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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:

Inheritance graph
Collaboration diagram for ACE_POSIX_Asynch_Read_Dgram:

Collaboration graph
List of all members.

Public Methods

 ACE_POSIX_Asynch_Read_Dgram (ACE_POSIX_Proactor *posix_proactor)

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 Methods

 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


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

This starts off an asynchronous read. Upto <message_block->total_size()> will be read and stored in the <message_block>. <message_block>'s <wr_ptr> will be updated to reflect the added bytes if the read operation is successful completed. Return code of 1 means immediate success and number_of_bytes_recvd will contain number of bytes read. The <ACE_Handler::handle_read_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.

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.

Implements ACE_Asynch_Read_Dgram_Impl.

The documentation for this class was generated from the following files:
Generated on Wed Jan 14 22:45:58 2004 for ACE by doxygen1.2.18