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server/dep/ACE_wrappers/ace/WIN32_Asynch_IO.h

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// -*- C++ -*-
//=============================================================================
/**
* @file WIN32_Asynch_IO.h
*
* $Id: WIN32_Asynch_IO.h 92298 2010-10-21 11:15:17Z johnnyw $
*
*
* These classes only works on Win32 platforms.
*
* The implementation of ACE_Asynch_Transmit_File,
* ACE_Asynch_Accept, and ACE_Asynch_Connect are only supported if
* ACE_HAS_WINSOCK2 is defined or you are on WinNT 4.0 or higher.
*
*
* @author Irfan Pyarali <irfan@cs.wustl.edu>
* @author Tim Harrison <harrison@cs.wustl.edu>
* @author Alexander Babu Arulanthu <alex@cs.wustl.edu>
* @author Roger Tragin <r.tragin@computer.org>
* @author Alexander Libman <alibman@ihug.com.au>
*/
//=============================================================================
#ifndef ACE_WIN32_ASYNCH_IO_H
#define ACE_WIN32_ASYNCH_IO_H
#include /**/ "ace/pre.h"
#include /**/ "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (ACE_HAS_WIN32_OVERLAPPED_IO) && \
(defined (ACE_HAS_WINSOCK2) && (ACE_HAS_WINSOCK2 == 1))
#include "ace/Asynch_IO_Impl.h"
#include "ace/Addr.h"
#include "ace/Event_Handler.h"
#include "ace/Handle_Set.h"
#include "ace/Map_Manager.h"
#include "ace/Null_Mutex.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
// Forward declaration
class ACE_WIN32_Proactor;
/**
* @class ACE_WIN32_Asynch_Result
*
* @brief An abstract class which adds information to the OVERLAPPED
* structure to make it more useful.
*
* An abstract base class from which you can obtain some basic
* information like the number of bytes transferred, the ACT
* associated with the asynchronous operation, indication of
* success or failure, etc. Subclasses may want to store more
* information that is particular to the asynchronous operation
* it represents.
*/
class ACE_Export ACE_WIN32_Asynch_Result : public virtual ACE_Asynch_Result_Impl,
public OVERLAPPED
{
/// Factory class has special permissions.
friend class ACE_WIN32_Asynch_Accept;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Result (void);
/// Simulate error value to use in the post_completion()
void set_error (u_long errcode);
/// Simulate value to use in the post_completion()
void set_bytes_transferred (size_t nbytes);
protected:
/// Constructor.
ACE_WIN32_Asynch_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
const void* act,
ACE_HANDLE event,
u_long offset,
u_long offset_high,
int priority,
int signal_number = 0);
/// Proxy for the ACE_Handler that will be called back.
ACE_Handler::Proxy_Ptr handler_proxy_;
/// ACT for this operation.
const void *act_;
/// Bytes transferred by this operation.
size_t bytes_transferred_;
/// Success indicator.
int success_;
/// ACT associated with handle.
const void *completion_key_;
/// Error if operation failed.
u_long error_;
};
/**
* @class ACE_WIN32_Asynch_Operation
*
* @brief This class abstracts out the common things needed for
* implementing Asynch_Operation for WIN32 platform.
*
*/
class ACE_Export ACE_WIN32_Asynch_Operation : public virtual ACE_Asynch_Operation_Impl
{
public:
/**
* Initializes the factory with information which will be used with
* each asynchronous call. If (@a handle == ACE_INVALID_HANDLE),
* ACE_Handler::handle() will be called on the @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
// = Access methods.
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
protected:
/// Constructor.
ACE_WIN32_Asynch_Operation (ACE_WIN32_Proactor *win32_proactor);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Operation (void);
/// Win32 Proactor.
ACE_WIN32_Proactor *win32_proactor_;
/// Proactor that this asynch IO is registered with.
ACE_Proactor *proactor_;
/// Handler that will receive the callback.
ACE_Handler::Proxy_Ptr handler_proxy_;
/// I/O handle used for reading.
ACE_HANDLE handle_;
};
/**
* @class ACE_WIN32_Asynch_Read_Stream_Result
*
* @brief This class provides concrete implementation for
* ACE_Asynch_Read_Stream::Result class.
*/
class ACE_Export ACE_WIN32_Asynch_Read_Stream_Result : public virtual ACE_Asynch_Read_Stream_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory class will have special permissions.
friend class ACE_WIN32_Asynch_Read_Stream;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// The number of bytes which were requested at the start of the
/// asynchronous read.
size_t bytes_to_read (void) const;
/// Message block which contains the read data.
