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ACE_UPIPE_Stream Class Reference

Defines the method that transfer data on a UPIPE. More...

#include <UPIPE_Stream.h>

Inheritance diagram for ACE_UPIPE_Stream:

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Collaboration diagram for ACE_UPIPE_Stream:

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List of all members.

Public Types

typedef ACE_Stream< ACE_SYNCH > MT_Stream
typedef ACE_UPIPE_Addr PEER_ADDR

Public Member Functions

 ACE_UPIPE_Stream (void)
virtual ~ACE_UPIPE_Stream (void)
int close (void)
 Shut down the UPIPE and release resources.

ACE_HANDLE get_handle (void) const
 Return the underlying I/O handle.

int send (ACE_Message_Block *mb_p, ACE_Time_Value *timeout=0)
int recv (ACE_Message_Block *&mb_p, ACE_Time_Value *timeout=0)
ssize_t send (const char *buffer, size_t n, ACE_Time_Value *timeout=0)
ssize_t recv (char *buffer, size_t n, ACE_Time_Value *timeout=0)
ssize_t send_n (const char *buffer, size_t n, ACE_Time_Value *timeout=0)
ssize_t recv_n (char *buffer, size_t n, ACE_Time_Value *timeout=0)
int control (int cmd, void *val) const
 Perform control operations on the UPIPE_Stream.

int get_remote_addr (ACE_UPIPE_Addr &remote_sap) const
 Return the remote address we are connected to.

void dump (void) const
 Dump the state of an object.


Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks.


Private Attributes

ACE_Message_Block * mb_last_
ACE_UPIPE_Addr remote_addr_
 Address of who we are connected to.

MT_Stream stream_
int reference_count_

Friends

class ACE_UPIPE_Acceptor
class ACE_UPIPE_Connector

Detailed Description

Defines the method that transfer data on a UPIPE.

Definition at line 38 of file UPIPE_Stream.h.

Member Typedef Documentation

typedef ACE_Stream<ACE_SYNCH> ACE_UPIPE_Stream::MT_Stream
 

Definition at line 44 of file UPIPE_Stream.h.

typedef ACE_UPIPE_Addr ACE_UPIPE_Stream::PEER_ADDR
 

Definition at line 107 of file UPIPE_Stream.h.

Constructor & Destructor Documentation

ACE_BEGIN_VERSIONED_NAMESPACE_DECL ACE_UPIPE_Stream::ACE_UPIPE_Stream (  void   ) 
 

Definition at line 19 of file UPIPE_Stream.cpp.

References ACE_TRACE. 

00020   : mb_last_ (0),
00021     reference_count_ (0)
00022 {
00023   ACE_TRACE ("ACE_UPIPE_Stream::ACE_UPIPE_STREAM");
00024 }

ACE_UPIPE_Stream::~ACE_UPIPE_Stream (  void   )  [virtual]
 

Definition at line 26 of file UPIPE_Stream.cpp.

References mb_last_, and ACE_Message_Block::release(). 

00027 {
00028   if (this->mb_last_ != 0)
00029     {
00030       this->mb_last_->release ();
00031       this->mb_last_ = 0;
00032     }
00033 }

Member Function Documentation

int ACE_UPIPE_Stream::close (  void   ) 
 

Shut down the UPIPE and release resources.

Reimplemented from ACE_SPIPE.

Definition at line 54 of file UPIPE_Stream.cpp.

References ACE_GUARD_RETURN, ACE_TRACE, ACE_Stream<>::close(), ACE_SPIPE::close(), and ACE_IPC_SAP::get_handle(). 

00055 {
00056   ACE_TRACE ("ACE_UPIPE_Stream::close");
00057   ACE_MT (ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1));
00058 
00059   this->reference_count_--;
00060 
00061   if (this->reference_count_ == 0)
00062     {
00063       // Since the UPIPE should have been closed earlier we won't bother
00064       // checking to see if closing it now fails.
00065 
00066       if (this->ACE_SPIPE::get_handle () != ACE_INVALID_HANDLE)
00067         this->ACE_SPIPE::close ();
00068 
00069       // Close down the ACE_stream.
00070       return this->stream_.close ();
00071     }
00072   return 0;
00073 }

int ACE_UPIPE_Stream::control (  int  cmd,
void *  val
)  const
 

Perform control operations on the UPIPE_Stream.

Reimplemented from ACE_IPC_SAP.

Definition at line 36 of file UPIPE_Stream.cpp.

References ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds, and ACE_TRACE. 

00038 {
00039   ACE_TRACE ("ACE_UPIPE_Stream::control");
00040 
00041   return ((ACE_UPIPE_Stream *) this)->stream_.control
00042     ((ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds) cmd, val);
00043 }

void ACE_UPIPE_Stream::dump (  void   )  const
 

Dump the state of an object.

