ACE_POSIX_Asynch_Read_File Class Reference

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:

Collaboration diagram for ACE_POSIX_Asynch_Read_File:

List of all members.

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

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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.

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Constructor & Destructor Documentation

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

(

void

)

[virtual]

Destructor.

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Member Function Documentation

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.

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
	)		[private, virtual]

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.

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

• POSIX_Asynch_IO.h
• POSIX_Asynch_IO.cpp