tt::wfree_fifo< T, SlotSize > Class Template Reference

#include <ttauri/wfree_fifo.hpp>

Data Structures
struct	slot_type

Public Types
using	value_type = T

Public Member Functions
	wfree_fifo (wfree_fifo const &)=delete
	wfree_fifo (wfree_fifo &&)=delete
wfree_fifo &	operator= (wfree_fifo const &)=delete
wfree_fifo &	operator= (wfree_fifo &&)=delete
template<typename Operation >
bool	take_one (Operation &&operation) noexcept
	Take one message from the fifo slot.
tt_no_inline void	contended () noexcept
template<typename Message , typename... Args> requires (sizeof(Message) <= slot_type::buffer_size)
tt_force_inline void	emplace (Args &&...args) noexcept
	Create an message in-place on the fifo.
template<typename Message , typename... Args>
tt_force_inline void	emplace (Args &&...args) noexcept
	Create an message in-place on the fifo.

Static Public Attributes
static constexpr size_t	fifo_size = 65536
static constexpr size_t	slot_size = SlotSize
static constexpr size_t	num_slots = fifo_size / slot_size

Detailed Description

template<typename T, size_t SlotSize>
class tt::wfree_fifo< T, SlotSize >

A wait-free multiple-producer/single-consumer fifo designed for absolute performance.

Because of performance reasons the ring-buffer is 64kByte. Each slot in the ring buffer consists of a pointer and a byte buffer for storage.

The number of slots in the ring-buffer is dictated by the size of each slot and the ring-buffer size.

Template Parameters

T	Base class of the value type stored in the ring buffer.
SlotSize	Size of each slot, must be power-of-two.

Member Function Documentation

emplace() [1/2]

template<typename T , size_t SlotSize>

template<typename Message , typename... Args>
requires (sizeof(Message) <= slot_type::buffer_size)

tt_force_inline void tt::wfree_fifo< T, SlotSize >::emplace ( Args &&... args )

inlinenoexcept

Create an message in-place on the fifo.

Template Parameters

Message

Message type derived from value_type to be stored in a free slot.

Parameters

args	The arguments passed to the constructor of Message.

emplace() [2/2]

template<typename T , size_t SlotSize>

template<typename Message , typename... Args>

tt_force_inline void tt::wfree_fifo< T, SlotSize >::emplace ( Args &&... args )

inlinenoexcept

Create an message in-place on the fifo.

Template Parameters

Message

Message type derived from value_type to be stored in a free slot.

Parameters

args	The arguments passed to the constructor of Message.

take_one()

template<typename T , size_t SlotSize>

template<typename Operation >

bool tt::wfree_fifo< T, SlotSize >::take_one ( Operation && operation )

inlinenoexcept

Take one message from the fifo slot.

Reads one message from the ring buffer and passes it to a call of operation. If no message is available this function returns without calling operation.

Parameters

operation

A void(value_type const &) which is called when a message is available.

Returns

True if a message was available in the fifo.

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

• hikogui/src/ttauri/wfree_fifo.hpp