ACE_Message_Block &message_block (void) const;
/// I/O handle used for reading.
ACE_HANDLE handle (void) const;
// Base class operations. These operations are here to kill
// dominance warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
/// Accessor for the scatter read flag
int scatter_enabled (void) const;
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Read_Stream factory.
ACE_WIN32_Asynch_Read_Stream_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
size_t bytes_to_read,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0,
int scatter_enabled = 0);
/// Proactor will call this method when the read completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_Stream_Result (void);
/// Bytes requested when the asynchronous read was initiated.
size_t bytes_to_read_;
/// Message block for reading the data into.
ACE_Message_Block &message_block_;
/// I/O handle used for reading.
ACE_HANDLE handle_;
/// Flag for scatter read
int scatter_enabled_;
};
/**
* @class ACE_WIN32_Asynch_Read_Stream
*
* @brief This class is a factory for starting off asynchronous reads
* on a stream.
*
* Once open() is called, multiple asynchronous read()s can
* started using this class. An ACE_Asynch_Read_Stream::Result
* will be passed back to the @a handler when the asynchronous
* reads completes through the <ACE_Handler::handle_read_stream>
* callback.
*/
class ACE_Export ACE_WIN32_Asynch_Read_Stream : public virtual ACE_Asynch_Read_Stream_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Read_Stream (ACE_WIN32_Proactor *win32_proactor);
/// This starts off an asynchronous read. Upto @a bytes_to_read will
/// be read and stored in the @a message_block.
int read (ACE_Message_Block &message_block,
size_t bytes_to_read,
const void *act,
int priority,
int signal_number = 0);
/**
* Same as above but with scatter support, through chaining of composite
* message blocks using the continuation field.
*/
int readv (ACE_Message_Block &message_block,
size_t bytes_to_read,
const void *act,
int priority,
int signal_number = 0);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_Stream (void);
// Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* Initializes the factory with information which will be used with
* each asynchronous call. If (@a handle == ACE_INVALID_HANDLE),
* ACE_Handler::handle() will be called on the @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
protected:
/// This is the method which does the real work and is there so that
/// the ACE_Asynch_Read_File class can use it too.
int shared_read (ACE_WIN32_Asynch_Read_Stream_Result *result);
};
/**
* @class ACE_WIN32_Asynch_Write_Stream_Result
*
* @brief This class provides concrete implementation for
* ACE_Asynch_Write_Stream::Result class.
*/
class ACE_Export ACE_WIN32_Asynch_Write_Stream_Result : public virtual ACE_Asynch_Write_Stream_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory class willl have special permissions.
friend class ACE_WIN32_Asynch_Write_Stream;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// The number of bytes which were requested at the start of the
/// asynchronous write.
size_t bytes_to_write (void) const;
/// Message block that contains the data to be written.
ACE_Message_Block &message_block (void) const;
/// I/O handle used for writing.
ACE_HANDLE handle (void) const;
// = Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
/// Accessor for the gather write flag
int gather_enabled (void) const;
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Write_Stream factory.
ACE_WIN32_Asynch_Write_Stream_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
size_t bytes_to_write,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0,
int gather_enabled = 0);
/// ACE_Proactor will call this method when the write completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Write_Stream_Result (void);
/// The number of bytes which were requested at the start of the
/// asynchronous write.
size_t bytes_to_write_;
/// Message block that contains the data to be written.
ACE_Message_Block &message_block_;
/// I/O handle used for writing.
ACE_HANDLE handle_;
/// Flag for gather write
int gather_enabled_;
};
/**
* @class ACE_WIN32_Asynch_Write_Stream
*
* @brief This class is a factory for starting off asynchronous writes
* on a stream.
*
*
* Once open() is called, multiple asynchronous <writes>s can
* started using this class. A ACE_Asynch_Write_Stream::Result
* will be passed back to the @a handler when the asynchronous
* write completes through the
* ACE_Handler::handle_write_stream() callback.
*/
class ACE_Export ACE_WIN32_Asynch_Write_Stream : public virtual ACE_Asynch_Write_Stream_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Write_Stream (ACE_WIN32_Proactor *win32_proactor);
/// This starts off an asynchronous write. Upto @a bytes_to_write
/// will be written from the @a message_block.
int write (ACE_Message_Block &message_block,
size_t bytes_to_write,
const void *act,
int priority,
int signal_number = 0);
/**
* Same as above but with gather support, through chaining of composite
* message blocks using the continuation field.
