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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:

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Collaboration diagram for ACE_Asynch_Write_Dgram:

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List of all members.

Public Methods

 ACE_Asynch_Write_Dgram (void)
 A do nothing constructor.

virtual ~ACE_Asynch_Write_Dgram (void)
 Destructor.

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)
ACE_Asynch_Write_Dgram_Implimplementation (void) const
 Return the underlying implementation class.


Protected Methods

void implementation (ACE_Asynch_Write_Dgram_Impl *implementation)
 Set the implementation class.


Protected Attributes

ACE_Asynch_Write_Dgram_Implimplementation_
 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]
 

Destructor.


Member Function Documentation

void ACE_Asynch_Write_Dgram::implementation ACE_Asynch_Write_Dgram_Impl   implementation [protected]
 

Set the implementation class.

ACE_Asynch_Write_Dgram_Impl * ACE_Asynch_Write_Dgram::implementation void    const
 

Return the underlying implementation class.

Reimplemented from ACE_Asynch_Operation.

int ACE_Asynch_Write_Dgram::open ACE_Handler   handler,
ACE_HANDLE    handle = ACE_INVALID_HANDLE,
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.

Reimplemented from ACE_Asynch_Operation.


The documentation for this class was generated from the following files:
Generated on Wed Jan 14 22:41:33 2004 for ACE by doxygen1.2.18