Orocos Real-Time Toolkit  2.8.3
Public Types | Public Member Functions | List of all members
RTT::base::BufferLocked< T > Class Template Reference

Implements a very simple blocking thread-safe buffer, using mutexes (locks). More...

#include <rtt/base/BufferLocked.hpp>

Inheritance diagram for RTT::base::BufferLocked< T >:
RTT::base::BufferInterface< T > RTT::base::BufferBase

Public Types

typedef BufferInterface< T >::reference_t reference_t
 
typedef BufferInterface< T >::param_t param_t
 
typedef BufferInterface< T >::size_type size_type
 
typedef T value_t
 
typedef boost::shared_ptr< BufferInterface< T > > shared_ptr
 

Public Member Functions

 BufferLocked (size_type size, const T &initial_value=T(), bool circular=false)
 Create a buffer of size size, with preallocated data storage. More...
 
virtual void data_sample (const T &sample)
 Initializes this buffer with a data sample, such that for dynamical allocated types T, the buffer can reserve place to hold these elements. More...
 
virtual T data_sample () const
 Reads back a data sample. More...
 
 ~BufferLocked ()
 Destructor. More...
 
bool Push (param_t item)
 Write a single value to the buffer. More...
 
size_type Push (const std::vector< T > &items)
 Write a sequence of values to the buffer. More...
 
bool Pop (reference_t item)
 Read the oldest value from the buffer. More...
 
size_type Pop (std::vector< T > &items)
 Read the whole buffer. More...
 
value_tPopWithoutRelease ()
 Returns a pointer to the first element in the buffer. More...
 
void Release (value_t *item)
 Releases the pointer. More...
 
size_type capacity () const
 Returns the maximum number of items that can be stored in the buffer. More...
 
size_type size () const
 Returns the actual number of items that are stored in the buffer. More...
 
void clear ()
 Clears all contents of this buffer. More...
 
bool empty () const
 Check if this buffer is empty. More...
 
bool full () const
 Check if this buffer is full. More...
 
size_type dropped () const
 Returns the number of dropped samples, because the buffer was full. More...
 

Detailed Description

template<class T>
class RTT::base::BufferLocked< T >

Implements a very simple blocking thread-safe buffer, using mutexes (locks).

See also
BufferLockFree

Definition at line 61 of file BufferLocked.hpp.

Member Typedef Documentation

template<class T>
typedef BufferInterface<T>::param_t RTT::base::BufferLocked< T >::param_t

Definition at line 67 of file BufferLocked.hpp.

template<class T>
typedef BufferInterface<T>::reference_t RTT::base::BufferLocked< T >::reference_t

Definition at line 66 of file BufferLocked.hpp.

template<class T>
typedef boost::shared_ptr< BufferInterface<T> > RTT::base::BufferInterface< T >::shared_ptr
inherited

Definition at line 62 of file BufferInterface.hpp.

template<class T>
typedef BufferInterface<T>::size_type RTT::base::BufferLocked< T >::size_type

Definition at line 68 of file BufferLocked.hpp.

template<class T>
typedef T RTT::base::BufferLocked< T >::value_t

Definition at line 69 of file BufferLocked.hpp.

Constructor & Destructor Documentation

template<class T>
RTT::base::BufferLocked< T >::BufferLocked ( size_type  size,
const T &  initial_value = T(),
bool  circular = false 
)
inline

Create a buffer of size size, with preallocated data storage.

Parameters
sizeThe number of elements this buffer can hold.
initial_valueA data sample with which each preallocated data element is initialized.
circularSet flag to true to make this buffer circular. If not circular, new values are discarded on full.

Definition at line 77 of file BufferLocked.hpp.

References RTT::base::BufferLocked< T >::data_sample().

template<class T>
RTT::base::BufferLocked< T >::~BufferLocked ( )
inline

Destructor.

Definition at line 98 of file BufferLocked.hpp.

Member Function Documentation

template<class T>
size_type RTT::base::BufferLocked< T >::capacity ( ) const
inlinevirtual

Returns the maximum number of items that can be stored in the buffer.

Returns
maximum number of items.

Implements RTT::base::BufferBase.