*/
int writev (ACE_Message_Block &message_block,
size_t bytes_to_write,
const void *act,
int priority,
int signal_number = 0);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Write_Stream (void);
// = Methods belonging to <ACE_WIN32_Asynch_Operation> base class.
// These methods are defined here to avoid VC++ warnings. They route
// the call to the <ACE_WIN32_Asynch_Operation> base class.
/**
* Initializes the factory with information which will be used with
* each asynchronous call. If (@a handle == ACE_INVALID_HANDLE),
* ACE_Handler::handle() will be called on the @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
protected:
/// This is the method which does the real work and is there so that
/// the ACE_Asynch_Write_File class can use it too.
int shared_write (ACE_WIN32_Asynch_Write_Stream_Result *result);
};
/**
* @class ACE_WIN32_Asynch_Read_File_Result
*
* @brief This class provides concrete implementation for
* ACE_Asynch_Read_File::Result class.
*/
class ACE_Export ACE_WIN32_Asynch_Read_File_Result : public virtual ACE_Asynch_Read_File_Result_Impl,
public ACE_WIN32_Asynch_Read_Stream_Result
{
/// Factory class will have special permissions.
friend class ACE_WIN32_Asynch_Read_File;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
// = These methods belong to ACE_WIN32_Asynch_Result class base
// class. These operations are here to kill some warnings. These
// methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
// The following methods belong to
// ACE_WIN32_Asynch_Read_Stream_Result. They are here to avoid VC++
// dominance warnings. These methods route their call to the
// ACE_WIN32_Asynch_Read_Stream_Result base class.
/// The number of bytes which were requested at the start of the
/// asynchronous read.
size_t bytes_to_read (void) const;
/// Message block which contains the read data.
ACE_Message_Block &message_block (void) const;
/// I/O handle used for reading.
ACE_HANDLE handle (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Read_File factory.
ACE_WIN32_Asynch_Read_File_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
size_t bytes_to_read,
const void* act,
u_long offset,
u_long offset_high,
ACE_HANDLE event,
int priority,
int signal_number = 0,
int scatter_enabled = 0);
/// ACE_Proactor will call this method when the read completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_File_Result (void);
};
/**
* @class ACE_WIN32_Asynch_Read_File
*
* @brief This class is a factory for starting off asynchronous reads
* on a file.
*
* 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 @a 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.
*/
class ACE_Export ACE_WIN32_Asynch_Read_File : public virtual ACE_Asynch_Read_File_Impl,
public ACE_WIN32_Asynch_Read_Stream
{
public:
/// Constructor.
ACE_WIN32_Asynch_Read_File (ACE_WIN32_Proactor *win32_proactor);
/**
* This starts off an asynchronous read. Upto @a bytes_to_read will
* be read and stored in the @a message_block. The read will start
* at @a offset from the beginning of the file.
*/
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);
/**
* Same as above but with scatter support, through chaining of
* composite message blocks using the continuation field.
* @note Each data block payload must be at least the size of a
* system memory page and must be aligned on a system memory page
* size boundary
*/
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);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_File (void);
// = Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
private:
/**
* This method belongs to ACE_WIN32_Asynch_Read_Stream. It is here
* to avoid the compiler warnings. We forward this call to the
* ACE_WIN32_Asynch_Read_Stream class.
*/
int read (ACE_Message_Block &message_block,
size_t bytes_to_read,
const void *act,
int priority,
int signal_number = 0);
/**
* Same as above but with scatter support, through chaining of composite
* message blocks using the continuation field.
*/
int readv (ACE_Message_Block &message_block,
size_t bytes_to_read,
const void *act,
int priority,
int signal_number = 0);
};
/**
* @class ACE_WIN32_Asynch_Write_File_Result
*
* @brief This class provides implementation for
* ACE_Asynch_Write_File_Result for WIN32 platforms.
*
* This class has all the information necessary for the
* @a handler to uniquiely identify the completion of the
* asynchronous write.
*
* This class differs slightly from
* ACE_Asynch_Write_Stream::Result as it calls back
* <ACE_Handler::handle_write_file> on the @a handler instead
* of <ACE_Handler::handle_write_stream>. No additional state
* is required by this class as ACE_Asynch_Result can store
* the @a offset.
*/
class ACE_Export ACE_WIN32_Asynch_Write_File_Result : public virtual ACE_Asynch_Write_File_Result_Impl,
public ACE_WIN32_Asynch_Write_Stream_Result
{
/// Factory class will have special permission.
friend class ACE_WIN32_Asynch_Write_File;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
// = Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
// The following methods belong to
// ACE_WIN32_Asynch_Read_Stream_Result. They are here to avoid VC++
// warnings. These methods route their call to the
// ACE_WIN32_Asynch_Read_Stream_Result base class.
