ACE_Asynch_Read_Dgram_Impl Class Reference

Abstract base class for all the concrete implementation classes that provide different implementations for the ACE_Asynch_Read_Dgram. More...

#include <Asynch_IO_Impl.h>

Inheritance diagram for ACE_Asynch_Read_Dgram_Impl:

Inheritance graph
[legend]
Collaboration diagram for ACE_Asynch_Read_Dgram_Impl:

Collaboration graph
[legend]
List of all members.

Public Member Functions

virtual ~ACE_Asynch_Read_Dgram_Impl (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)=0

Protected Member Functions

 ACE_Asynch_Read_Dgram_Impl (void)
 Do-nothing constructor.


Detailed Description

Abstract base class for all the concrete implementation classes that provide different implementations for the ACE_Asynch_Read_Dgram.

Definition at line 647 of file Asynch_IO_Impl.h.


Constructor & Destructor Documentation

ACE_Asynch_Read_Dgram_Impl::~ACE_Asynch_Read_Dgram_Impl void   )  [virtual]
 

Definition at line 79 of file Asynch_IO_Impl.cpp.

00080 {
00081 }

ACE_Asynch_Read_Dgram_Impl::ACE_Asynch_Read_Dgram_Impl void   )  [protected]
 

Do-nothing constructor.

Definition at line 83 of file Asynch_IO_Impl.cpp.

00084 {
00085 }


Member Function Documentation

virtual ssize_t ACE_Asynch_Read_Dgram_Impl::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
[pure virtual]
 

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

Scatter/gather is supported on WIN32 by using the <message_block->cont()> method. Up to ACE_IOV_MAX 's are supported. Upto <message_block->size()> bytes will be read into each for a total of <message_block->total_size()> bytes. All 's 's will be updated to reflect the added bytes for each

Priority of the operation is specified by . On POSIX4-Unix, this is supported. Works like 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, is a no-op. is the POSIX4 real-time signal number to be used for the operation. ranges from ACE_SIGRTMIN to ACE_SIGRTMAX. This argument is a no-op on non-POSIX4 systems.

Implemented in ACE_POSIX_Asynch_Read_Dgram, and ACE_WIN32_Asynch_Read_Dgram.

Referenced by ACE_Asynch_Read_Dgram::recv().


The documentation for this class was generated from the following files:
Generated on Thu Nov 9 11:19:35 2006 for ACE by doxygen 1.3.6