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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:
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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. More...
 
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. More...
 
- Public Member Functions inherited from ACE_Asynch_Read_File_Impl
virtual ~ACE_Asynch_Read_File_Impl (void)
 
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 (void)
 
- Public Member Functions inherited from ACE_Asynch_Operation_Impl
virtual ~ACE_Asynch_Operation_Impl (void)
 
- Public Member Functions inherited from ACE_POSIX_Asynch_Read_Stream
 ACE_POSIX_Asynch_Read_Stream (ACE_POSIX_Proactor *posix_proactor)
 Constructor. More...
 
virtual ~ACE_POSIX_Asynch_Read_Stream (void)
 Destructor. More...
 
- 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 (void)
 Check the documentation for ACE_Asynch_Operation::cancel. More...
 
ACE_Proactorproactor (void) const
 Return the underlying proactor. More...
 
ACE_POSIX_Proactorposix_proactor (void) const
 Return the underlying Proactor implementation. More...
 

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 (void)
 Do-nothing constructor. More...
 
- Protected Member Functions inherited from ACE_Asynch_Read_Stream_Impl
 ACE_Asynch_Read_Stream_Impl (void)
 Do-nothing constructor. More...
 
- Protected Member Functions inherited from ACE_POSIX_Asynch_Operation
 ACE_POSIX_Asynch_Operation (ACE_POSIX_Proactor *posix_proactor)
 Contructor. More...
 
virtual ~ACE_POSIX_Asynch_Operation (void)
 Destructor. More...
 
- Protected Attributes inherited from ACE_POSIX_Asynch_Operation
ACE_POSIX_Proactorposix_proactor_
 
ACE_Proactorproactor_
 Proactor that this Asynch IO will be registered with. More...
 
ACE_Handler::Proxy_Ptr handler_proxy_
 Handler that will receive the callback. More...
 
ACE_HANDLE handle_
 I/O handle used for reading. More...
 

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_Proactor posix_proactor)

Constructor.

ACE_POSIX_Asynch_Read_File::~ACE_POSIX_Asynch_Read_File ( void  )
virtual

Destructor.

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 
)
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.


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