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ACE_Asynch_Write_Dgram Class Reference

This class is a factory for starting off asynchronous writes on a UDP socket. This class forwards all methods to its implementation class. More...

#include <Asynch_IO.h>

Inheritance diagram for ACE_Asynch_Write_Dgram:

Inheritance graph
Collaboration diagram for ACE_Asynch_Write_Dgram:

Collaboration graph
List of all members.

Public Member Functions

 ACE_Asynch_Write_Dgram (void)
 A do nothing constructor.
virtual ~ACE_Asynch_Write_Dgram (void)
int open (ACE_Handler &handler, ACE_HANDLE handle=ACE_INVALID_HANDLE, const void *completion_key=0, ACE_Proactor *proactor=0)
ssize_t send (ACE_Message_Block *message_block, size_t &number_of_bytes_sent, int flags, const ACE_Addr &remote_addr, const void *act=0, int priority=0, int signal_number=ACE_SIGRTMIN)
virtual ACE_Asynch_Operation_Implimplementation (void) const
 Return the underlying implementation class.

Protected Attributes

 Implementation class that all methods will be forwarded to.

Detailed Description

This class is a factory for starting off asynchronous writes on a UDP socket. This class forwards all methods to its implementation class.

Once <open> is called, multiple asynchronous <writes>s can started using this class. An ACE_Asynch_Write_Dgram::Result will be passed back to the <handler> when the asynchronous write completes through the <ACE_Handler::handle_write_dgram> callback.

Constructor & Destructor Documentation

ACE_Asynch_Write_Dgram::ACE_Asynch_Write_Dgram void   ) 

A do nothing constructor.

ACE_Asynch_Write_Dgram::~ACE_Asynch_Write_Dgram void   )  [virtual]


Member Function Documentation

ACE_Asynch_Operation_Impl * ACE_Asynch_Write_Dgram::implementation void   )  const [virtual]

Return the underlying implementation class.

Implements ACE_Asynch_Operation.

int ACE_Asynch_Write_Dgram::open ACE_Handler handler,
const void *  completion_key = 0,
ACE_Proactor proactor = 0

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 <handler> to get the correct handle.

Reimplemented from ACE_Asynch_Operation.

ssize_t ACE_Asynch_Write_Dgram::send ACE_Message_Block message_block,
size_t &  number_of_bytes_sent,
int  flags,
const ACE_Addr remote_addr,
const void *  act = 0,
int  priority = 0,
int  signal_number = ACE_SIGRTMIN

This starts off an asynchronous send. Upto <message_block->total_length()> will be sent. <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 <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 <message_block>'s <rd_ptr>'s will be updated to reflect the bytes sent from each <message_block>.

Priority of the operation is specified by <priority>. On POSIX4-Unix, this is supported. Works like <nice> in Unix. Negative values are not allowed. 0 means priority of the operation same as the process priority. 1 means priority of the operation is one less than process. And so forth. On Win32, this argument is a no-op. <signal_number> is the POSIX4 real-time signal number to be used for the operation. <signal_number> ranges from ACE_SIGRTMIN to ACE_SIGRTMAX. This argument is a no-op on non-POSIX4 systems.

Member Data Documentation

ACE_Asynch_Write_Dgram_Impl* ACE_Asynch_Write_Dgram::implementation_ [protected]

Implementation class that all methods will be forwarded to.

The documentation for this class was generated from the following files:
Generated on Wed Jun 8 23:55:17 2005 for ACE by  doxygen