dart::DeltaEncodedTypedDataSerializationCluster Class Reference

Inheritance diagram for dart::DeltaEncodedTypedDataSerializationCluster:

Public Member Functions
	DeltaEncodedTypedDataSerializationCluster ()
	~DeltaEncodedTypedDataSerializationCluster ()
void	Trace (Serializer *s, ObjectPtr object)
void	WriteAlloc (Serializer *s)
void	WriteFill (Serializer *s)
Public Member Functions inherited from dart::SerializationCluster
	SerializationCluster (const char *name, intptr_t cid, intptr_t target_instance_size=kSizeVaries, bool is_canonical=false)
virtual	~SerializationCluster ()
virtual void	Trace (Serializer *serializer, ObjectPtr object)=0
virtual void	WriteAlloc (Serializer *serializer)=0
virtual void	WriteFill (Serializer *serializer)=0
void	WriteAndMeasureAlloc (Serializer *serializer)
void	WriteAndMeasureFill (Serializer *serializer)
const char *	name () const
intptr_t	cid () const
bool	is_canonical () const
bool	is_immutable () const
intptr_t	size () const
intptr_t	num_objects () const
intptr_t	target_memory_size () const
Public Member Functions inherited from dart::ZoneAllocated
	ZoneAllocated ()
void *	operator new (size_t size)
void *	operator new (size_t size, Zone *zone)
void	operator delete (void *pointer)

Additional Inherited Members
Static Public Attributes inherited from dart::SerializationCluster
static constexpr intptr_t	kSizeVaries = -1
Protected Attributes inherited from dart::SerializationCluster
const char *const	name_
const intptr_t	cid_
const intptr_t	target_instance_size_
const bool	is_canonical_
const bool	is_immutable_
intptr_t	size_ = 0
intptr_t	num_objects_ = 0
intptr_t	target_memory_size_ = 0

Detailed Description

Definition at line 5903 of file app_snapshot.cc.

Constructor & Destructor Documentation

DeltaEncodedTypedDataSerializationCluster()

dart::DeltaEncodedTypedDataSerializationCluster::DeltaEncodedTypedDataSerializationCluster ( )

inline

Definition at line 5905 of file app_snapshot.cc.

      : SerializationCluster("DeltaEncodedTypedData",
                             kDeltaEncodedTypedDataCid) {}

~DeltaEncodedTypedDataSerializationCluster()

dart::DeltaEncodedTypedDataSerializationCluster::~DeltaEncodedTypedDataSerializationCluster ( )

inline

Definition at line 5908 of file app_snapshot.cc.

{}

Member Function Documentation

Trace()

void dart::DeltaEncodedTypedDataSerializationCluster::Trace ( Serializer *  s, ObjectPtr  object  )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 5910 of file app_snapshot.cc.

                                              {
    TypedDataPtr data = TypedData::RawCast(object);
    objects_.Add(data);
  }

WriteAlloc()

void dart::DeltaEncodedTypedDataSerializationCluster::WriteAlloc ( Serializer *  s )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 5915 of file app_snapshot.cc.

                                 {
    const intptr_t count = objects_.length();
    s->WriteUnsigned(count);
    for (intptr_t i = 0; i < count; i++) {
      const TypedDataPtr data = objects_[i];
      const intptr_t element_size =
          TypedData::ElementSizeInBytes(data->GetClassId());
      s->AssignRef(data);
      AutoTraceObject(data);
      const intptr_t length_in_bytes =
          Smi::Value(data->untag()->length()) * element_size;
      s->WriteUnsigned(length_in_bytes);
      target_memory_size_ +=
          compiler::target::TypedData::InstanceSize(length_in_bytes);
    }
  }

WriteFill()

void dart::DeltaEncodedTypedDataSerializationCluster::WriteFill ( Serializer *  s )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 5932 of file app_snapshot.cc.

                                {
    const intptr_t count = objects_.length();
    TypedData& typed_data = TypedData::Handle(s->zone());
    for (intptr_t i = 0; i < count; i++) {
      const TypedDataPtr data = objects_[i];
      AutoTraceObject(data);
      const intptr_t cid = data->GetClassId();
      // Only Uint16 and Uint32 typed data is supported at the moment. So encode
      // which this is in the low bit of the length. Uint16 is 0, Uint32 is 1.
      ASSERT(cid == kTypedDataUint16ArrayCid ||
             cid == kTypedDataUint32ArrayCid);
      const intptr_t cid_flag = cid == kTypedDataUint16ArrayCid ? 0 : 1;
      const intptr_t length = Smi::Value(data->untag()->length());
      const intptr_t encoded_length = (length << 1) | cid_flag;
      s->WriteUnsigned(encoded_length);
      intptr_t prev = 0;
      typed_data = data;
      for (intptr_t j = 0; j < length; ++j) {
        const intptr_t value = (cid == kTypedDataUint16ArrayCid)
                                   ? typed_data.GetUint16(j << 1)
                                   : typed_data.GetUint32(j << 2);
        ASSERT(value >= prev);
        s->WriteUnsigned(value - prev);
        prev = value;
      }
    }
  }

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The documentation for this class was generated from the following file:

• third_party/dart-lang/sdk/runtime/vm/app_snapshot.cc