/// The number of bytes which were requested at the start of the
/// asynchronous write.
size_t bytes_to_write (void) const;
/// Message block that contains the data to be written.
ACE_Message_Block &message_block (void) const;
/// I/O handle used for writing.
ACE_HANDLE handle (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Write_File factory.
ACE_WIN32_Asynch_Write_File_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
size_t bytes_to_write,
const void* act,
u_long offset,
u_long offset_high,
ACE_HANDLE event,
int priority,
int signal_number = 0,
int gather_enabled = 0);
/// ACE_Proactor will call this method when the write completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Write_File_Result (void);
};
/**
* @class ACE_WIN32_Asynch_Write_File
*
* @brief This class is a factory for starting off asynchronous writes
* on a file.
*
* Once <open> is called, multiple asynchronous <write>s can be
* started using this class. A ACE_Asynch_Write_File::Result
* will be passed back to the @a handler when the asynchronous
* writes completes through the <ACE_Handler::handle_write_file>
* callback.
*/
class ACE_Export ACE_WIN32_Asynch_Write_File : public virtual ACE_Asynch_Write_File_Impl,
public ACE_WIN32_Asynch_Write_Stream
{
public:
/// Constructor.
ACE_WIN32_Asynch_Write_File (ACE_WIN32_Proactor *win32_proactor);
/**
* This starts off an asynchronous write. Upto @a bytes_to_write
* will be write and stored in the @a message_block. The write will
* start at @a offset from the beginning of the file.
*/
int write (ACE_Message_Block &message_block,
size_t bytes_to_write,
u_long offset,
u_long offset_high,
const void *act,
int priority,
int signal_number = 0);
/**
* Same as above but with gather support, through chaining of
* composite message blocks using the continuation field.
* @note Each data block payload must be at least the size of a
* system memory page and must be aligned on a system memory page
* size boundary
*/
int writev (ACE_Message_Block &message_block,
size_t bytes_to_write,
u_long offset,
u_long offset_high,
const void *act,
int priority,
int signal_number = 0);
/// Destrcutor.
virtual ~ACE_WIN32_Asynch_Write_File (void);
// = Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
private:
/**
* This method belongs to ACE_WIN32_Asynch_Write_Stream. It is here
* to avoid compiler warnings. This method is forwarded to the
* ACE_WIN32_Asynch_Write_Stream class.
*/
int write (ACE_Message_Block &message_block,
size_t bytes_to_write,
const void *act,
int priority,
int signal_number = 0);
/**
* Same as above but with gather support, through chaining of composite
* message blocks using the continuation field.
*/
int writev (ACE_Message_Block &message_block,
size_t bytes_to_write,
const void *act,
int priority,
int signal_number = 0);
};
/**
* @class ACE_WIN32_Asynch_Accept_Result
*
* @brief This class implements ACE_Asynch_Accept::Result for WIN32
* platform.
*
* This class has all the information necessary for the
* @a handler to uniquiely identify the completion of the
* asynchronous accept.
*/
class ACE_Export ACE_WIN32_Asynch_Accept_Result : public virtual ACE_Asynch_Accept_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory will have special permission.
friend class ACE_WIN32_Asynch_Accept;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// The number of bytes which were requested at the start of the
/// asynchronous accept.
size_t bytes_to_read (void) const;
/// Message block which contains the read data.
ACE_Message_Block &message_block (void) const;
/// I/O handle used for accepting new connections.
ACE_HANDLE listen_handle (void) const;
/// I/O handle for the new connection.
ACE_HANDLE accept_handle (void) const;
// = Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Accept factory.
ACE_WIN32_Asynch_Accept_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE listen_handle,
ACE_HANDLE accept_handle,
ACE_Message_Block &message_block,
size_t bytes_to_read,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
/// ACE_Proactor will call this method when the accept completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Accept_Result (void);
/// Bytes requested when the asynchronous read was initiated.
size_t bytes_to_read_;
/// Message block for reading the data into.
ACE_Message_Block &message_block_;
/// I/O handle used for accepting new connections.
ACE_HANDLE listen_handle_;
/// I/O handle for the new connection.
ACE_HANDLE accept_handle_;
};
/**
* @class ACE_WIN32_Asynch_Accept
*
* @brief This class is a factory for starting off asynchronous accepts
* on a listen handle.
*
* Once <open> is called, multiple asynchronous <accept>s can
* started using this class. A ACE_Asynch_Accept::Result will
* be passed back to the @a handler when the asynchronous accept
* completes through the <ACE_Handler::handle_accept>
* callback.
