core::multiplexer::poll::PollFdsManager Class Reference

#include <EventMultiplexer.h>

Collaboration diagram for core::multiplexer::poll::PollFdsManager:

Classes
class	VarSizeTypeAllocator
struct	PollFdIndex

Public Types
using	pollfd_vector = std::vector<pollfd, VarSizeTypeAllocator<pollfd, nfds_t>>
using	pollfdindex_map

Public Member Functions
	PollFdsManager ()
void	muxAdd (core::DescriptorEventReceiver *eventReceiver, short event)
void	muxDel (int fd, short event)
void	muxOn (const core::DescriptorEventReceiver *eventReceiver, short event)
void	muxOff (const DescriptorEventReceiver *eventReceiver, short event)
pollfd *	getEvents ()
const pollfdindex_map &	getPollFdIndices () const
nfds_t	getCurrentSize () const

Private Member Functions
void	compress ()

Private Attributes
nfds_t	nextIndex = 0
pollfd_vector	pollfds
pollfdindex_map	pollFdIndices

Detailed Description

Definition at line 68 of file EventMultiplexer.h.

Member Typedef Documentation

pollfd_vector

using core::multiplexer::poll::PollFdsManager::pollfd_vector = std::vector<pollfd, VarSizeTypeAllocator<pollfd, nfds_t>>

Definition at line 145 of file EventMultiplexer.h.

pollfdindex_map

using core::multiplexer::poll::PollFdsManager::pollfdindex_map

Initial value:

 std::unordered_map<int,
                                                   PollFdIndex,
                                                   std::hash<int>,
                                                   std::equal_to<>,
                                                   VarSizeTypeAllocator<std::pair<const int, PollFdIndex>, nfds_t>>

Definition at line 152 of file EventMultiplexer.h.

Constructor & Destructor Documentation

PollFdsManager()

core::multiplexer::poll::PollFdsManager::PollFdsManager ( )

explicit

Definition at line 69 of file EventMultiplexer.cpp.

                                   {
        pollfds.resize(1, {-1, 0, 0});
        pollFdIndices.reserve(1);
    }

Member Function Documentation

compress()

void core::multiplexer::poll::PollFdsManager::compress ( )

private

Definition at line 125 of file EventMultiplexer.cpp.

                                  {
        (void) std::remove_if(pollfds.begin(), pollfds.end(), [](const pollfd& pollFd) -> bool {
            return pollFd.fd < 0;
        });
 
        pollfds.resize(pollFdIndices.size() + 1, {-1, 0, 0});
 
        pollFdIndices.reserve(pollFdIndices.size() + 1);
 
        for (uint32_t i = 0; i < pollFdIndices.size(); i++) {
            pollFdIndices[pollfds[i].fd].index = i;
        }
 
        nextIndex = pollFdIndices.size();
    }

Referenced by muxDel().

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getCurrentSize()

nfds_t core::multiplexer::poll::PollFdsManager::getCurrentSize

(

)

const

Definition at line 149 of file EventMultiplexer.cpp.

                                                {
        return nextIndex;
    }

getEvents()

pollfd * core::multiplexer::poll::PollFdsManager::getEvents

(

)

Definition at line 141 of file EventMultiplexer.cpp.

                                      {
        return pollfds.data();
    }

getPollFdIndices()

const PollFdsManager::pollfdindex_map & core::multiplexer::poll::PollFdsManager::getPollFdIndices

(

)

const

Definition at line 145 of file EventMultiplexer.cpp.

                                                                                {
        return pollFdIndices;
    }

muxAdd()

void core::multiplexer::poll::PollFdsManager::muxAdd	(	core::DescriptorEventReceiver *	eventReceiver,
		short	event )

Definition at line 74 of file EventMultiplexer.cpp.

                                                                                       {
        const int fd = eventReceiver->getRegisteredFd();
 
        if (!pollFdIndices.contains(fd)) {
            pollfds[nextIndex].events = event;
            pollfds[nextIndex].fd = fd;
 
            pollFdIndices[fd].index = nextIndex;
            pollFdIndices[fd].events = event;
 
            ++nextIndex;
 
            if (nextIndex == pollfds.size()) {
                pollfds.resize(pollfds.size() * 2, {-1, 0, 0});
                pollFdIndices.reserve(pollfds.size());
            }
        } else {
            PollFdIndex& pollFdIndex = pollFdIndices[fd];
 
            pollfds[pollFdIndex.index].events |= event;
            pollFdIndex.events |= event;
        }
    }

References core::multiplexer::poll::PollFdsManager::PollFdIndex::events, and core::DescriptorEventReceiver::getRegisteredFd().

Referenced by core::multiplexer::poll::DescriptorEventPublisher::muxAdd().

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muxDel()

void core::multiplexer::poll::PollFdsManager::muxDel	(	int	fd,
		short	event )

Definition at line 98 of file EventMultiplexer.cpp.

                                                   {
        const pollfdindex_map::iterator itPollFdIndex = pollFdIndices.find(fd);
 
        PollFdIndex& pollFdIndex = itPollFdIndex->second;
 
        pollfds[pollFdIndex.index].events &= static_cast<short>(~event); // tilde promotes to int
        pollFdIndex.events &= static_cast<short>(~event);                // tilde promotes to int
 
        if (pollFdIndex.events == 0) {
            pollfds[pollFdIndex.index].fd = -1; // Compress will keep track of that descriptor
            pollFdIndices.erase(fd);
 
            if (pollfds.size() > (pollFdIndices.size() * 2) + 1) {
                compress();
            }
        }
    }

References compress(), and core::multiplexer::poll::PollFdsManager::PollFdIndex::events.

Referenced by core::multiplexer::poll::DescriptorEventPublisher::muxDel().

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muxOff()

void core::multiplexer::poll::PollFdsManager::muxOff	(	const DescriptorEventReceiver *	eventReceiver,
		short	event )

Definition at line 120 of file EventMultiplexer.cpp.

                                                                                         {
        pollfds[pollFdIndices.find(eventReceiver->getRegisteredFd())->second.index].events &=
            static_cast<short>(~event); // Tilde promotes to int
    }

Referenced by core::multiplexer::poll::DescriptorEventPublisher::muxOff().

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muxOn()

void core::multiplexer::poll::PollFdsManager::muxOn	(	const core::DescriptorEventReceiver *	eventReceiver,
		short	event )

Definition at line 116 of file EventMultiplexer.cpp.

                                                                                        {
        pollfds[pollFdIndices.find(eventReceiver->getRegisteredFd())->second.index].events |= event;
    }

Referenced by core::multiplexer::poll::DescriptorEventPublisher::muxOn().

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Member Data Documentation

nextIndex

nfds_t core::multiplexer::poll::PollFdsManager::nextIndex = 0

private

Definition at line 172 of file EventMultiplexer.h.

pollFdIndices

pollfdindex_map core::multiplexer::poll::PollFdsManager::pollFdIndices

private

Definition at line 176 of file EventMultiplexer.h.

pollfds

pollfd_vector core::multiplexer::poll::PollFdsManager::pollfds

private

Definition at line 175 of file EventMultiplexer.h.

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

• core/multiplexer/poll/EventMultiplexer.h
• core/multiplexer/poll/EventMultiplexer.cpp