ACE_DEV_IO Class Reference

Read/Write operations on Devices. More...

#include <DEV_IO.h>

Inheritance diagram for ACE_DEV_IO:

Collaboration diagram for ACE_DEV_IO:

List of all members.

Public Member Functions
	ACE_DEV_IO (void)
	Default constructor.
ssize_t	send (const void *buf, size_t n) const
	send upto n bytes in buf.
ssize_t	recv (void *buf, size_t n) const
	Recv upto n bytes in buf.
ssize_t	send_n (const void *buf, size_t n) const
	Send n bytes, keep trying until n are sent.
Friends
class	ACE_DEV_Connector
I/O operations
Notes on common parameters: buf is the buffer to write from or receive into. len is the number of bytes to transfer. The timeout parameter in the following methods indicates how long to blocking trying to transfer data. If timeout == 0, then the call behaves as a normal send/recv call, i.e., for blocking sockets, the call will block until action is possible; for non-blocking sockets, EWOULDBLOCK will be returned if no action is immediately possible. If timeout != 0, the call will wait until the relative time specified in *timeout elapses. The "_n()" I/O methods keep looping until all the data has been transferred. These methods also work for sockets in non-blocking mode i.e., they keep looping on EWOULDBLOCK. timeout is used to make sure we keep making progress, i.e., the same timeout value is used for every I/O operation in the loop and the timeout is not counted down. The return values for the "*_n()" methods match the return values from the non "_n()" methods and are specified as follows: On complete transfer, the number of bytes transferred is returned. On timeout, -1 is returned, errno == ETIME. On error, -1 is returned, errno is set to appropriate error. On EOF, 0 is returned, errno is irrelevant. On partial transfers, i.e., if any data is transferred before timeout/error/EOF, bytes_transferred will contain the number of bytes transferred.
typedef ACE_DEV_Addr	PEER_ADDR
	Declare the dynamic allocation hooks.
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks.
ACE_DEV_Addr	addr_
	Address of device we are connected to.
ssize_t	recv_n (void *buf, size_t n, const ACE_Time_Value *timeout=0, size_t *bytes_transferred=0) const
	Declare the dynamic allocation hooks.
ssize_t	send (const iovec iov[], size_t n) const
	Send iovecs via <::writev>.
ssize_t	recv (iovec iov[], size_t n) const
	Recv iovecs via <::readv>.
ssize_t	send (size_t n,...) const
ssize_t	recv (size_t n,...) const
ssize_t	send (const void *buf, size_t n, ACE_OVERLAPPED *overlapped) const
	Send n bytes via Win32 WriteFile using overlapped I/O.
ssize_t	recv (void *buf, size_t n, ACE_OVERLAPPED *overlapped) const
	Recv n bytes via Win32 ReadFile using overlapped I/O.
void	dump (void) const
	Dump the state of an object.
int	get_local_addr (ACE_DEV_Addr &) const
	Return the local endpoint address.
int	get_remote_addr (ACE_DEV_Addr &) const

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Detailed Description

Read/Write operations on Devices.

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Member Typedef Documentation

typedef ACE_DEV_Addr ACE_DEV_IO::PEER_ADDR

Declare the dynamic allocation hooks.

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Constructor & Destructor Documentation

ACE_DEV_IO::ACE_DEV_IO

(

void

)

Default constructor.

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Member Function Documentation

void ACE_DEV_IO::dump

(

void

)

const

Dump the state of an object.

Reimplemented from ACE_DEV.

int ACE_DEV_IO::get_local_addr

(

ACE_DEV_Addr &

addr

)

const

Return the local endpoint address.

int ACE_DEV_IO::get_remote_addr

(

ACE_DEV_Addr &

addr

)

const

Return the address of the remotely connected peer (if there is one).

ssize_t ACE_DEV_IO::recv	(	void *	buf,
		size_t	n
	)		const [inline]

Recv upto n bytes in buf.

ssize_t ACE_DEV_IO::recv	(	iovec	iov[],
		size_t	n
	)		const [inline]

Recv iovecs via <::readv>.

ssize_t ACE_DEV_IO::recv	(	size_t	n,
			...
	)		const

This is an interface to ::readv, that doesn't use the struct iovec explicitly. The ... can be passed as an arbitrary number of (char *ptr, int len) tuples. However, the count N is the *total* number of trailing arguments, *not* a couple of the number of tuple pairs!

ssize_t ACE_DEV_IO::recv	(	void *	buf,
		size_t	n,
		ACE_OVERLAPPED *	overlapped
	)		const [inline]

Recv n bytes via Win32 ReadFile using overlapped I/O.

ssize_t ACE_DEV_IO::recv_n	(	void *	buf,
		size_t	n,
		const ACE_Time_Value *	timeout = 0,
		size_t *	bytes_transferred = 0
	)		const [inline]

Declare the dynamic allocation hooks.

ssize_t ACE_DEV_IO::send	(	const void *	buf,
		size_t	n
	)		const [inline]

send upto n bytes in buf.

ssize_t ACE_DEV_IO::send	(	const iovec	iov[],
		size_t	n
	)		const [inline]

Send iovecs via <::writev>.

ssize_t ACE_DEV_IO::send	(	size_t	n,
			...
	)		const

Send N char *ptrs and int lengths. Note that the char *'s precede the ints (basically, an varargs version of writev). The count N is the *total* number of trailing arguments, *not* a couple of the number of tuple pairs!

ssize_t ACE_DEV_IO::send	(	const void *	buf,
		size_t	n,
		ACE_OVERLAPPED *	overlapped
	)		const [inline]

Send n bytes via Win32 WriteFile using overlapped I/O.

ssize_t ACE_DEV_IO::send_n	(	const void *	buf,
		size_t	n
	)		const [inline]

Send n bytes, keep trying until n are sent.

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Friends And Related Function Documentation

friend class ACE_DEV_Connector [friend]

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Member Data Documentation

ACE_DEV_IO::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

Reimplemented from ACE_DEV.

ACE_DEV_Addr ACE_DEV_IO::addr_ [private]

Address of device we are connected to.

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

• DEV_IO.h
• DEV_IO.cpp
• DEV_IO.inl