eq::base::LFQueue< T > Class Template Reference

A thread-safe, lock-free queue with non-blocking access. More...

#include <lfQueue.h>

Inheritance diagram for eq::base::LFQueue< T >:

Collaboration diagram for eq::base::LFQueue< T >:

List of all members.

Public Member Functions
	LFQueue (const int32_t size)
	Construct a new queue.
	~LFQueue ()
	Destruct this queue.
bool	isEmpty () const
void	clear ()
	Reset (empty) the queue.
void	resize (const int32_t size)
	Resize and reset the queue.
bool	pop (T &result)
	Retrieve and pop the front element from the queue.
bool	getFront (T &result)
	Retrieve the front element from the queue.
bool	push (const T &element)
	Push a new element to the back of the queue.
size_t	getCapacity () const

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Detailed Description

template<typename T>
class eq::base::LFQueue< T >

A thread-safe, lock-free queue with non-blocking access.

Typically used for caches and non-blocking communication between two execution threads.

Current implementation constraints:

• One reader thread
• One writer thread
• Fixed maximum size (writes may fail)
• Not copyable

Definition at line 46 of file lfQueue.h.

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Constructor & Destructor Documentation

template<typename T >

eq::base::LFQueue< T >::LFQueue

(

const int32_t

size )

[inline]

Construct a new queue.

Version:

1.0

Definition at line 50 of file lfQueue.h.

template<typename T >

eq::base::LFQueue< T >::~LFQueue

(

)

[inline]

Destruct this queue.

Version:

1.0

Definition at line 54 of file lfQueue.h.

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Member Function Documentation

template<typename T >

void eq::base::LFQueue< T >::clear

(

)

[inline]

Reset (empty) the queue.

Version:

1.0

Definition at line 60 of file lfQueue.h.

template<typename T >

size_t eq::base::LFQueue< T >::getCapacity

(

)

const [inline]

Returns:

the maximum number of elements held by the queue.

Version:

1.0

Definition at line 141 of file lfQueue.h.

template<typename T >

bool eq::base::LFQueue< T >::getFront

(

T &

result )

[inline]

Retrieve the front element from the queue.

Parameters:

result

the front value or unmodified

Returns:

true if an element was placed in result, false if the queue is empty.

Version:

1.0

Definition at line 108 of file lfQueue.h.

template<typename T >

bool eq::base::LFQueue< T >::isEmpty

(

)

const [inline]

Returns:

true if the queue is empty, false otherwise.

Version:

1.0

Definition at line 57 of file lfQueue.h.

Referenced by eq::base::LFQueue< T >::resize().

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template<typename T >

bool eq::base::LFQueue< T >::pop

(

T &

result )

[inline]

Retrieve and pop the front element from the queue.

Parameters:

result

the front value or unmodified

Returns:

true if an element was placed in result, false if the queue is empty.

Version:

1.0

Definition at line 89 of file lfQueue.h.

template<typename T >

bool eq::base::LFQueue< T >::push

(

const T &

element )

[inline]

Push a new element to the back of the queue.

Parameters:

element

the element to add.

Returns:

true if the element was placed, false if the queue is full

Version:

1.0

Definition at line 125 of file lfQueue.h.

template<typename T >

void eq::base::LFQueue< T >::resize

(

const int32_t

size )

[inline]

Resize and reset the queue.

This method is not thread-safe. The queue has to be empty.

Version:

1.0

Definition at line 73 of file lfQueue.h.

References eq::base::LFQueue< T >::isEmpty().

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

• lfQueue.h