drizzle_plugin::Vio Class Reference

Virtual I/O layer, only used with TCP/IP sockets at the moment. More...

#include <vio.h>

List of all members.

Public Member Functions
	Vio (int sd)
int	close ()
size_t	read (unsigned char *buf, size_t size)
size_t	write (const unsigned char *buf, size_t size)
int	blocking (bool set_blocking_mode, bool *old_mode)
int	fastsend ()
int32_t	keepalive (bool set_keep_alive)
bool	should_retry () const
bool	was_interrupted () const
bool	peer_addr (char *buf, uint16_t *port, size_t buflen) const
void	timeout (bool is_sndtimeo, int32_t timeout)
int	get_errno () const
int	get_fd () const
char *	get_read_pos () const
char *	get_read_end () const
Private Attributes
bool	closed
int	sd
int	fcntl_mode
struct sockaddr_storage	local
struct sockaddr_storage	remote
char *	read_pos
char *	read_end

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Detailed Description

Virtual I/O layer, only used with TCP/IP sockets at the moment.

Definition at line 28 of file vio.h.

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Constructor & Destructor Documentation

drizzle_plugin::Vio::Vio

(

int

sd

)

Constructor.

Parameters:

[in]

sd

Descriptor to use.

Definition at line 46 of file vio.cc.

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Member Function Documentation

int drizzle_plugin::Vio::blocking	(	bool	set_blocking_mode,
		bool *	old_mode
	)

Set device blocking mode.

Parameters:

[in]	set_blocking_mode	Whether the device should block. true sets blocking mode, false clears it.
[out]	old_mode	This will be set to the previous blocking mode.

Returns:

0 on success.

Definition at line 112 of file vio.cc.

int drizzle_plugin::Vio::close

(

void

)

Close the connection.

Returns:

0 on success.

Definition at line 75 of file vio.cc.

int drizzle_plugin::Vio::fastsend

(

)

Enables fast sending. Setting this sets the TCP_NODELAY socket option.

Returns:

0 on succcess.

Definition at line 140 of file vio.cc.

int drizzle_plugin::Vio::get_errno

(

)

const

Returns the last error code.

Returns:

the last error code, as described in errno.h

Definition at line 233 of file vio.cc.

int drizzle_plugin::Vio::get_fd

(

)

const

Get the underlying descriptor this class is using.

Returns:

The descriptor passed in to the constructor of this class.

Definition at line 238 of file vio.cc.

char * drizzle_plugin::Vio::get_read_end

(

)

const

Returns the current write position.

Definition at line 249 of file vio.cc.

char * drizzle_plugin::Vio::get_read_pos

(

)

const

Returns the current read position.

Definition at line 244 of file vio.cc.

int32_t drizzle_plugin::Vio::keepalive

(

bool

set_keep_alive

)

Sets or clears the keepalive option.

Parameters:

[in]

set_keep_alive

Whether to set or clear the flag. True Sets keepalive, false clears it.

Returns:

0 on success.

Definition at line 155 of file vio.cc.

bool drizzle_plugin::Vio::peer_addr	(	char *	buf,
		uint16_t *	port,
		size_t	buflen
	)		const

Gets the address details of the peer.

Parameters:

[out]	buf	Buffer that will recieve the peer address.
[out]	port	Port of remote end.
[in]	buflen	Size of buf.

Returns:

True on success, false otherwise.

Definition at line 187 of file vio.cc.

size_t drizzle_plugin::Vio::read	(	unsigned char *	buf,
		size_t	size
	)

Read some data from the remote end.

Parameters:

[out]	buf	A buffer to write the new data to.
[in]	size	The size of the buffer

Returns:

The number of bytes read.

Definition at line 92 of file vio.cc.

bool drizzle_plugin::Vio::should_retry

(

)

const

Returns:

true if the caller should retry the last operation.

Definition at line 173 of file vio.cc.

void drizzle_plugin::Vio::timeout	(	bool	is_sndtimeo,
		int32_t	timeout
	)

Sets either the send, or recieve timeouts for the socket.

Parameters:

[in]	is_sndtimeo	Set to true to change the send timeout, false to change the recieve timeout.
[in]	timeout	The new timeout to set, in seconds.

Definition at line 212 of file vio.cc.

bool drizzle_plugin::Vio::was_interrupted

(

)

const

Returns:

true if the last operation was interrupted.

Definition at line 180 of file vio.cc.

size_t drizzle_plugin::Vio::write	(	const unsigned char *	buf,
		size_t	size
	)

Write some data to the remote end.

Parameters:

[in]	buf	A buffer that contains the data to send.
[in]	size	The size of the buffer

Returns:

The number of bytes written.

Definition at line 103 of file vio.cc.

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

• plugin/mysql_protocol/vio.h
• plugin/mysql_protocol/vio.cc