#include <Asynch_IO.h>
Inheritance diagram for ACE_Asynch_Read_Dgram:
Public Member Functions | |
ACE_Asynch_Read_Dgram (void) | |
A do nothing constructor. | |
virtual | ~ACE_Asynch_Read_Dgram (void) |
Destructor. | |
int | open (ACE_Handler &handler, ACE_HANDLE handle=ACE_INVALID_HANDLE, const void *completion_key=0, ACE_Proactor *proactor=0) |
ssize_t | recv (ACE_Message_Block *message_block, size_t &number_of_bytes_recvd, int flags, int protocol_family=PF_INET, const void *act=0, int priority=0, int signal_number=ACE_SIGRTMIN) |
virtual ACE_Asynch_Operation_Impl * | implementation (void) const |
Return the underlying implementation class. | |
Protected Attributes | |
ACE_Asynch_Read_Dgram_Impl * | implementation_ |
Implementation class that all methods will be forwarded to. |
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_dgram} callback.
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A do nothing constructor.
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Destructor.
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Return the underlying implementation class.
Implements ACE_Asynch_Operation. |
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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. |
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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} 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, {priority} 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. |
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Implementation class that all methods will be forwarded to.
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