Definition at line 196 of file BufferLocked.hpp.

template<class T>
void RTT::base::BufferLocked< T >::clear ( )
inlinevirtual

Clears all contents of this buffer.

Implements RTT::base::BufferBase.

Definition at line 206 of file BufferLocked.hpp.

template<class T>
virtual void RTT::base::BufferLocked< T >::data_sample ( const T &  sample)
inlinevirtual

Initializes this buffer with a data sample, such that for dynamical allocated types T, the buffer can reserve place to hold these elements.

Postcondition
Calling this function causes all data in the buffer to be lost and the size being reset to zero.

Implements RTT::base::BufferInterface< T >.

Definition at line 83 of file BufferLocked.hpp.

template<class T>
virtual T RTT::base::BufferLocked< T >::data_sample ( ) const
inlinevirtual

Reads back a data sample.

Implements RTT::base::BufferInterface< T >.

Definition at line 90 of file BufferLocked.hpp.

Referenced by RTT::base::BufferLocked< T >::BufferLocked().

template<class T>
size_type RTT::base::BufferLocked< T >::dropped ( ) const
inlinevirtual

Returns the number of dropped samples, because the buffer was full.

Implements RTT::base::BufferBase.

Definition at line 221 of file BufferLocked.hpp.

template<class T>
bool RTT::base::BufferLocked< T >::empty ( ) const
inlinevirtual

Check if this buffer is empty.

Returns
true if size() == 0

Implements RTT::base::BufferBase.

Definition at line 211 of file BufferLocked.hpp.

template<class T>
bool RTT::base::BufferLocked< T >::full ( ) const
inlinevirtual

Check if this buffer is full.

Returns
true if size() == capacity()

Implements RTT::base::BufferBase.

Definition at line 216 of file BufferLocked.hpp.

template<class T>
bool RTT::base::BufferLocked< T >::Pop ( reference_t  item)
inlinevirtual

Read the oldest value from the buffer.

Parameters
itemis to be set with a value from the buffer.
Returns
true if something was read.

Implements RTT::base::BufferInterface< T >.

Definition at line 151 of file BufferLocked.hpp.

template<class T>
size_type RTT::base::BufferLocked< T >::Pop ( std::vector< T > &  items)
inlinevirtual

Read the whole buffer.

Parameters
itemsis to be filled with all values in the buffer, with items.begin() the oldest value.
Returns
the number of items read.

Implements RTT::base::BufferInterface< T >.

Definition at line 162 of file BufferLocked.hpp.

template<class T>
value_t* RTT::base::BufferLocked< T >::PopWithoutRelease ( )
inlinevirtual

Returns a pointer to the first element in the buffer.

The pointer is only garanteed to stay valid until the next pop operation.

Note the pointer needs the be released by calling Release on the buffer.

Returns
a pointer to a sample or Zero if buffer is empty

Implements RTT::base::BufferInterface< T >.

Definition at line 175 of file BufferLocked.hpp.

template<class T>
bool RTT::base::BufferLocked< T >::Push ( param_t  item)
inlinevirtual

Write a single value to the buffer.

Parameters
itemthe value to write
Returns
false if the buffer is full.

Implements RTT::base::BufferInterface< T >.

Definition at line 100 of file BufferLocked.hpp.

template<class T>
size_type RTT::base::BufferLocked< T >::Push ( const std::vector< T > &  items)
inlinevirtual

Write a sequence of values to the buffer.

Parameters
itemsthe values to write
Returns
the number of values written (may be less than items.size())

Implements RTT::base::BufferInterface< T >.

Definition at line 117 of file BufferLocked.hpp.

template<class T>
void RTT::base::BufferLocked< T >::Release ( value_t item)
inlinevirtual

Releases the pointer.

Parameters
itempointer aquired using PopWithoutRelease()

Implements RTT::base::BufferInterface< T >.

Definition at line 189 of file BufferLocked.hpp.

template<class T>
size_type RTT::base::BufferLocked< T >::size ( ) const
inlinevirtual

Returns the actual number of items that are stored in the buffer.

Returns
number of items.

Implements RTT::base::BufferBase.

Definition at line 201 of file BufferLocked.hpp.


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