hpcl_rtt::DataObjectLockFree< T > Class Template Reference

#include <data_lockfree.hpp>

List of all members.

Classes
struct	DataBuf
Public Types
typedef T	DataType
typedef boost::shared_ptr < DataObjectLockFree< T > >	shared_ptr
Public Member Functions
virtual void	data_sample (const DataType &sample)
	DataObjectLockFree (const T &initial_value=T(), unsigned int max_threads=2)
virtual DataType	Get () const
virtual void	Get (DataType &pull) const
virtual void	Set (const DataType &push)
	~DataObjectLockFree ()
Public Attributes
const unsigned int	MAX_THREADS
	The maximum number of threads.
Private Types
typedef DataBuf *	PtrType
typedef DataBuf	ValueType
typedef DataBuf *volatile	VolPtrType
Private Attributes
const unsigned int	BUF_LEN
DataBuf *	data
VolPtrType	read_ptr
VolPtrType	write_ptr

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Detailed Description

template<class T>
class hpcl_rtt::DataObjectLockFree< T >

Definition at line 9 of file data_lockfree.hpp.

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Member Typedef Documentation

template<class T>

typedef T hpcl_rtt::DataObjectLockFree< T >::DataType

The type of the data.

Definition at line 15 of file data_lockfree.hpp.

template<class T>

typedef DataBuf* hpcl_rtt::DataObjectLockFree< T >::PtrType [private]

Definition at line 48 of file data_lockfree.hpp.

template<class T>

typedef boost::shared_ptr<DataObjectLockFree<T> > hpcl_rtt::DataObjectLockFree< T >::shared_ptr

Definition at line 16 of file data_lockfree.hpp.

template<class T>

typedef DataBuf hpcl_rtt::DataObjectLockFree< T >::ValueType [private]

Definition at line 47 of file data_lockfree.hpp.

template<class T>

typedef DataBuf* volatile hpcl_rtt::DataObjectLockFree< T >::VolPtrType [private]

Definition at line 46 of file data_lockfree.hpp.

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Constructor & Destructor Documentation

template<class T>

hpcl_rtt::DataObjectLockFree< T >::DataObjectLockFree	(	const T &	initial_value = T(),
		unsigned int	max_threads = 2
	)		[inline]

Construct a DataObjectLockFree by name.

Parameters:

_name	The name of this DataObject.
initial_value	The initial value of this DataObject.

Definition at line 65 of file data_lockfree.hpp.

template<class T>

hpcl_rtt::DataObjectLockFree< T >::~DataObjectLockFree

(

)

[inline]

Definition at line 76 of file data_lockfree.hpp.

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Member Function Documentation

template<class T>

virtual void hpcl_rtt::DataObjectLockFree< T >::data_sample

(

const DataType &

sample

)

[inline, virtual]

Definition at line 151 of file data_lockfree.hpp.

template<class T>

virtual DataType hpcl_rtt::DataObjectLockFree< T >::Get

(

)

const [inline, virtual]

Get a copy of the data. This method will allocate memory twice if data is not a value type. Use Get(DataType&) for the non-allocating version.

Returns:

A copy of the data.

Definition at line 88 of file data_lockfree.hpp.

template<class T>

virtual void hpcl_rtt::DataObjectLockFree< T >::Get

(

DataType &

pull

)

const [inline, virtual]

Get a copy of the Data (non allocating). If pull has reserved enough memory to store the copy, no memory will be allocated.

Parameters:

pull	A copy of the data.

Definition at line 97 of file data_lockfree.hpp.

template<class T>

virtual void hpcl_rtt::DataObjectLockFree< T >::Set

(

const DataType &

push

)

[inline, virtual]

Set the data to a certain value (non blocking).

Parameters:

push	The data which must be set.

This method can not be called concurrently (only one producer). With a minimum of 3 buffers, if the write_ptr+1 field is not occupied, it will remain so because the read_ptr is at write_ptr-1 (and can not increment the counter on write_ptr+1). Hence, no locking is needed.

Definition at line 124 of file data_lockfree.hpp.

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Member Data Documentation

template<class T>

const unsigned int hpcl_rtt::DataObjectLockFree< T >::BUF_LEN [private]

Conversion of number of threads to size of buffer.

Definition at line 28 of file data_lockfree.hpp.

template<class T>

DataBuf* hpcl_rtt::DataObjectLockFree< T >::data [private]

A 3 element Data buffer

Definition at line 56 of file data_lockfree.hpp.

template<class T>

const unsigned int hpcl_rtt::DataObjectLockFree< T >::MAX_THREADS

The maximum number of threads.

When used in data flow, this is always 2.

Definition at line 23 of file data_lockfree.hpp.

template<class T>

VolPtrType hpcl_rtt::DataObjectLockFree< T >::read_ptr [private]

Definition at line 50 of file data_lockfree.hpp.

template<class T>

VolPtrType hpcl_rtt::DataObjectLockFree< T >::write_ptr [private]

Definition at line 51 of file data_lockfree.hpp.

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

• data_lockfree.hpp