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31 #ifndef SerializedScriptValue_h
32 #define SerializedScriptValue_h
34 #include "bindings/v8/ScriptValue.h"
36 #include "wtf/HashMap.h"
37 #include "wtf/ThreadSafeRefCounted.h"
43 class ArrayBufferContents;
53 typedef Vector<RefPtr<MessagePort>, 1> MessagePortArray;
54 typedef Vector<RefPtr<WTF::ArrayBuffer>, 1> ArrayBufferArray;
55 typedef HashMap<String, RefPtr<BlobDataHandle> > BlobDataHandleMap;
57 class SerializedScriptValue FINAL : public ThreadSafeRefCounted<SerializedScriptValue> {
59 // Increment this for each incompatible change to the wire format.
60 // Version 2: Added StringUCharTag for UChar v8 strings.
61 // Version 3: Switched to using uuids as blob data identifiers.
62 // Version 4: Extended File serialization to be complete.
63 static const uint32_t wireFormatVersion = 4;
65 ~SerializedScriptValue();
67 // If a serialization error occurs (e.g., cyclic input value) this
68 // function returns an empty representation, schedules a V8 exception to
69 // be thrown using v8::ThrowException(), and sets |didThrow|. In this case
70 // the caller must not invoke any V8 operations until control returns to
71 // V8. When serialization is successful, |didThrow| is false.
72 static PassRefPtr<SerializedScriptValue> create(v8::Handle<v8::Value>, MessagePortArray*, ArrayBufferArray*, ExceptionState&, v8::Isolate*);
73 static PassRefPtr<SerializedScriptValue> createFromWire(const String&);
74 static PassRefPtr<SerializedScriptValue> createFromWireBytes(const Vector<uint8_t>&);
75 static PassRefPtr<SerializedScriptValue> create(const String&);
76 static PassRefPtr<SerializedScriptValue> create(const String&, v8::Isolate*);
77 static PassRefPtr<SerializedScriptValue> create();
79 static PassRefPtr<SerializedScriptValue> create(const ScriptValue&, ExceptionState&, ScriptState*);
81 // Never throws exceptions.
82 static PassRefPtr<SerializedScriptValue> createAndSwallowExceptions(v8::Handle<v8::Value>, v8::Isolate*);
84 static PassRefPtr<SerializedScriptValue> nullValue();
85 static PassRefPtr<SerializedScriptValue> nullValue(v8::Isolate*);
87 String toWireString() const { return m_data; }
88 void toWireBytes(Vector<char>&) const;
90 // Deserializes the value (in the current context). Returns a null value in
92 v8::Handle<v8::Value> deserialize(MessagePortArray* = 0);
93 v8::Handle<v8::Value> deserialize(v8::Isolate*, MessagePortArray* = 0);
95 // Only reflects the truth if the SSV was created by walking a v8 value, not reliable
96 // if the SSV was created createdFromWire(data).
97 bool containsBlobs() const { return !m_blobDataHandles.isEmpty(); }
99 // Informs the V8 about external memory allocated and owned by this object. Large values should contribute
100 // to GC counters to eventually trigger a GC, otherwise flood of postMessage() can cause OOM.
101 // Ok to invoke multiple times (only adds memory once).
102 // The memory registration is revoked automatically in destructor.
103 void registerMemoryAllocatedWithCurrentScriptContext();
106 enum StringDataMode {
110 typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray;
112 SerializedScriptValue();
113 SerializedScriptValue(v8::Handle<v8::Value>, MessagePortArray*, ArrayBufferArray*, ExceptionState&, v8::Isolate*);
114 explicit SerializedScriptValue(const String& wireData);
116 static PassOwnPtr<ArrayBufferContentsArray> transferArrayBuffers(ArrayBufferArray&, ExceptionState&, v8::Isolate*);
119 OwnPtr<ArrayBufferContentsArray> m_arrayBufferContentsArray;
120 BlobDataHandleMap m_blobDataHandles;
121 intptr_t m_externallyAllocatedMemory;
124 } // namespace WebCore
126 #endif // SerializedScriptValue_h