A Buffer is an object which is used to store (Push) and retrieve (Pop) values from. More...
#include <rtt/base/BufferInterface.hpp>
Public Types | |
| typedef T | value_t |
| typedef BufferBase::size_type | size_type |
|
typedef boost::shared_ptr < BufferInterface< T > > | shared_ptr |
|
typedef boost::call_traits< T > ::param_type | param_t |
|
typedef boost::call_traits< T > ::reference | reference_t |
Public Member Functions | |
| virtual bool | Pop (reference_t item)=0 |
| Read the oldest value from the buffer. | |
| virtual size_type | Pop (std::vector< value_t > &items)=0 |
| Read the whole buffer. | |
| virtual value_t * | PopWithoutRelease ()=0 |
| Returns a pointer to the first element in the buffer. | |
| virtual void | Release (value_t *item)=0 |
| Releases the pointer. | |
| virtual bool | Push (param_t item)=0 |
| Write a single value to the buffer. | |
| virtual size_type | Push (const std::vector< value_t > &items)=0 |
| Write a sequence of values to the buffer. | |
| virtual void | data_sample (const T &sample)=0 |
| Initializes this buffer with a data sample, such that for dynamical allocated types T, the buffer can reserve place to hold these elements. | |
| virtual T | data_sample () const =0 |
| Reads back a data sample. | |
| virtual size_type | capacity () const =0 |
| Returns the maximum number of items that can be stored in the buffer. | |
| virtual size_type | size () const =0 |
| Returns the actual number of items that are stored in the buffer. | |
| virtual bool | empty () const =0 |
| Check if this buffer is empty. | |
| virtual bool | full () const =0 |
| Check if this buffer is full. | |
| virtual void | clear ()=0 |
| Clears all contents of this buffer. | |
Detailed Description
template<class T>
class RTT::base::BufferInterface< T >
A Buffer is an object which is used to store (Push) and retrieve (Pop) values from.
- Parameters:
-
T The value type stored in this buffer.
Definition at line 55 of file BufferInterface.hpp.
Member Function Documentation
| virtual size_type RTT::base::BufferBase::capacity | ( | ) | const [pure virtual, inherited] |
Returns the maximum number of items that can be stored in the buffer.
- Returns:
- maximum number of items.
Implemented in RTT::base::BufferLocked< T >, RTT::base::BufferUnSync< T >, and RTT::base::BufferLockFree< T >.
| virtual void RTT::base::BufferBase::clear | ( | ) | [pure virtual, inherited] |
Clears all contents of this buffer.
Implemented in RTT::base::BufferLocked< T >, RTT::base::BufferUnSync< T >, and RTT::base::BufferLockFree< T >.
Referenced by RTT::internal::ChannelBufferElement< T >::clear().
| virtual void RTT::base::BufferInterface< T >::data_sample | ( | const T & | sample | ) | [pure virtual] |
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.
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
Referenced by RTT::internal::ChannelBufferElement< T >::data_sample().
| virtual bool RTT::base::BufferBase::empty | ( | ) | const [pure virtual, inherited] |
Check if this buffer is empty.
- Returns:
- true if size() == 0
Implemented in RTT::base::BufferLocked< T >, RTT::base::BufferUnSync< T >, and RTT::base::BufferLockFree< T >.
| virtual bool RTT::base::BufferBase::full | ( | ) | const [pure virtual, inherited] |
Check if this buffer is full.
- Returns:
- true if size() == capacity()
Implemented in RTT::base::BufferLocked< T >, RTT::base::BufferUnSync< T >, and RTT::base::BufferLockFree< T >.
| virtual bool RTT::base::BufferInterface< T >::Pop | ( | reference_t | item | ) | [pure virtual] |
Read the oldest value from the buffer.
- Parameters:
-
item is to be set with a value from the buffer.
- Returns:
- true if something was read.
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
| virtual size_type RTT::base::BufferInterface< T >::Pop | ( | std::vector< value_t > & | items | ) | [pure virtual] |
Read the whole buffer.
- Parameters:
-
items is to be filled with all values in the buffer, with items.begin() the oldest value.
- Returns:
- the number of items read.
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
| virtual value_t* RTT::base::BufferInterface< T >::PopWithoutRelease | ( | ) | [pure virtual] |
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
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
Referenced by RTT::internal::ChannelBufferElement< T >::read().
| virtual bool RTT::base::BufferInterface< T >::Push | ( | param_t | item | ) | [pure virtual] |
Write a single value to the buffer.
- Parameters:
-
item the value to write
- Returns:
- false if the buffer is full.
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
Referenced by RTT::internal::ChannelBufferElement< T >::write().
| virtual size_type RTT::base::BufferInterface< T >::Push | ( | const std::vector< value_t > & | items | ) | [pure virtual] |
Write a sequence of values to the buffer.
- Parameters:
-
items the values to write
- Returns:
- the number of values written (may be less than items.size())
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
| virtual void RTT::base::BufferInterface< T >::Release | ( | value_t * | item | ) | [pure virtual] |
Releases the pointer.
- Parameters:
-
item pointer aquired using PopWithoutRelease()
Implemented in RTT::base::BufferLockFree< T >, RTT::base::BufferLocked< T >, and RTT::base::BufferUnSync< T >.
Referenced by RTT::internal::ChannelBufferElement< T >::clear(), and RTT::internal::ChannelBufferElement< T >::read().
| virtual size_type RTT::base::BufferBase::size | ( | ) | const [pure virtual, inherited] |
Returns the actual number of items that are stored in the buffer.
- Returns:
- number of items.
Implemented in RTT::base::BufferLocked< T >, RTT::base::BufferUnSync< T >, and RTT::base::BufferLockFree< T >.
The documentation for this class was generated from the following file:
- rtt/base/BufferInterface.hpp
