ACE  6.3.3
Public Member Functions | Protected Attributes | Private Member Functions | List of all members
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>

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Public Member Functions

 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 Member Functions

ssize_t send (...)
 
ssize_t recv (...)
 
ssize_t send_n (...)
 
ssize_t recv_n (...)
 

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.

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 initialize 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;

Member Function Documentation

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

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

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

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)
inlinevirtual
template<class STREAM >
virtual int ACE_IOStream< STREAM >::ipfx0 ( void  )
inlinevirtual
template<class STREAM >
virtual int ACE_IOStream< STREAM >::ipfx1 ( void  )
inlinevirtual
template<class STREAM >
virtual void ACE_IOStream< STREAM >::isfx ( void  )
inlinevirtual
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  )
inlinevirtual
template<class STREAM >
virtual void ACE_IOStream< STREAM >::osfx ( void  )
inlinevirtual
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

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.


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