*/
class ACE_Export ACE_WIN32_Asynch_Accept : public virtual ACE_Asynch_Accept_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Accept (ACE_WIN32_Proactor *win32_proactor);
/**
* This starts off an asynchronous accept. The asynchronous accept
* call also allows any initial data to be returned to the
* @a handler. Upto @a bytes_to_read will be read and stored in the
* @a message_block. The <accept_handle> will be used for the
* <accept> call. If (<accept_handle> == INVALID_HANDLE), a new
* handle will be created.
*
* @a message_block must be specified. This is because the address of
* the new connection is placed at the end of this buffer.
*/
int accept (ACE_Message_Block &message_block,
size_t bytes_to_read,
ACE_HANDLE accept_handle,
const void *act,
int priority,
int signal_number = 0,
int addr_family = AF_INET);
/// Destructor.
~ACE_WIN32_Asynch_Accept (void);
// Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
};
/**
* @class ACE_WIN32_Asynch_Connect_Result
*
* @brief This is that class which will be passed back to the
* completion handler when the asynchronous connect completes.
*
* This class has all the information necessary for the
* completion handler to uniquiely identify the completion of the
* asynchronous connect.
*/
class ACE_Export ACE_WIN32_Asynch_Connect_Result : public virtual ACE_Asynch_Connect_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory classes will have special permissions.
friend class ACE_WIN32_Asynch_Connect;
/// The Proactor constructs the Result class for faking results.
friend class ACE_WIN32_Proactor;
public:
/// I/O handle for the connection.
ACE_HANDLE connect_handle (void) const;
// = Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* Returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post this object to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Connect factory.
ACE_WIN32_Asynch_Connect_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE connect_handle,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number);
/// ACE_Proactor will call this method when the accept completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Connect_Result (void);
/// Set the I/O handle for the new connection.
void connect_handle (ACE_HANDLE handle);
ACE_HANDLE connect_handle_;
};
/**
* @class ACE_WIN32_Asynch_Connect
*/
class ACE_Export ACE_WIN32_Asynch_Connect :
public virtual ACE_Asynch_Connect_Impl,
public ACE_WIN32_Asynch_Operation,
public ACE_Event_Handler
{
public:
/// Constructor.
ACE_WIN32_Asynch_Connect (ACE_WIN32_Proactor * win32_proactor);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Connect (void);
/**
* This open belongs to ACE_WIN32_Asynch_Operation. We forward
* this call to that method. We have put this here to avoid the
* compiler warnings.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor = 0);
/**
* Start an asynchronous connect.
*
* @param connect_handle Handle to use for the connect. If the value
* ACE_INVALID_HANDLE, a new handle will be created.
*
* @retval 0 Success
* @retval -1 Error
*/
int connect (ACE_HANDLE connect_handle,
const ACE_Addr &remote_sap,
const ACE_Addr &local_sap,
int reuse_addr,
const void *act,
int priority,
int signal_number = 0);
/**
* Cancel all pending pseudo-asynchronus requests
* Behavior as usual AIO request
*/
int cancel (void);
/**
* Close performs cancellation of all pending requests
* and close the connect handle
*/
int close (void);
/// Virtual from ACE_Event_Handler
ACE_HANDLE get_handle (void) const;
/// Virtual from ACE_Event_Handler
void set_handle (ACE_HANDLE handle);
/// Virtual from ACE_Event_Handler
int handle_input ( ACE_HANDLE handle);
int handle_output ( ACE_HANDLE handle);
int handle_exception ( ACE_HANDLE handle);
/// Virtual from ACE_Event_Handler
int handle_close (ACE_HANDLE handle, ACE_Reactor_Mask close_mask) ;
// = Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid dominace warnings. They route
// the call to the ACE_WIN32_Asynch_Operation base class.
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
private:
int connect_i (ACE_WIN32_Asynch_Connect_Result *result,
const ACE_Addr &remote_sap,
const ACE_Addr &local_sap,
int reuse_addr);
int post_result (ACE_WIN32_Asynch_Connect_Result *result, bool flg_post);
/// Cancel uncompleted connect operations.
/**
* @param flg_notify Indicates whether or not to send notification about
* canceled connect operations. If false, don't send
* notifications. If true, notify user about canceled
* connects.
* According WIN32 standards we should receive
* notifications on canceled AIO requests.
*
* @param set Receives the set of I/O handles on which asynchronous
* connect requests were canceled as a result of this
* method. The contents of @a set are completely
* replaced.
