ACE_POSIX_Asynch_Read_Dgram Class Reference

This class is a factory for starting off asynchronous reads on a UDP socket. More...

#include <POSIX_Asynch_IO.h>

Inheritance diagram for ACE_POSIX_Asynch_Read_Dgram:

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Collaboration diagram for ACE_POSIX_Asynch_Read_Dgram:

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List of all members.

Public Member Functions

 ACE_POSIX_Asynch_Read_Dgram (ACE_POSIX_Proactor *posix_proactor)
 Constructor.
virtual ~ACE_POSIX_Asynch_Read_Dgram (void)
virtual ssize_t recv (ACE_Message_Block *message_block, size_t &number_of_bytes_recvd, int flags, int protocol_family, const void *act, int priority, int signal_number)

Protected Member Functions

 ACE_POSIX_Asynch_Read_Dgram (void)
 Do-nothing constructor.

Detailed Description

This class is a factory for starting off asynchronous reads on a UDP socket.

Once <open> is called, multiple asynchronous <read>s can be started using this class. An ACE_Asynch_Read_Dgram::Result will be passed back to the <handler> when the asynchronous reads completes through the <ACE_Handler::handle_read_stream> callback.


Constructor & Destructor Documentation

ACE_POSIX_Asynch_Read_Dgram::ACE_POSIX_Asynch_Read_Dgram ACE_POSIX_Proactor posix_proactor  ) 
 

Constructor.

ACE_POSIX_Asynch_Read_Dgram::~ACE_POSIX_Asynch_Read_Dgram void   )  [virtual]
 

ACE_POSIX_Asynch_Read_Dgram::ACE_POSIX_Asynch_Read_Dgram void   )  [protected]
 

Do-nothing constructor.


Member Function Documentation

ssize_t ACE_POSIX_Asynch_Read_Dgram::recv ACE_Message_Block message_block,
size_t &  number_of_bytes_recvd,
int  flags,
int  protocol_family,
const void *  act,
int  priority,
int  signal_number
[virtual]
 

This method queues an asynchronous read. Up to message_block->total_size() bytes will be read and stored in the message_block beginning at its write pointer. The message_block write pointer will be updated to reflect any added bytes if the read operation is successful completed. 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. <signal_number> argument is a no-op on non-POSIX4 systems.

Note:
Unlike the Windows version of this facility, no indication of immediate success can be returned, and number_of_bytes_read is never used.
  • flags Not used.
  • protocol_family Not used.
    Return values:
    0 The IO will complete asynchronously.
    -1 There was an error; see errno to get the error code.

Implements ACE_Asynch_Read_Dgram_Impl.


The documentation for this class was generated from the following files:
Generated on Wed Nov 23 15:49:42 2005 for ACE by  doxygen 1.4.5