#include <Asynch_IO.h>
Inheritance diagram for ACE_Asynch_Read_File
Public Methods | |
ACE_Asynch_Read_File (void) | |
A do nothing constructor. | |
virtual | ~ACE_Asynch_Read_File (void) |
Destructor. | |
int | open (ACE_Handler &handler, ACE_HANDLE handle = ACE_INVALID_HANDLE, const void *completion_key = 0, ACE_Proactor *proactor = 0) |
int | read (ACE_Message_Block &message_block, u_long bytes_to_read, u_long offset = 0, u_long offset_high = 0, const void *act = 0, int priority = 0, int signal_number = ACE_SIGRTMIN) |
ACE_Asynch_Read_File_Impl* | implementation (void) const |
Return the underlying implementation class. | |
Protected Methods | |
void | implementation (ACE_Asynch_Read_File_Impl *implementation) |
Set the implementation class. | |
Protected Attributes | |
ACE_Asynch_Read_File_Impl* | implementation_ |
Delegation/implementation class that all methods will be forwarded to. |
Once <open> is called, multiple asynchronous <read>s can started using this class. An ACE_Asynch_Read_File::Result will be passed back to the <handler> when the asynchronous reads completes through the callback. This class differs slightly from ACE_Asynch_Read_Stream as it allows the user to specify an offset for the read.
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A do nothing constructor.
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Destructor.
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Set the implementation class.
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Return the underlying implementation class.
Reimplemented from ACE_Asynch_Read_Stream. |
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Initializes the factory with information which will be used with each asynchronous call. If (<handle> == ACE_INVALID_HANDLE), will be called on the <handler> to get the correct handle. Reimplemented from ACE_Asynch_Read_Stream. |
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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. 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. |
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Delegation/implementation class that all methods will be forwarded to.
Reimplemented from ACE_Asynch_Read_Stream. |