Reimplemented from ACE_SPIPE.

Definition at line 46 of file UPIPE_Stream.cpp.

References ACE_TRACE. 

00047 {
00048 #if defined (ACE_HAS_DUMP)
00049   ACE_TRACE ("ACE_UPIPE_Stream::dump");
00050 #endif /* ACE_HAS_DUMP */
00051 }

ACE_BEGIN_VERSIONED_NAMESPACE_DECL ACE_INLINE ACE_HANDLE ACE_UPIPE_Stream::get_handle (  void   )  const
 

Return the underlying I/O handle.

Reimplemented from ACE_IPC_SAP.

Definition at line 8 of file UPIPE_Stream.inl.

References ACE_TRACE, and ACE_IPC_SAP::get_handle().

Referenced by ACE_UPIPE_Acceptor::accept(), and ACE_UPIPE_Connector::connect(). 

00009 {
00010   ACE_TRACE ("ACE_UPIPE_Stream::get_handle");
00011   return this->ACE_SPIPE::get_handle ();
00012 }

int ACE_UPIPE_Stream::get_remote_addr (  ACE_UPIPE_Addr &  remote_sap  )  const
 

Return the remote address we are connected to.

Definition at line 76 of file UPIPE_Stream.cpp.

References ACE_TRACE. 

00077 {
00078   ACE_TRACE ("ACE_UPIPE_Stream::get_remote_addr");
00079   remote_sap = this->remote_addr_;
00080   return 0;
00081 }

ssize_t ACE_UPIPE_Stream::recv (  char *  buffer,
size_t  n,
ACE_Time_Value *  timeout = 0
) 
 

Recv a buffer of upto n bytes from the message queue. Returns -1 on error, else number of bytes read.

Definition at line 120 of file UPIPE_Stream.cpp.

References ACE_TRACE, EWOULDBLOCK, ACE_Stream<>::get(), ACE_Message_Block::length(), mb_last_, ACE_OS::memcpy(), ACE_Message_Block::rd_ptr(), and ACE_Message_Block::release(). 

00123 {
00124   ACE_TRACE ("ACE_UPIPE_Stream::recv");
00125   // Index in buffer.
00126   size_t bytes_read = 0;
00127 
00128   while (bytes_read < n)
00129     if (this->mb_last_ != 0)
00130       {
00131         // We have remaining data in our last read Message_Buffer.
00132         size_t this_len = this->mb_last_->length ();
00133         if (this_len < n)
00134           {
00135             // The remaining data is not enough.
00136 
00137             ACE_OS::memcpy ((void *) &buffer[bytes_read],
00138                             this->mb_last_->rd_ptr (),
00139                             this_len);
00140             bytes_read += this_len;
00141             this->mb_last_ = this->mb_last_->release ();   // mb_last_ now 0
00142             return bytes_read;
00143           }
00144         else
00145           {
00146             // The remaining data is at least enough.  If there's
00147             // more, we'll get it the next time through.
00148             ACE_OS::memcpy (&buffer[bytes_read],
00149                             this->mb_last_->rd_ptr (),
00150                             n);
00151             bytes_read += n;
00152 
00153             // Advance rd_ptr.
00154             this->mb_last_->rd_ptr (n);
00155 
00156             if (this->mb_last_->length () == 0)
00157               // Now the Message_Buffer is empty.
00158               this->mb_last_ = this->mb_last_->release ();
00159           }
00160       }
00161     else
00162       {
00163         // We have to get a new Message_Buffer from our stream.
00164         int result = this->stream_.get (this->mb_last_, timeout);
00165 
00166         if (result == -1)
00167           {
00168             if (errno == EWOULDBLOCK && bytes_read > 0)
00169               // Return the number of bytes read before we timed out.
00170               return bytes_read;
00171             else
00172               return -1;
00173           }
00174       }
00175 
00176   return bytes_read;
00177 }

int ACE_UPIPE_Stream::recv (  ACE_Message_Block *&  mb_p,
ACE_Time_Value *  timeout = 0
) 
 

Recv a message from the message queue. Returns -1 on error, else 0.

Definition at line 91 of file UPIPE_Stream.cpp.

References ACE_Stream<>::get().

Referenced by ACE_UPIPE_Connector::connect(), and recv_n(). 

00093 {
00094   return this->stream_.get (mb_p, timeout) == -1 ? -1 : 0;
00095 }

ssize_t ACE_UPIPE_Stream::recv_n (  char *  buffer,
size_t  n,
ACE_Time_Value *  timeout = 0
) 
 

Recv a buffer of exactly bytes from the message queue. Returns -1 on error, else the number of bytes read.

Definition at line 205 of file UPIPE_Stream.cpp.

References ACE_TRACE, recv(), and ssize_t. 

