ACE  6.4.2
Public Member Functions | Protected Member Functions | List of all members
ACE_Asynch_Write_Dgram_Impl Class Referenceabstract

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

#include <Asynch_IO_Impl.h>

Inheritance diagram for ACE_Asynch_Write_Dgram_Impl:
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Collaboration diagram for ACE_Asynch_Write_Dgram_Impl:
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Public Member Functions

virtual ~ACE_Asynch_Write_Dgram_Impl (void)
 
virtual ssize_t send (ACE_Message_Block *message_block, size_t &number_of_bytes_sent, int flags, const ACE_Addr &addr, const void *act, int priority, int signal_number)=0
 
- Public Member Functions inherited from ACE_Asynch_Operation_Impl
virtual ~ACE_Asynch_Operation_Impl (void)
 
virtual int open (const ACE_Handler::Proxy_Ptr &handler_proxy, ACE_HANDLE handle, const void *completion_key, ACE_Proactor *proactor)=0
 
virtual int cancel (void)=0
 
virtual ACE_Proactorproactor (void) const =0
 Return the underlying proactor. More...
 

Protected Member Functions

 ACE_Asynch_Write_Dgram_Impl (void)
 Do-nothing constructor. More...
 
- Protected Member Functions inherited from ACE_Asynch_Operation_Impl
 ACE_Asynch_Operation_Impl (void)
 Do-nothing constructor. More...
 

Detailed Description

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

Constructor & Destructor Documentation

ACE_Asynch_Write_Dgram_Impl::~ACE_Asynch_Write_Dgram_Impl ( void  )
virtual
ACE_Asynch_Write_Dgram_Impl::ACE_Asynch_Write_Dgram_Impl ( void  )
protected

Do-nothing constructor.

Member Function Documentation

virtual ssize_t ACE_Asynch_Write_Dgram_Impl::send ( ACE_Message_Block message_block,
size_t &  number_of_bytes_sent,
int  flags,
const ACE_Addr addr,
const void *  act,
int  priority,
int  signal_number 
)
pure virtual

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 successful 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.

Implemented in ACE_POSIX_Asynch_Write_Dgram.


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