This class is a factory for starting off asynchronous reads on a file. This class implements <ACE_Asynch_Read_File> for all POSIX implementations of Proactor. More...

#include <POSIX_Asynch_IO.h>

Inheritance diagram for ACE_POSIX_Asynch_Read_File:

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Collaboration diagram for ACE_POSIX_Asynch_Read_File:

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Public Member Functions
	ACE_POSIX_Asynch_Read_File (ACE_POSIX_Proactor *posix_proactor)
	Constructor.

int	read (ACE_Message_Block &message_block, size_t bytes_to_read, u_long offset, u_long offset_high, const void *act, int priority, int signal_number=0)

virtual	~ACE_POSIX_Asynch_Read_File ()
	Destructor.

Public Member Functions inherited from ACE_Asynch_Read_File_Impl
virtual	~ACE_Asynch_Read_File_Impl ()

virtual int	readv (ACE_Message_Block &message_block, size_t bytes_to_read, u_long offset, u_long offset_high, const void *act, int priority, int signal_number)=0

virtual int	readv (ACE_Message_Block &message_block, size_t bytes_to_read, const void *act, int priority, int signal_number)=0

Public Member Functions inherited from ACE_Asynch_Read_Stream_Impl
virtual	~ACE_Asynch_Read_Stream_Impl ()

Public Member Functions inherited from ACE_Asynch_Operation_Impl
virtual	~ACE_Asynch_Operation_Impl ()

Public Member Functions inherited from ACE_POSIX_Asynch_Read_Stream
	ACE_POSIX_Asynch_Read_Stream (ACE_POSIX_Proactor *posix_proactor)
	Constructor.

int	read (ACE_Message_Block &message_block, size_t bytes_to_read, const void *act, int priority, int signal_number=0)

virtual	~ACE_POSIX_Asynch_Read_Stream ()
	Destructor.

Public Member Functions inherited from ACE_POSIX_Asynch_Operation
int	open (const ACE_Handler::Proxy_Ptr &handler_proxy, ACE_HANDLE handle, const void completion_key, ACE_Proactor proactor=0)

int	cancel ()
	Check the documentation for ACE_Asynch_Operation::cancel.

ACE_Proactor *	proactor () const
	Return the underlying proactor.

ACE_POSIX_Proactor *	posix_proactor () const
	Return the underlying Proactor implementation.

Private Member Functions
int	read (ACE_Message_Block &message_block, size_t bytes_to_read, const void *act, int priority, int signal_number=0)

Additional Inherited Members
Protected Member Functions inherited from ACE_Asynch_Read_File_Impl
	ACE_Asynch_Read_File_Impl ()
	Do-nothing constructor.

Protected Member Functions inherited from ACE_Asynch_Read_Stream_Impl
	ACE_Asynch_Read_Stream_Impl ()
	Do-nothing constructor.

Protected Member Functions inherited from ACE_Asynch_Operation_Impl
	ACE_Asynch_Operation_Impl ()
	Do-nothing constructor.

Protected Member Functions inherited from ACE_POSIX_Asynch_Operation
	ACE_POSIX_Asynch_Operation (ACE_POSIX_Proactor *posix_proactor)
	Constructor.

virtual	~ACE_POSIX_Asynch_Operation ()
	Destructor.

Protected Attributes inherited from ACE_POSIX_Asynch_Operation
ACE_POSIX_Proactor *	posix_proactor_

ACE_Proactor *	proactor_
	Proactor that this Asynch IO will be registered with.

ACE_Handler::Proxy_Ptr	handler_proxy_
	Handler that will receive the callback.

ACE_HANDLE	handle_
	I/O handle used for reading.

Detailed Description

This class is a factory for starting off asynchronous reads on a file. This class implements <ACE_Asynch_Read_File> for all POSIX implementations of Proactor.

Once <open> is called, multiple asynchronous <read>s can started using this class. A <ACE_Asynch_Read_File::Result> will be passed back to the handler when the asynchronous reads completes through the <ACE_Handler::handle_read_file> callback.

This class differs slightly from <ACE_Asynch_Read_Stream> as it allows the user to specify an offset for the read.

Constructor & Destructor Documentation

◆ ACE_POSIX_Asynch_Read_File()

ACE_POSIX_Asynch_Read_File::ACE_POSIX_Asynch_Read_File ( ACE_POSIX_Proactor * posix_proactor )

Constructor.

◆ ~ACE_POSIX_Asynch_Read_File()

ACE_POSIX_Asynch_Read_File::~ACE_POSIX_Asynch_Read_File ( )

virtual

Destructor.

Member Function Documentation

◆ read() [1/2]

int ACE_POSIX_Asynch_Read_File::read	(	ACE_Message_Block &	message_block,
		size_t	bytes_to_read,
		const void *	act,
		int	priority,
		int	signal_number = 0 )

privatevirtual

This belongs to ACE_POSIX_Asynch_Read_Stream. We have defined this here to avoid compiler warnings and forward the method to <ACE_POSIX_Asynch_Read_Stream::read>.

Implements ACE_Asynch_Read_File_Impl.

◆ read() [2/2]

int ACE_POSIX_Asynch_Read_File::read	(	ACE_Message_Block &	message_block,
		size_t	bytes_to_read,
		u_long	offset,
		u_long	offset_high,
		const void *	act,
		int	priority,
		int	signal_number = 0 )

virtual

This starts off an asynchronous read. Upto bytes_to_read will be read and stored in the message_block. The read will start at offset from the beginning of the file.

Implements ACE_Asynch_Read_File_Impl.

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

Public Member Functions

Private Member Functions