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ACE_IOStream< STREAM > Class Template Reference

A template adapter for creating an iostream-like object using an ACE IPC Stream for the actual I/O. Iostreams use an underlying streambuf object for the IO interface. The iostream class and derivatives provide you with a host of convenient operators that access the streambuf. More...

#include <IOStream_T.h>

List of all members.

Public Methods
	ACE_IOStream (STREAM &stream, u_int streambuf_size=ACE_STREAMBUF_SIZE)
	ACE_IOStream (u_int streambuf_size=ACE_STREAMBUF_SIZE)
virtual	~ACE_IOStream (void)
virtual int	close (void)
int	eof (void) const
virtual int	ipfx0 (void)
virtual int	ipfx1 (void)
virtual int	ipfx (int need=0)
virtual void	isfx (void)
virtual int	opfx (void)
virtual void	osfx (void)
ACE_IOStream< STREAM > &	operator>> (ACE_Time_Value *&tv)
Protected Attributes
ACE_Streambuf_T< STREAM > *	streambuf_
Private Methods
ssize_t	send (...)
ssize_t	recv (...)
ssize_t	send_n (...)
ssize_t	recv_n (...)

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Detailed Description

template<class STREAM>
class ACE_IOStream< STREAM >

A template adapter for creating an iostream-like object using an ACE IPC Stream for the actual I/O. Iostreams use an underlying streambuf object for the IO interface. The iostream class and derivatives provide you with a host of convenient operators that access the streambuf.

We inherit all characteristics of iostream and your <STREAM> class. When you create a new class from this template, you can use it anywhere you would have used your original <STREAM> class. To create an iostream for your favorite ACE IPC class (e.g., <ACE_SOCK_Stream>), feed that class to this template's <STREAM> parameter, e.g., typedef ACE_Svc_Handler<ACE_SOCK_iostream, ACE_INET_Addr, ACE_NULL_SYNCH> Service_Handler; Because the operators in the iostream class are not virtual, you cannot easily provide overloads in your custom ACE_IOStream classes. To make these things work correctly, you need to overload ALL operators of the ACE_IOStream you create. I've attempted to do that here to make things easier for you but there are no guarantees. In the iostream.cpp file is an example of why it is necessary to overload all of the get/put operators when you want to customize only one or two.

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Constructor & Destructor Documentation

template<class STREAM> ACE_IOStream< STREAM >::ACE_IOStream (  STREAM &    stream, u_int    streambuf_size = ACE_STREAMBUF_SIZE )

template<class STREAM> ACE_IOStream< STREAM >::ACE_IOStream (  u_int    streambuf_size = ACE_STREAMBUF_SIZE )

The default constructor. This will initiailze your STREAM and then setup the iostream baseclass to use a custom streambuf based on STREAM.

template<class STREAM> ACE_IOStream< STREAM >::~ACE_IOStream (  void    )  [virtual]

We have to get rid of the <streambuf_> ourselves since we gave it to the <iostream> base class;

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Member Function Documentation

template<class STREAM> int ACE_IOStream< STREAM >::close (  void    )  [virtual]

The only ambituity in the multiple inheritance is the <close> function.

template<class STREAM> ACE_INLINE int ACE_IOStream< STREAM >::eof (  void    )  const

Returns 1 if we're at the end of the <STREAM>, i.e., if the connection has closed down or an error has occurred, else 0. Under the covers, <eof> calls the streambuf's <timeout> function which will reset the timeout flag. As as result, you should save the return of <eof> and check it instead of calling <eof> successively.

template<class STREAM> virtual int ACE_IOStream< STREAM >::ipfx (  int    need = 0 )  [inline, virtual]

template<class STREAM> virtual int ACE_IOStream< STREAM >::ipfx0 (  void    )  [inline, virtual]

template<class STREAM> virtual int ACE_IOStream< STREAM >::ipfx1 (  void    )  [inline, virtual]

template<class STREAM> virtual void ACE_IOStream< STREAM >::isfx (  void    )  [inline, virtual]

template<class STREAM> ACE_IOStream< STREAM > & ACE_IOStream< STREAM >::operator>> (  ACE_Time_Value *&    tv )

Allow the programmer to provide a timeout for read operations. Give it a pointer to NULL to block forever.

template<class STREAM> virtual int ACE_IOStream< STREAM >::opfx (  void    )  [inline, virtual]

template<class STREAM> virtual void ACE_IOStream< STREAM >::osfx (  void    )  [inline, virtual]

template<class STREAM> ssize_t ACE_IOStream< STREAM >::recv (  ...    )  [private]

template<class STREAM> ssize_t ACE_IOStream< STREAM >::recv_n (  ...    )  [private]

template<class STREAM> ssize_t ACE_IOStream< STREAM >::send (  ...    )  [private]

template<class STREAM> ssize_t ACE_IOStream< STREAM >::send_n (  ...    )  [private]

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Member Data Documentation

template<class STREAM> ACE_Streambuf_T<STREAM>* ACE_IOStream< STREAM >::streambuf_ [protected]

This is where all of the action takes place. The streambuf_ is the interface to the underlying STREAM.

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

• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/IOStream_T.h
• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/IOStream_T.cpp
• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/IOStream_T.i

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