctype) \ |
| using Mozjs##array = \ |
| MozjsTypedArrayImpl<ctype, false, array, JS_Is##array, \ |
| js::Get##array##LengthAndData, JS_Get##array##Data>; |
| COBALT_SCRIPT_TYPED_ARRAY_LIST(COBALT_SCRIPT_USING_MOZJS_ARRAY) |
| #undef COBALT_SCRIPT_USING_MOZJS_ARRAY |
| |
| #define COBALT_SCRIPT_CONVERSION_BOILERPLATE(array, ctype) \ |
| template <> \ |
| struct TypeTraits<array> { \ |
| using ConversionType = MozjsUserObjectHolder<Mozjs##array>; \ |
| using ReturnType = const ScriptValue<array>*; \ |
| }; \ |
| \ |
| inline void ToJSValue(JSContext* context, \ |
| const ScriptValue<array>* array_value, \ |
| JS::MutableHandleValue out_value) { \ |
| TRACK_MEMORY_SCOPE("Javascript"); \ |
| if (!array_value) { \ |
| out_value.set(JS::NullValue()); \ |
| return; \ |
| } \ |
| const auto* mozjs_array_value = base::polymorphic_downcast< \ |
| const MozjsUserObjectHolder<Mozjs##array>*>(array_value); \ |
| out_value.setObject(*mozjs_array_value->js_object()); \ |
| } \ |
| \ |
| inline void FromJSValue(JSContext* context, JS::HandleValue value, \ |
| int conversion_flags, \ |
| ExceptionState* exception_state, \ |
| MozjsUserObjectHolder<Mozjs##array>* out_array) { \ |
| TRACK_MEMORY_SCOPE("Javascript"); \ |
| DCHECK_EQ(0, conversion_flags); \ |
| DCHECK(out_array); \ |
| if (!value.isObject()) { \ |
| exception_state->SetSimpleException(kNotObjectType); \ |
| return; \ |
| } \ |
| if (!JS_Is##array(&value.toObject())) { \ |
| exception_state->SetSimpleException(kTypeError, \ |
| "Expected object of type array"); \ |
| return; \ |
| } \ |
| *out_array = MozjsUserObjectHolder<Mozjs##array>(context, value); \ |
| } |
| COBALT_SCRIPT_TYPED_ARRAY_LIST(COBALT_SCRIPT_CONVERSION_BOILERPLATE) |
| #undef COBALT_SCRIPT_CONVERSION_BOILERPLATE |
| |
| } // namespace mozjs |
| } // namespace script |
| } // namespace cobalt |
| |
| #endif // COBALT_SCRIPT_MOZJS_45_MOZJS_TYPED_ARRAYS_H_ |