---

ACE_Asynch_Write_Dgram Class Reference

This class is a factory for starting off asynchronous writes on a UDP socket. This class forwards all methods to its implementation class. More...

#include <Asynch_IO.h>

Inheritance diagram for ACE_Asynch_Write_Dgram:

[legend]Collaboration diagram for ACE_Asynch_Write_Dgram:

[legend]List of all members.

Public Methods
	ACE_Asynch_Write_Dgram (void)
	A do nothing constructor. More...
virtual	~ACE_Asynch_Write_Dgram (void)
	Destructor. More...
int	open (ACE_Handler &handler, ACE_HANDLE handle=ACE_INVALID_HANDLE, const void *completion_key=0, ACE_Proactor *proactor=0)
ssize_t	send (ACE_Message_Block *message_block, size_t &number_of_bytes_sent, int flags, const ACE_Addr &remote_addr, const void *act=0, int priority=0, int signal_number=ACE_SIGRTMIN)
ACE_Asynch_Write_Dgram_Impl *	implementation (void) const
	Return the underlying implementation class. More...
Protected Methods
void	implementation (ACE_Asynch_Write_Dgram_Impl *implementation)
	Set the implementation class. More...
Protected Attributes
ACE_Asynch_Write_Dgram_Impl *	implementation_
	Implementation class that all methods will be forwarded to. More...

---

Detailed Description

This class is a factory for starting off asynchronous writes on a UDP socket. This class forwards all methods to its implementation class.

Once <open> is called, multiple asynchronous <writes>s can started using this class. An ACE_Asynch_Write_Dgram::Result will be passed back to the <handler> when the asynchronous write completes through the <ACE_Handler::handle_write_dgram> callback.

Definition at line 1347 of file Asynch_IO.h.

---

Constructor & Destructor Documentation

ACE_Asynch_Write_Dgram::ACE_Asynch_Write_Dgram (  void    )

A do nothing constructor. Definition at line 1341 of file Asynch_IO.cpp. References ACE_Asynch_Read_Dgram::implementation_. : implementation_ (0) { }

ACE_Asynch_Write_Dgram::~ACE_Asynch_Write_Dgram (  void    )  [virtual]

Destructor. Definition at line 1346 of file Asynch_IO.cpp. { }

---

Member Function Documentation

void ACE_Asynch_Write_Dgram::implementation (  ACE_Asynch_Write_Dgram_Impl *    implementation )  [protected]

Set the implementation class. Definition at line 1403 of file Asynch_IO.cpp. References ACE_Asynch_Operation::implementation, and implementation_. { this->implementation_ = implementation; // Init the base class' implementation also. ACE_Asynch_Operation::implementation (this->implementation_); }

ACE_Asynch_Write_Dgram_Impl * ACE_Asynch_Write_Dgram::implementation (  void    )  const

Return the underlying implementation class. Reimplemented from ACE_Asynch_Operation. Definition at line 1397 of file Asynch_IO.cpp. References implementation_. Referenced by open, ACE_Asynch_Write_Dgram::Result::Result, and send. { return this->implementation_; }

int ACE_Asynch_Write_Dgram::open (  ACE_Handler &    handler, ACE_HANDLE    handle = ACE_INVALID_HANDLE, const void *    completion_key = 0, ACE_Proactor *    proactor = 0 )

Initializes the factory with information which will be used with each asynchronous call. If (<handle> == ACE_INVALID_HANDLE), <ACE_Handler::handle> will be called on the <handler> to get the correct handle. Reimplemented from ACE_Asynch_Operation. Definition at line 1351 of file Asynch_IO.cpp. References ACE_Proactor::create_asynch_write_dgram, ACE_Asynch_Operation::get_proactor, implementation, implementation_, and ACE_Asynch_Operation::open. { // Get a proactor for/from the user. proactor = this->get_proactor (proactor, handler); // Delete the old implementation. delete this->implementation_; this->implementation_ = 0; // Now let us get the implementation initialized. ACE_Asynch_Write_Dgram_Impl *implementation = proactor->create_asynch_write_dgram (); if (implementation == 0) return -1; // Set the implementation class this->implementation (implementation); // Call the <open> method of the base class. return ACE_Asynch_Operation::open (handler, handle, completion_key, proactor); }

ssize_t ACE_Asynch_Write_Dgram::send (  ACE_Message_Block *    message_block, size_t &    number_of_bytes_sent, int    flags, const ACE_Addr &    remote_addr, const void *    act = 0, int    priority = 0, int    signal_number = ACE_SIGRTMIN )

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 successfully 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. Definition at line 1379 of file Asynch_IO.cpp. References implementation, and ACE_Asynch_Write_Dgram_Impl::send. { return this->implementation ()->send (message_block, number_of_bytes_sent, flags, remote_addr, act, priority, signal_number); }

---

Member Data Documentation

ACE_Asynch_Write_Dgram_Impl* ACE_Asynch_Write_Dgram::implementation_ [protected]

Implementation class that all methods will be forwarded to. Reimplemented from ACE_Asynch_Operation. Definition at line 1410 of file Asynch_IO.h. Referenced by implementation, open, and ACE_Asynch_Write_Dgram::Result::Result.

---

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

• Asynch_IO.h
• Asynch_IO.cpp

---