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ACE_Asynch_Operation Class Reference

This is an interface base class for all asynch operations. The resposiblility of this class is to forward all methods to its delegation/implementation class, e.g., ACE_WIN32_Asynch_Operation or ACE_POSIX_Asynch_Operation. More...

#include <Asynch_IO.h>

Inheritance diagram for ACE_Asynch_Operation:

[legend]Collaboration diagram for ACE_Asynch_Operation:

[legend]List of all members.

Public Methods
int	open (ACE_Handler &handler, ACE_HANDLE handle, const void *completion_key, ACE_Proactor *proactor)
int	cancel (void)
ACE_Proactor *	proactor (void) const
	Return the underlying proactor.
virtual	~ACE_Asynch_Operation (void)
	Destructor.
Protected Methods
	ACE_Asynch_Operation (void)
	Constructor.
ACE_Asynch_Operation_Impl *	implementation (void) const
	Return the underlying implementation class.
void	implementation (ACE_Asynch_Operation_Impl *implementation)
	Set the implementation class.
ACE_Proactor *	get_proactor (ACE_Proactor *user_proactor, ACE_Handler &handler) const
	Get a proactor for/from the user.
Protected Attributes
ACE_Asynch_Operation_Impl *	implementation_
	Implementation class.

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Detailed Description

This is an interface base class for all asynch operations. The resposiblility of this class is to forward all methods to its delegation/implementation class, e.g., ACE_WIN32_Asynch_Operation or ACE_POSIX_Asynch_Operation.

There are some attributes and functionality which is common to all asychronous operations. The delegation classes of this class will factor out this code.

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Constructor & Destructor Documentation

ACE_Asynch_Operation::~ACE_Asynch_Operation (  void    )  [virtual]

Destructor.

ACE_Asynch_Operation::ACE_Asynch_Operation (  void    )  [protected]

Constructor.

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Member Function Documentation

int ACE_Asynch_Operation::cancel (  void    )

(Attempts to) cancel the asynchronous operation pending against the <handle> registered with this Operation. All completion notifications for the I/O operations will occur normally. = Return Values: -1 : Operation failed. (can get only in POSIX). 0 : All the operations were cancelled. 1 : All the operations were already finished in this handle. Unable to cancel them. 2 : Atleast one of the requested operations cannot be cancelled. There is slight difference in the semantics between NT and POSIX platforms which is given below. = Win32 : cancels all pending accepts operations that were issued by the calling thread. The function does not cancel asynchronous operations issued by other threads. All I/O operations that are canceled will complete with the error ERROR_OPERATION_ABORTED. = POSIX: Attempts to cancel one or more asynchronous I/O requests currently outstanding against the <handle> registered in this operation. For requested operations that are successfully canceled, the associated error status is set to ECANCELED.

ACE_Proactor * ACE_Asynch_Operation::get_proactor (  ACE_Proactor *    user_proactor, ACE_Handler &    handler )  const [protected]

Get a proactor for/from the user.

void ACE_Asynch_Operation::implementation (  ACE_Asynch_Operation_Impl *    implementation )  [protected]

Set the implementation class.

ACE_Asynch_Operation_Impl * ACE_Asynch_Operation::implementation (  void    )  const [protected]

Return the underlying implementation class. Reimplemented in ACE_Asynch_Read_Stream, ACE_Asynch_Write_Stream, ACE_Asynch_Read_File, ACE_Asynch_Write_File, ACE_Asynch_Accept, ACE_Asynch_Connect, ACE_Asynch_Transmit_File, ACE_Asynch_Read_Dgram, and ACE_Asynch_Write_Dgram.

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

Initializes the factory with information which will be used with each asynchronous call. If (<handle> == ACE_INVALID_HANDLE), <ACE_Handler::handle> will be called on the <handler> to get the correct handle. Reimplemented in ACE_Asynch_Read_Stream, ACE_Asynch_Write_Stream, ACE_Asynch_Read_File, ACE_Asynch_Write_File, ACE_Asynch_Accept, ACE_Asynch_Connect, ACE_Asynch_Transmit_File, ACE_Asynch_Read_Dgram, and ACE_Asynch_Write_Dgram.

ACE_Proactor * ACE_Asynch_Operation::proactor (  void    )  const

Return the underlying proactor.

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Member Data Documentation

ACE_Asynch_Operation_Impl* ACE_Asynch_Operation::implementation_ [protected]

Implementation class. Reimplemented in ACE_Asynch_Read_Stream, ACE_Asynch_Write_Stream, ACE_Asynch_Read_File, ACE_Asynch_Write_File, ACE_Asynch_Accept, ACE_Asynch_Connect, ACE_Asynch_Transmit_File, ACE_Asynch_Read_Dgram, and ACE_Asynch_Write_Dgram.

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

• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/Asynch_IO.h
• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/Asynch_IO.cpp

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