This class is a factory for starting off asynchronous reads on a UDP socket.
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#include <POSIX_Asynch_IO.h>
This class is a factory for starting off asynchronous reads on a UDP socket.
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_POSIX_Asynch_Read_Dgram::ACE_POSIX_Asynch_Read_Dgram |
( |
ACE_POSIX_Proactor * |
posix_proactor | ) |
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| ACE_POSIX_Asynch_Read_Dgram::~ACE_POSIX_Asynch_Read_Dgram |
( |
void |
| ) |
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virtual |
| ACE_POSIX_Asynch_Read_Dgram::ACE_POSIX_Asynch_Read_Dgram |
( |
void |
| ) |
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protected |
| ssize_t ACE_POSIX_Asynch_Read_Dgram::recv |
( |
ACE_Message_Block * |
message_block, |
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size_t & |
number_of_bytes_recvd, |
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int |
flags, |
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int |
protocol_family, |
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const void * |
act, |
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int |
priority, |
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int |
signal_number |
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) |
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virtual |
This method queues an asynchronous read. Up to message_block->total_size() bytes will be read and stored in the message_block beginning at its write pointer. The message_block write pointer will be updated to reflect any added bytes if the read operation is successful completed. 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. signal_number argument is a no-op on non-POSIX4 systems.
- Note
- Unlike the Windows version of this facility, no indication of immediate success can be returned, and number_of_bytes_read is never used.
- flags Not used.
- protocol_family Not used.
- Return values
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| 0 | The IO will complete asynchronously. |
| -1 | There was an error; see errno to get the error code. |
Implements ACE_Asynch_Read_Dgram_Impl.
The documentation for this class was generated from the following files:
Public Member Functions inherited from ACE_Asynch_Read_Dgram_Impl
1.8.3.1