*/
int cancel_uncompleted (bool flg_notify, ACE_Handle_Set &set);
/// true - Connect is registered in ACE_Asynch_Pseudo_Task
/// false - Accept is deregisted in ACE_Asynch_Pseudo_Task
bool flg_open_ ;
typedef ACE_Map_Manager<ACE_HANDLE, ACE_WIN32_Asynch_Connect_Result *, ACE_SYNCH_NULL_MUTEX>
MAP_MANAGER;
/// Map of Result pointers that correspond to all the <accept>'s
/// pending.
MAP_MANAGER result_map_;
/// The lock to protect the result map which is shared. The queue
/// is updated by main thread in the register function call and
/// through the auxillary thread in the asynch pseudo task.
ACE_SYNCH_MUTEX lock_;
};
/**
* @class ACE_WIN32_Asynch_Transmit_File_Result
*
*
* @brief This class implements ACE_Asynch_Transmit_File::Result for
* WIN32 platforms.
*
* This class has all the information necessary for the
* @a handler to uniquiely identify the completion of the
* asynchronous transmit file.
*/
class ACE_Export ACE_WIN32_Asynch_Transmit_File_Result : public virtual ACE_Asynch_Transmit_File_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory class will have special permission.
friend class ACE_WIN32_Asynch_Transmit_File;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// Socket used for transmitting the file.
ACE_HANDLE socket (void) const;
/// File from which the data is read.
ACE_HANDLE file (void) const;
/// Header and trailer data associated with this transmit file.
ACE_Asynch_Transmit_File::Header_And_Trailer *header_and_trailer (void) const;
/// The number of bytes which were requested at the start of the
/// asynchronous transmit file.
size_t bytes_to_write (void) const;
/// Number of bytes per send requested at the start of the transmit
/// file.
size_t bytes_per_send (void) const;
/// Flags which were passed into transmit file.
u_long flags (void) const;
// Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Transmit_File factory.
ACE_WIN32_Asynch_Transmit_File_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE socket,
ACE_HANDLE file,
ACE_Asynch_Transmit_File::Header_And_Trailer *header_and_trailer,
size_t bytes_to_write,
u_long offset,
u_long offset_high,
size_t bytes_per_send,
u_long flags,
const void *act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
/// Proactor will call this method when the write completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Transmit_File_Result (void);
/// Network I/O handle.
ACE_HANDLE socket_;
/// File I/O handle.
ACE_HANDLE file_;
/// Header and trailer data associated with this transmit file.
ACE_Asynch_Transmit_File::Header_And_Trailer *header_and_trailer_;
/// The number of bytes which were requested at the start of the
/// asynchronous transmit file.
size_t bytes_to_write_;
/// Number of bytes per send requested at the start of the transmit
/// file.
size_t bytes_per_send_;
/// Flags which were passed into transmit file.
u_long flags_;
};
/**
* @class ACE_WIN32_Asynch_Transmit_File
*
* @brief This class is a factory for starting off asynchronous
* transmit files on a stream.
*
* Once <open> is called, multiple asynchronous <transmit_file>s
* can started using this class. A
* ACE_Asynch_Transmit_File::Result will be passed back to the
* @a handler when the asynchronous transmit file completes
* through the <ACE_Handler::handle_transmit_file> callback.
*
* The transmit_file function transmits file data over a
* connected network connection. The function uses the operating
* system's cache manager to retrieve the file data. This
* function provides high-performance file data transfer over
* network connections. This function would be of great use in
* a Web Server, Image Server, etc.
*/
class ACE_Export ACE_WIN32_Asynch_Transmit_File : public virtual ACE_Asynch_Transmit_File_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Transmit_File (ACE_WIN32_Proactor *win32_proactor);
/**
* This starts off an asynchronous transmit file. The <file> is a
* handle to an open file. <header_and_trailer> is a pointer to a
* data structure that contains pointers to data to send before and
* after the file data is sent. Set this parameter to 0 if you only
* want to transmit the file data. Upto @a bytes_to_write will be
* written to the <socket>. If you want to send the entire file,
* let @a bytes_to_write = 0. @a bytes_per_send is the size of each
* block of data sent per send operation. Please read the Win32
* documentation on what the flags should be.
*/
int transmit_file (ACE_HANDLE file,
ACE_Asynch_Transmit_File::Header_And_Trailer *header_and_trailer,
size_t bytes_to_write,
u_long offset,
u_long offset_high,
size_t bytes_per_send,
u_long flags,
const void *act,
int priority,
int signal_number = 0);
/// Destructor.
