1// Copyright 2013 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "tonic/typed_data/typed_list.h"
6
7#include <cstring>
8
9#include "tonic/logging/dart_error.h"
10
11namespace tonic {
12
13template <Dart_TypedData_Type kTypeName, typename ElemType>
14TypedList<kTypeName, ElemType>::TypedList()
15 : data_(nullptr), num_elements_(0), dart_handle_(nullptr) {}
16
17template <Dart_TypedData_Type kTypeName, typename ElemType>
18TypedList<kTypeName, ElemType>::TypedList(Dart_Handle list)
19 : data_(nullptr), num_elements_(0), dart_handle_(list) {
20 if (Dart_IsNull(list))
21 return;
22
23 Dart_TypedData_Type type;
24 Dart_TypedDataAcquireData(list, &type, reinterpret_cast<void**>(&data_),
25 &num_elements_);
26 TONIC_DCHECK(!LogIfError(list));
27 if (type != kTypeName)
28 Dart_ThrowException(ToDart("Non-genuine TypedData passed to engine."));
29}
30
31template <Dart_TypedData_Type kTypeName, typename ElemType>
32TypedList<kTypeName, ElemType>::TypedList(
33 TypedList<kTypeName, ElemType>&& other)
34 : data_(other.data_),
35 num_elements_(other.num_elements_),
36 dart_handle_(other.dart_handle_) {
37 other.data_ = nullptr;
38 other.num_elements_ = 0;
39 other.dart_handle_ = nullptr;
40}
41
42template <Dart_TypedData_Type kTypeName, typename ElemType>
43TypedList<kTypeName, ElemType>::~TypedList() {
44 Release();
45}
46
47template <Dart_TypedData_Type kTypeName, typename ElemType>
48void TypedList<kTypeName, ElemType>::Release() {
49 if (data_) {
50 Dart_TypedDataReleaseData(dart_handle_);
51 data_ = nullptr;
52 num_elements_ = 0;
53 dart_handle_ = nullptr;
54 }
55}
56
57template <Dart_TypedData_Type kTypeName, typename ElemType>
58TypedList<kTypeName, ElemType>
59DartConverter<TypedList<kTypeName, ElemType>>::FromArguments(
60 Dart_NativeArguments args,
61 int index,
62 Dart_Handle& exception) {
63 Dart_Handle list = Dart_GetNativeArgument(args, index);
64 TONIC_DCHECK(!LogIfError(list));
65 return TypedList<kTypeName, ElemType>(list);
66}
67
68template <Dart_TypedData_Type kTypeName, typename ElemType>
69void DartConverter<TypedList<kTypeName, ElemType>>::SetReturnValue(
70 Dart_NativeArguments args,
71 TypedList<kTypeName, ElemType> val) {
72 Dart_Handle result = val.dart_handle();
73 val.Release(); // Must release acquired typed data before calling Dart API.
74 Dart_SetReturnValue(args, result);
75}
76
77template <Dart_TypedData_Type kTypeName, typename ElemType>
78Dart_Handle DartConverter<TypedList<kTypeName, ElemType>>::ToDart(
79 const ElemType* buffer,
80 unsigned int length) {
81 const intptr_t buffer_length = static_cast<intptr_t>(length);
82 Dart_Handle array = Dart_NewTypedData(kTypeName, buffer_length);
83 TONIC_DCHECK(!LogIfError(array));
84 {
85 Dart_TypedData_Type type;
86 void* data = nullptr;
87 intptr_t data_length = 0;
88 Dart_TypedDataAcquireData(array, &type, &data, &data_length);
89 TONIC_CHECK(type == kTypeName);
90 TONIC_CHECK(data);
91 TONIC_CHECK(data_length == buffer_length);
92 std::memmove(data, buffer, data_length * sizeof(ElemType));
93 Dart_TypedDataReleaseData(array);
94 }
95 return array;
96}
97
98#define TONIC_TYPED_DATA_DEFINE(name, type) \
99 template class TypedList<Dart_TypedData_k##name, type>; \
100 template struct DartConverter<name##List>;
101
102TONIC_TYPED_DATA_FOREACH(TONIC_TYPED_DATA_DEFINE)
103
104#undef TONIC_TYPED_DATA_DEFINE
105
106} // namespace tonic
107