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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:

[legend]Collaboration diagram for ACE_POSIX_Asynch_Read_Dgram:

[legend]List of all members.

Public Methods
	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 Methods
	ACE_POSIX_Asynch_Read_Dgram (void)
	Do-nothing constructor.

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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.

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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.

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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 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.

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The documentation for this class was generated from the following files:

• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/POSIX_Asynch_IO.h
• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/POSIX_Asynch_IO.cpp

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