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39#ifndef QV4ARRAYBUFFER_H
40#define QV4ARRAYBUFFER_H
41
42//
43// W A R N I N G
44// -------------
45//
46// This file is not part of the Qt API. It exists purely as an
47// implementation detail. This header file may change from version to
48// version without notice, or even be removed.
49//
50// We mean it.
51//
52
53#include "qv4object_p.h"
54#include "qv4functionobject_p.h"
55
56QT_BEGIN_NAMESPACE
57
58namespace QV4 {
59
60namespace Heap {
61
62struct SharedArrayBufferCtor : FunctionObject {
63 void init(QV4::ExecutionContext *scope);
64};
65
66struct ArrayBufferCtor : SharedArrayBufferCtor {
67 void init(QV4::ExecutionContext *scope);
68};
69
70struct Q_QML_PRIVATE_EXPORT SharedArrayBuffer : Object {
71 void init(size_t length);
72 void init(const QByteArray& array);
73 void destroy();
74 QTypedArrayData<char> *data;
75 bool isShared;
76
77 uint byteLength() const { return data ? data->size : 0; }
78
79 bool isDetachedBuffer() const { return !data; }
80 bool isSharedArrayBuffer() const { return isShared; }
81};
82
83struct Q_QML_PRIVATE_EXPORT ArrayBuffer : SharedArrayBuffer {
84 void init(size_t length) {
85 SharedArrayBuffer::init(length);
86 isShared = false;
87 }
88 void init(const QByteArray& array) {
89 SharedArrayBuffer::init(array);
90 isShared = false;
91 }
92 void detachArrayBuffer() {
93 if (data && !data->ref.deref())
94 QTypedArrayData<char>::deallocate(data);
95 data = nullptr;
96 }
97};
98
99
100}
101
102struct SharedArrayBufferCtor : FunctionObject
103{
104 V4_OBJECT2(SharedArrayBufferCtor, FunctionObject)
105
106 static ReturnedValue virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *);
107 static ReturnedValue virtualCall(const FunctionObject *f, const Value *thisObject, const Value *argv, int argc);
108};
109
110struct ArrayBufferCtor : SharedArrayBufferCtor
111{
112 V4_OBJECT2(ArrayBufferCtor, SharedArrayBufferCtor)
113
114 static ReturnedValue virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *);
115
116 static ReturnedValue method_isView(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
117};
118
119struct Q_QML_PRIVATE_EXPORT SharedArrayBuffer : Object
120{
121 V4_OBJECT2(SharedArrayBuffer, Object)
122 V4_NEEDS_DESTROY
123 V4_PROTOTYPE(sharedArrayBufferPrototype)
124
125 QByteArray asByteArray() const;
126 uint byteLength() const { return d()->byteLength(); }
127 char *data() { Q_ASSERT(d()->data); return d()->data->data(); }
128 const char *constData() { Q_ASSERT(d()->data); return d()->data->data(); }
129
130 bool isShared() { return d()->data->ref.isShared(); }
131 bool isDetachedBuffer() const { return !d()->data; }
132 bool isSharedArrayBuffer() const { return d()->isShared; }
133};
134
135struct Q_QML_PRIVATE_EXPORT ArrayBuffer : SharedArrayBuffer
136{
137 V4_OBJECT2(ArrayBuffer, SharedArrayBuffer)
138 V4_NEEDS_DESTROY
139 V4_PROTOTYPE(arrayBufferPrototype)
140
141 QByteArray asByteArray() const;
142 uint byteLength() const { return d()->byteLength(); }
143 char *data() { detach(); return d()->data ? d()->data->data() : nullptr; }
144 // ### is that detach needed?
145 const char *constData() { detach(); return d()->data ? d()->data->data() : nullptr; }
146
147 bool isShared() { return d()->data && d()->data->ref.isShared(); }
148 void detach();
149 void detachArrayBuffer() { d()->detachArrayBuffer(); }
150};
151
152struct SharedArrayBufferPrototype : Object
153{
154 void init(ExecutionEngine *engine, Object *ctor);
155
156 static ReturnedValue method_get_byteLength(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
157 static ReturnedValue method_slice(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
158
159 static ReturnedValue slice(const FunctionObject *b, const Value *thisObject, const Value *argv, int argc, bool shared);
160};
161
162struct ArrayBufferPrototype : SharedArrayBufferPrototype
163{
164 void init(ExecutionEngine *engine, Object *ctor);
165
166 static ReturnedValue method_get_byteLength(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
167 static ReturnedValue method_slice(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
168 static ReturnedValue method_toString(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
169};
170
171
172} // namespace QV4
173
174QT_END_NAMESPACE
175
176#endif
177

source code of qtdeclarative/src/qml/jsruntime/qv4arraybuffer_p.h