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ACE
6.0.7
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This class is a factory for starting off asynchronous reads on a file. This class implements <ACE_Asynch_Read_File> for all POSIX implementations of Proactor. More...
#include <POSIX_Asynch_IO.h>


Public Member Functions | |
| ACE_POSIX_Asynch_Read_File (ACE_POSIX_Proactor *posix_proactor) | |
| Constructor. | |
| int | read (ACE_Message_Block &message_block, size_t bytes_to_read, u_long offset, u_long offset_high, const void *act, int priority, int signal_number=0) |
| virtual | ~ACE_POSIX_Asynch_Read_File (void) |
| Destructor. | |
Private Member Functions | |
| int | read (ACE_Message_Block &message_block, size_t bytes_to_read, const void *act, int priority, int signal_number=0) |
This class is a factory for starting off asynchronous reads on a file. This class implements <ACE_Asynch_Read_File> for all POSIX implementations of Proactor.
Once <open> is called, multiple asynchronous <read>s can started using this class. A <ACE_Asynch_Read_File::Result> will be passed back to the handler when the asynchronous reads completes through the <ACE_Handler::handle_read_file> callback.
This class differs slightly from <ACE_Asynch_Read_Stream> as it allows the user to specify an offset for the read.
| ACE_POSIX_Asynch_Read_File::ACE_POSIX_Asynch_Read_File | ( | ACE_POSIX_Proactor * | posix_proactor | ) |
Constructor.
| ACE_POSIX_Asynch_Read_File::~ACE_POSIX_Asynch_Read_File | ( | void | ) | [virtual] |
Destructor.
| int ACE_POSIX_Asynch_Read_File::read | ( | ACE_Message_Block & | message_block, |
| size_t | bytes_to_read, | ||
| u_long | offset, | ||
| u_long | offset_high, | ||
| const void * | act, | ||
| int | priority, | ||
| int | signal_number = 0 |
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| ) | [virtual] |
This starts off an asynchronous read. Upto bytes_to_read will be read and stored in the message_block. The read will start at offset from the beginning of the file.
Implements ACE_Asynch_Read_File_Impl.
| int ACE_POSIX_Asynch_Read_File::read | ( | ACE_Message_Block & | message_block, |
| size_t | bytes_to_read, | ||
| const void * | act, | ||
| int | priority, | ||
| int | signal_number = 0 |
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| ) | [private, virtual] |
This belongs to ACE_POSIX_Asynch_Read_Stream. We have defined this here to avoid compiler warnings and forward the method to <ACE_POSIX_Asynch_Read_Stream::read>.
Implements ACE_Asynch_Read_File_Impl.
1.7.5