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116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
// -*- C++ -*-
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//=============================================================================
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/**
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* @file MEM_Stream.h
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*
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* $Id: MEM_Stream.h 92069 2010-09-28 11:38:59Z johnnyw $
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*
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* @author Nanbor Wang <nanbor@cs.wustl.edu>
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*/
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//=============================================================================
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#ifndef ACE_MEM_STREAM_H
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#define ACE_MEM_STREAM_H
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#include /**/ "ace/pre.h"
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#include "ace/MEM_IO.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#if (ACE_HAS_POSITION_INDEPENDENT_POINTERS == 1)
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#include "ace/INET_Addr.h"
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#if !defined (ACE_MEM_STREAM_MIN_BUFFER)
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# define ACE_MEM_STREAM_MIN_BUFFER 4096
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#endif /* ACE_MEM_STREAM_MIN_BUFFER */
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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class ACE_MEM_Acceptor;
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class ACE_MEM_Connector;
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/**
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* @class ACE_MEM_Stream
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*
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* @brief Defines the methods in the ACE_MEM_Stream abstraction.
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*
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* This adds additional wrapper methods atop the ACE_MEM_IO
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* class. Notice that ACE_MEM_Stream can only send messages no bigger
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* than the underlying MMAP file size minus sizeof (ACE_MEM_SAP_Node).
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* The size of the MMAP file is default to ACE_MEM_STREAM_MIN_BUFFER.
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* (Define above in this file, to 4096 bytes.)
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* If you need to increase the size of allowable message
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* ACE_MEM_Stream can handle, you can set it to either
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* @c ACE_MEM_Acceptor::malloc_options(). minimal_bytes_
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* @c ACE_MEM_Acceptor::init_buffer_size (size_t size);
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* before establishing a connection.
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*/
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class ACE_Export ACE_MEM_Stream : public ACE_MEM_IO
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{
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public:
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friend class ACE_MEM_Acceptor;
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friend class ACE_MEM_Connector;
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// Initialization and termination methods.
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/// Constructor.
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ACE_MEM_Stream (void);
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/// Constructor (sets the underlying ACE_HANDLE with <h>).
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ACE_MEM_Stream (ACE_HANDLE h);
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/// Destructor.
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~ACE_MEM_Stream (void);
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//= The following two methods use write and read system calls.
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/// Send n bytes, keep trying until n are sent.
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/// Recv n bytes, keep trying until n are received.
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ssize_t send_n (const void *buf, size_t n);
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ssize_t recv_n (void *buf, size_t n);
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// = The following two methods use the send and recv system calls.
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/// Send n bytes, keep trying until n are sent.
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/// Recv n bytes, keep trying until n are received.
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ssize_t send_n (const void *buf, size_t n, int flags);
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ssize_t recv_n (void *buf, size_t n, int flags);
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// = Selectively close endpoints.
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/// Close down the reader.
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int close_reader (void);
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/// Close down the writer.
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int close_writer (void);
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/**
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* Close down the socket (we need this to make things work correctly
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* on Win32, which requires use to do a <close_writer> before doing
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* the close to avoid losing data).
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*/
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int close (void);
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// = Meta-type info
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typedef ACE_Addr PEER_ADDR;
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/// Dump the state of an object.
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void dump (void) const;
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/// Declare the dynamic allocation hooks.
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ACE_ALLOC_HOOK_DECLARE;
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#if defined (__ACE_INLINE__)
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#include "ace/MEM_Stream.inl"
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#endif /* __ACE_INLINE__ */
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#endif /* ACE_HAS_POSITION_INDEPENDENT_POINTERS == 1 */
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#include /**/ "ace/post.h"
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#endif /* ACE_MEM_STREAM_H */
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