~ACE_WIN32_Asynch_Transmit_File (void);
// Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
};
/**
* @class ACE_WIN32_Asynch_Read_Dgram_Result
*
* @brief This class provides concrete implementation for
* ACE_Asynch_Read_Dgram::Result class.
*/
class ACE_Export ACE_WIN32_Asynch_Read_Dgram_Result : public virtual ACE_Asynch_Read_Dgram_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory class will have special permissions.
friend class ACE_WIN32_Asynch_Read_Dgram;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// The number of bytes which were requested at the start of the
/// asynchronous read.
size_t bytes_to_read (void) const;
/// Message block which contains the read data
ACE_Message_Block *message_block (void) const;
/// The address of where the packet came from
int remote_address (ACE_Addr& addr) const;
sockaddr *saddr () const;
/// The flags used in the read
int flags (void) const;
/// I/O handle used for reading.
ACE_HANDLE handle (void) const;
// Base class operations. These operations are here to kill
// dominance warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Read_Dgram factory.
ACE_WIN32_Asynch_Read_Dgram_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block *message_block,
size_t bytes_to_read,
int flags,
int protocol_family,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
/// Proactor will call this method when the read completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_Dgram_Result (void);
/// Bytes requested when the asynchronous read was initiated.
size_t bytes_to_read_;
/// Message block for reading the data into.
ACE_Message_Block *message_block_;
/// The address of where the packet came from
ACE_Addr *remote_address_;
int addr_len_;
/// The flags used in the read
int flags_;
/// I/O handle used for reading.
ACE_HANDLE handle_;
};
/**
* @class ACE_WIN32_Asynch_Read_Dgram
*
* @brief This class is a factory for starting off asynchronous reads
* on a UDP socket.
*
* Once <open> is called, multiple asynchronous <read>s can be
* started using this class. An ACE_Asynch_Read_Dgram::Result
* will be passed back to the @a handler when the asynchronous
* reads completes through the <ACE_Handler::handle_read_stream>
* callback.
*
*/
class ACE_Export ACE_WIN32_Asynch_Read_Dgram : public virtual ACE_Asynch_Read_Dgram_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Read_Dgram (ACE_WIN32_Proactor *win32_proactor);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Read_Dgram (void);
/** This starts off an asynchronous read. Upto
* <message_block->total_size()> will be read and stored in the
* @a message_block. @a message_block's <wr_ptr> will be updated to reflect
* the added bytes if the read operation is successfully completed.
* Return code of 1 means immediate success and <number_of_bytes_recvd>
* will contain number of bytes read. The <ACE_Handler::handle_read_dgram>
* method will still be called. Return code of 0 means the IO will
* complete proactively. Return code of -1 means there was an error, use
* errno to get the error code.
*
* Scatter/gather is supported on WIN32 by using the <message_block->cont()>
* method. Up to ACE_IOV_MAX @a message_block's are supported. Upto
* <message_block->size()> bytes will be read into each <message block> for
* a total of <message_block->total_size()> bytes. All @a message_block's
* <wr_ptr>'s will be updated to reflect the added bytes for each
* @a message_block
*/
virtual ssize_t recv (ACE_Message_Block *message_block,
size_t &number_of_bytes_recvd,
int flags,
int protocol_family,
const void *act,
int priority,
int signal_number);
// Methods belong to ACE_WIN32_Asynch_Operation base class. These
// methods are defined here to avoid VC++ warnings. They route the
// call to the ACE_WIN32_Asynch_Operation base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
protected:
/// Do-nothing constructor.
ACE_WIN32_Asynch_Read_Dgram (void);
};
/**
* @class ACE_WIN32_Asynch_Write_Dgram_Result
*
* @brief This class provides concrete implementation for
* ACE_Asynch_Write_Dgram::Result class.
*/
class ACE_Export ACE_WIN32_Asynch_Write_Dgram_Result : public virtual ACE_Asynch_Write_Dgram_Result_Impl,
public ACE_WIN32_Asynch_Result
{
/// Factory class willl have special permissions.
friend class ACE_WIN32_Asynch_Write_Dgram;
/// Proactor class has special permission.
friend class ACE_WIN32_Proactor;
public:
/// The number of bytes which were requested at the start of the
/// asynchronous write.
size_t bytes_to_write (void) const;
/// Message block which contains the sent data
ACE_Message_Block *message_block (void) const;
/// The flags using in the write
int flags (void) const;
/// I/O handle used for writing.
ACE_HANDLE handle (void) const;
// = Base class operations. These operations are here to kill some
// warnings. These methods call the base class methods.
