seastar::pollable_fd_state Class Reference

Classes
struct	speculation

Public Member Functions
	pollable_fd_state (const pollable_fd_state &)=delete
void	operator= (const pollable_fd_state &)=delete
void	speculate_epoll (int events)
bool	take_speculation (int events)
future< size_t >	read_some (char *buffer, size_t size)
future< size_t >	read_some (uint8_t *buffer, size_t size)
future< size_t >	read_some (const std::vector< iovec > &iov)
future< temporary_buffer< char > >	read_some (internal::buffer_allocator *ba)
future	write_all (const char *buffer, size_t size)
future	write_all (const uint8_t *buffer, size_t size)
future< size_t >	write_some (net::packet &p)
future	write_all (net::packet &p)
future	readable ()
future	writeable ()
future	readable_or_writeable ()
future< std::tuple< pollable_fd, socket_address > >	accept ()
future	connect (socket_address &sa)
future< temporary_buffer< char > >	recv_some (internal::buffer_allocator *ba)
future< size_t >	sendmsg (struct msghdr *msg)
future< size_t >	recvmsg (struct msghdr *msg)
future< size_t >	sendto (socket_address addr, const void *buf, size_t len)
future	poll_rdhup ()

Public Attributes
file_desc	fd
bool	events_rw = false
unsigned	shutdown_mask = 0
int	events_requested = 0
int	events_epoll = 0
int	events_known = 0

Protected Member Functions
	pollable_fd_state (file_desc fd, speculation speculate=speculation())

Member Function Documentation

speculate_epoll()

void seastar::pollable_fd_state::speculate_epoll ( int  events )

inline

Set the speculation of specified I/O events

We try to speculate. If an I/O is completed successfully without being blocked and it didn't return the short read/write. We anticipate that the next I/O will also be non-blocking and will not return EAGAIN. But the speculation is invalidated once it is "used" by take_speculation()

take_speculation()

bool seastar::pollable_fd_state::take_speculation ( int  events )

inline

Check whether we speculate specified I/O is possible on the fd, invalidate the speculation if it matches with all specified events.

Returns

true if the current speculation includes all specified events

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

• seastar/core/internal/pollable_fd.hh