#include <WIN32_Asynch_IO.h>
Inheritance diagram for ACE_WIN32_Asynch_Read_Dgram:
Public Member Functions | |
ACE_WIN32_Asynch_Read_Dgram (ACE_WIN32_Proactor *win32_proactor) | |
Constructor. | |
virtual | ~ACE_WIN32_Asynch_Read_Dgram (void) |
Destructor. | |
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) |
int | open (const ACE_Handler::Proxy_Ptr &handler_proxy, ACE_HANDLE handle, const void *completion_key, ACE_Proactor *proactor) |
int | cancel (void) |
ACE_Proactor * | proactor (void) const |
Return the underlying proactor. | |
Protected Member Functions | |
ACE_WIN32_Asynch_Read_Dgram (void) | |
Do-nothing constructor. |
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.
ACE_WIN32_Asynch_Read_Dgram::ACE_WIN32_Asynch_Read_Dgram | ( | ACE_WIN32_Proactor * | win32_proactor | ) |
Constructor.
ACE_WIN32_Asynch_Read_Dgram::~ACE_WIN32_Asynch_Read_Dgram | ( | void | ) | [virtual] |
Destructor.
ACE_WIN32_Asynch_Read_Dgram::ACE_WIN32_Asynch_Read_Dgram | ( | void | ) | [protected] |
Do-nothing constructor.
int ACE_WIN32_Asynch_Read_Dgram::cancel | ( | void | ) | [virtual] |
This cancels all pending accepts operations that were issued by the calling thread. The function does not cancel asynchronous operations issued by other threads.
Reimplemented from ACE_WIN32_Asynch_Operation.
int ACE_WIN32_Asynch_Read_Dgram::open | ( | const ACE_Handler::Proxy_Ptr & | handler_proxy, | |
ACE_HANDLE | handle, | |||
const void * | completion_key, | |||
ACE_Proactor * | proactor | |||
) | [virtual] |
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_WIN32_Asynch_Operation.
ACE_Proactor * ACE_WIN32_Asynch_Read_Dgram::proactor | ( | void | ) | const [virtual] |
ssize_t ACE_WIN32_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 successfully 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.
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->size()> bytes will be read into each <message block>=""> for a total of <message_block->total_size()> bytes. All <message_block>'s <wr_ptr>'s will be updated to reflect the added bytes for each <message_block>
Implements ACE_Asynch_Read_Dgram_Impl.