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ACE_POSIX_AIOCB_Asynch_Read_File Class Reference

This class is a factory for starting off asynchronous reads on a file. This class implements for (Asynchronous I/O Control Blocks) based implementation of Proactor. More...

#include <POSIX_Asynch_IO.h>

Inheritance diagram for ACE_POSIX_AIOCB_Asynch_Read_File

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List of all members.

Public Methods

 ACE_POSIX_AIOCB_Asynch_Read_File (ACE_POSIX_AIOCB_Proactor *posix_aiocb_proactor)
 Constructor.

int read (ACE_Message_Block &message_block, u_long bytes_to_read, u_long offset, u_long offset_high, const void *act, int priority, int signal_number = 0)
virtual ~ACE_POSIX_AIOCB_Asynch_Read_File (void)
 Destructor.

int open (ACE_Handler &handler, ACE_HANDLE handle, const void *completion_key, ACE_Proactor *proactor = 0)
int cancel (void)
 Not implemented. Returns 0. More...

ACE_Proactorproactor (void) const
 Return the underlying proactor.


Private Methods

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

Detailed Description

This class is a factory for starting off asynchronous reads on a file. This class implements for (Asynchronous I/O Control Blocks) based implementation of Proactor.

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

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


Constructor & Destructor Documentation

ACE_POSIX_AIOCB_Asynch_Read_File::ACE_POSIX_AIOCB_Asynch_Read_File ( ACE_POSIX_AIOCB_Proactor * posix_aiocb_proactor )
 

Constructor.

ACE_POSIX_AIOCB_Asynch_Read_File::~ACE_POSIX_AIOCB_Asynch_Read_File ( void ) [virtual]
 

Destructor.


Member Function Documentation

int ACE_POSIX_AIOCB_Asynch_Read_File::cancel ( void )
 

Not implemented. Returns 0.

@

Reimplemented from ACE_POSIX_AIOCB_Asynch_Read_Stream.

int ACE_POSIX_AIOCB_Asynch_Read_File::open ( ACE_Handler & handler,
ACE_HANDLE handle,
const void * completion_key,
ACE_Proactor * proactor = 0 )
 

Initializes the factory with information which will be used with each asynchronous call. If (<handle> == ACE_INVALID_HANDLE), will be called on the <handler> to get the correct handle.

Reimplemented from ACE_POSIX_AIOCB_Asynch_Read_Stream.

ACE_Proactor * ACE_POSIX_AIOCB_Asynch_Read_File::proactor ( void ) const
 

Return the underlying proactor.

Reimplemented from ACE_POSIX_AIOCB_Asynch_Read_Stream.

int ACE_POSIX_AIOCB_Asynch_Read_File::read ( ACE_Message_Block & message_block,
u_long bytes_to_read,
const void * act,
int priority,
int signal_number = 0 ) [private]
 

This belongs to ACE_POSIX_AIOCB_Asynch_Read_Stream. We have defined this here to avoid compiler warnings and forward the method to .

Reimplemented from ACE_POSIX_AIOCB_Asynch_Read_Stream.

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

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.


The documentation for this class was generated from the following files:
Generated at Fri Oct 5 07:03:28 2001 for ACE by doxygen1.2.3 written by Dimitri van Heesch, © 1997-2000