types.hxx File Reference

#include <poll.h>
#include "cosmos/BitMask.hxx"

Go to the source code of this file.

Typedefs
using	cosmos::PollEvents = BitMask<PollEvent>
	BitMask of PollEvent flags denoting the I/O status of a file.

Enumerations
enum class	cosmos::PollEvent : short {   INPUT = POLLIN , PRIORITY = POLLPRI , OUTPUT = POLLOUT , READ_HANGUP = POLLRDHUP ,   ERROR = POLLERR , HANGUP = POLLHUP , INVALID = POLLNVAL , WRBAND = POLLWRBAND }
	Bitmask values used in the poll(2) API to describe I/O status. More...

Detailed Description

Wrappers around data structures for I/O related facilities.

Definition in file types.hxx.

Typedef Documentation

PollEvents

using cosmos::PollEvents = BitMask<PollEvent>

BitMask of PollEvent flags denoting the I/O status of a file.

Definition at line 34 of file types.hxx.

Enumeration Type Documentation

PollEvent

enum class cosmos::PollEvent : short

strong

Bitmask values used in the poll(2) API to describe I/O status.

libcosmos doesn't actively use this API currently, but the bitmask is used in some other contexts as well, like in the SigInfo data structure.

Enumerator
INPUT	there is data to read.
PRIORITY	an exceptional condition exists: out-of-band data on TCP socket, PTY master has seen a state change on the slave, a cgroup.events file has been modified.
OUTPUT	writing is possible.
READ_HANGUP	stream socket peer closed connection, or shut down the writing half of its connection.
ERROR	an error condition exists (also occurs on the write end of a pipe, when the read end has been closed).
HANGUP	hang up occurred (outstanding data might still be available)
INVALID	invalid request, the file descriptor is not open.
WRBAND	priority data may be written.

Definition at line 22 of file types.hxx.

                     : short {
        INPUT       = POLLIN,    
        PRIORITY    = POLLPRI,   
        OUTPUT      = POLLOUT,   
        READ_HANGUP = POLLRDHUP, 
        ERROR       = POLLERR,   
        HANGUP      = POLLHUP,   
        INVALID     = POLLNVAL,  
        WRBAND      = POLLWRBAND,
};