00208 {
00209   ACE_TRACE ("ACE_UPIPE_Stream::recv_n");
00210   size_t bytes_read;
00211   ssize_t len = 0;
00212 
00213   for (bytes_read = 0;
00214        bytes_read < n;
00215        bytes_read += len)
00216     {
00217       len = this->recv (buf + bytes_read,
00218                         n - bytes_read,
00219                         timeout);
00220       if (len == -1)
00221         return -1;
00222       else if (len == 0)
00223         break;
00224     }
00225 
00226   return bytes_read;
00227 }

ssize_t ACE_UPIPE_Stream::send (  const char *  buffer,
size_t  n,
ACE_Time_Value *  timeout = 0
) 
 

Send a buffer of n bytes through the message queue. Returns -1 on error, else number of bytes sent.

Definition at line 100 of file UPIPE_Stream.cpp.

References ACE_NEW_RETURN, ACE_TRACE, ACE_Message_Block::copy(), and ACE_Stream<>::put(). 

00103 {
00104   ACE_TRACE ("ACE_UPIPE_Stream::send");
00105 
00106   ACE_Message_Block *mb_p;
00107   ACE_NEW_RETURN (mb_p,
00108                   ACE_Message_Block (n),
00109                   -1);
00110   mb_p->copy (buffer, n);
00111   return
00112     this->stream_.put (mb_p, timeout) == -1
00113     ? -1
00114     : static_cast<ssize_t> (n);
00115 }

int ACE_UPIPE_Stream::send (  ACE_Message_Block *  mb_p,
ACE_Time_Value *  timeout = 0
) 
 

Send a message through the message queue. Returns -1 on error, else 0.

Definition at line 84 of file UPIPE_Stream.cpp.

References ACE_TRACE, and ACE_Stream<>::put().

Referenced by ACE_UPIPE_Acceptor::accept(), and send_n(). 

00086 {
00087   ACE_TRACE ("ACE_UPIPE_Stream::send_msg");
00088   return this->stream_.put (mb_p, timeout) == -1 ? -1 : 0;
00089 }

ssize_t ACE_UPIPE_Stream::send_n (  const char *  buffer,
size_t  n,
ACE_Time_Value *  timeout = 0
) 
 

Send a buffer of exactly n bytes to the message queue. Returns -1 on error, else number of bytes written (which should == n).

Definition at line 180 of file UPIPE_Stream.cpp.

References ACE_TRACE, send(), and ssize_t. 

00183 {
00184   ACE_TRACE ("ACE_UPIPE_Stream::send_n");
00185 
00186   size_t bytes_written;
00187   ssize_t len = 0;
00188 
00189   for (bytes_written = 0;
00190        bytes_written < n;
00191        bytes_written += len)
00192     {
00193       len = this->send (buf + bytes_written,
00194                         n - bytes_written,
00195                         timeout);
00196 
00197       if (len == -1)
00198         return -1;
00199     }
00200 
00201   return bytes_written;
00202 }

Friends And Related Function Documentation

friend class ACE_UPIPE_Acceptor [friend]
 

Definition at line 41 of file UPIPE_Stream.h.

friend class ACE_UPIPE_Connector [friend]
 

Definition at line 42 of file UPIPE_Stream.h.

Member Data Documentation

ACE_UPIPE_Stream::ACE_ALLOC_HOOK_DECLARE
 

Declare the dynamic allocation hooks.

Reimplemented from ACE_SPIPE.

Definition at line 104 of file UPIPE_Stream.h.

ACE_Message_Block* ACE_UPIPE_Stream::mb_last_ [private]
 

To hold the last ACE_Message_Block read out of the stream. Thus allowing subsequent reads from one ACE_Message_Block

Definition at line 112 of file UPIPE_Stream.h.

Referenced by recv(), and ~ACE_UPIPE_Stream().

int ACE_UPIPE_Stream::reference_count_ [private]
 

Keep track of whether the sender and receiver have both shut down.

Definition at line 123 of file UPIPE_Stream.h.

Referenced by ACE_UPIPE_Acceptor::accept(), and ACE_UPIPE_Connector::connect().

ACE_UPIPE_Addr ACE_UPIPE_Stream::remote_addr_ [private]
 

Address of who we are connected to.

Definition at line 115 of file UPIPE_Stream.h.

Referenced by ACE_UPIPE_Acceptor::accept(), and ACE_UPIPE_Connector::connect().

MT_Stream ACE_UPIPE_Stream::stream_ [private]
 

Stream component used by the UPIPE_Acceptor and UPIPE_Connector to link together two UPIPE_Streams.

Definition at line 119 of file UPIPE_Stream.h.

Referenced by ACE_UPIPE_Acceptor::accept().

The documentation for this class was generated from the following files:
Generated on Thu Nov 9 11:32:21 2006 for ACE by doxygen 1.3.6