/// Number of bytes transferred by the operation.
size_t bytes_transferred (void) const;
/// ACT associated with the operation.
const void *act (void) const;
/// Did the operation succeed?
int success (void) const;
/**
* This returns the ACT associated with the handle when it was
* registered with the I/O completion port. This ACT is not the
* same as the ACT associated with the asynchronous operation.
*/
const void *completion_key (void) const;
/// Error value if the operation fail.
u_long error (void) const;
/// Event associated with the OVERLAPPED structure.
ACE_HANDLE event (void) const;
/// This really make sense only when doing file I/O.
u_long offset (void) const;
/// Offset_high associated with the OVERLAPPED structure.
u_long offset_high (void) const;
/// The priority of the asynchronous operation. Currently, this is
/// not supported on Win32.
int priority (void) const;
/// No-op. Returns 0.
int signal_number (void) const;
/// Post @c this to the Proactor's completion port.
int post_completion (ACE_Proactor_Impl *proactor);
protected:
/// Constructor is protected since creation is limited to
/// ACE_Asynch_Write_Stream factory.
ACE_WIN32_Asynch_Write_Dgram_Result (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
ACE_Message_Block *message_block,
size_t bytes_to_write,
int flags,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
/// ACE_Proactor will call this method when the write completes.
virtual void complete (size_t bytes_transferred,
int success,
const void *completion_key,
u_long error);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Write_Dgram_Result (void);
/// The number of bytes which were requested at the start of the
/// asynchronous write.
size_t bytes_to_write_;
/// Message block used for the send.
ACE_Message_Block *message_block_;
/// The flags using in the write
int flags_;
/// I/O handle used for writing.
ACE_HANDLE handle_;
};
/**
* @class ACE_WIN32_Asynch_Write_Dgram
*
* @brief This class is a factory for starting off asynchronous writes
* on a UDP socket.
*
*
* Once <open> is called, multiple asynchronous <writes>s can
* started using this class. A ACE_Asynch_Write_Stream::Result
* will be passed back to the @a handler when the asynchronous
* write completes through the
* <ACE_Handler::handle_write_stream> callback.
*/
class ACE_Export ACE_WIN32_Asynch_Write_Dgram : public virtual ACE_Asynch_Write_Dgram_Impl,
public ACE_WIN32_Asynch_Operation
{
public:
/// Constructor.
ACE_WIN32_Asynch_Write_Dgram (ACE_WIN32_Proactor *win32_proactor);
/// Destructor.
virtual ~ACE_WIN32_Asynch_Write_Dgram (void);
/** This starts off an asynchronous send. Upto
* <message_block->total_length()> will be sent. @a message_block's
* <rd_ptr> will be updated to reflect the sent bytes if the send operation
* is successfully completed.
* Return code of 1 means immediate success and <number_of_bytes_sent>
* is updated to number of bytes sent. The <ACE_Handler::handle_write_dgram>
* method will still be called. Return code of 0 means the IO will
* complete proactively. Return code of -1 means there was an error, use
* errno to get the error code.
*
* Scatter/gather is supported on WIN32 by using the <message_block->cont()>
* method. Up to ACE_IOV_MAX @a message_block's are supported. Upto
* <message_block->length()> bytes will be sent from each <message block>
* for a total of <message_block->total_length()> bytes. All
* @a message_block's <rd_ptr>'s will be updated to reflect the bytes sent
* from each @a message_block.
*/
virtual ssize_t send (ACE_Message_Block *message_block,
size_t &number_of_bytes_sent,
int flags,
const ACE_Addr &addr,
const void *act,
int priority,
int signal_number);
// = Methods belonging to <ACE_WIN32_Asynch_Operation> base class.
// These methods are defined here to avoid VC++ warnings. They route
// the call to the <ACE_WIN32_Asynch_Operation> base class.
/**
* 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 @a handler to get the
* correct handle.
*/
int open (const ACE_Handler::Proxy_Ptr &handler_proxy,
ACE_HANDLE handle,
const void *completion_key,
ACE_Proactor *proactor);
/**
* This cancels all pending accepts operations that were issued by
* the calling thread. The function does not cancel asynchronous
* operations issued by other threads.
*/
int cancel (void);
/// Return the underlying proactor.
ACE_Proactor* proactor (void) const;
protected:
/// Do-nothing constructor.
ACE_WIN32_Asynch_Write_Dgram (void);
};
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* ACE_HAS_WIN32_OVERLAPPED_IO && ACE_HAS_WINSOCK2 */
#include /**/ "ace/post.h"
#endif /* ACE_WIN32_ASYNCH_IO_H */
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