Fennel: RandomAccessRequest Class Reference (original) (raw)
RandomAccessRequest represents one logical unit of I/O against a RandomAccessDevice. More...
#include <[RandomAccessRequest.h](RandomAccessRequest%5F8h-source.html)>
| Public Types | |
|---|---|
| enum | Type { READ, WRITE } |
| typedef IntrusiveList< RandomAccessRequestBinding > | BindingList |
| typedef IntrusiveListIter< RandomAccessRequestBinding > | BindingListIter |
| typedef IntrusiveListMutator< RandomAccessRequestBinding > | BindingListMutator |
| Public Member Functions | |
| void | execute () |
| Executes this request. | |
| Public Attributes | |
| RandomAccessDevice * | pDevice |
| The device to be accessed. | |
| FileSize | cbOffset |
| Byte offset within device at which access should start. | |
| FileSize | cbTransfer |
| Number of bytes to be transferred. | |
| Type | type |
| Access type: READ for transfer from device to memory; WRITE for transfer from memory to device. | |
| BindingList | bindingList |
| Bindings for memory source or destination and notifications. |
Detailed Description
RandomAccessRequest represents one logical unit of I/O against a RandomAccessDevice.
Currently supported operations are reads and writes spanning a contiguous range of byte offsets within the device. The RandomAccessRequestBinding memory locations need not be contiguous (scatter/gather).
Definition at line 94 of file RandomAccessRequest.h.
Member Typedef Documentation
Member Enumeration Documentation
Member Function Documentation
| void RandomAccessRequest::execute | ( | | ) | | --------------------------------- | - | | - |
Member Data Documentation
The device to be accessed.
It's a pointer rather than a reference so that RandomAccessRequest behaves as a concrete class.
Definition at line 111 of file RandomAccessRequest.h.
Referenced by SegPageBackupRestoreDevice::backupPage(), execute(), CacheImpl< PageT, VictimPolicyT >::prefetchBatch(), RandomAccessFileDevice::prepareTransfer(), SegPageBackupRestoreDevice::restorePage(), ThreadPoolScheduler::schedule(), IoCompletionPortScheduler::schedule(), AioSignalScheduler::schedule(), AioPollingScheduler::schedule(), AioLinuxScheduler::schedule(), RandomAccessFileDeviceTest::testAsyncIOImpl(), RandomAccessFileDevice::transfer(), and CacheImpl< PageT, VictimPolicyT >::transferPageAsync().
Byte offset within device at which access should start.
Definition at line 116 of file RandomAccessRequest.h.
Referenced by SegPageBackupRestoreDevice::backupPage(), CacheImpl< PageT, VictimPolicyT >::prefetchBatch(), RandomAccessFileDevice::prepareTransfer(), SegPageBackupRestoreDevice::restorePage(), ThreadPoolScheduler::schedule(), IoCompletionPortScheduler::schedule(), RandomAccessFileDeviceTest::testAsyncIOImpl(), FileDevice::transfer(), and CacheImpl< PageT, VictimPolicyT >::transferPageAsync().
Number of bytes to be transferred.
Definition at line 121 of file RandomAccessRequest.h.
Referenced by SegPageBackupRestoreDevice::backupPage(), CacheImpl< PageT, VictimPolicyT >::prefetchBatch(), RandomAccessFileDevice::prepareTransfer(), SegPageBackupRestoreDevice::restorePage(), ThreadPoolScheduler::schedule(), IoCompletionPortScheduler::schedule(), RandomAccessFileDeviceTest::testAsyncIOImpl(), FileDevice::transfer(), and CacheImpl< PageT, VictimPolicyT >::transferPageAsync().
Access type: READ for transfer from device to memory; WRITE for transfer from memory to device.
Definition at line 127 of file RandomAccessRequest.h.
Referenced by SegPageBackupRestoreDevice::backupPage(), CacheImpl< PageT, VictimPolicyT >::prefetchBatch(), RandomAccessFileDevice::prepareTransfer(), SegPageBackupRestoreDevice::restorePage(), ThreadPoolScheduler::schedule(), IoCompletionPortScheduler::schedule(), AioSignalScheduler::schedule(), RandomAccessFileDeviceTest::testAsyncIOImpl(), FileDevice::transfer(), and CacheImpl< PageT, VictimPolicyT >::transferPageAsync().
Bindings for memory source or destination and notifications.
Definition at line 132 of file RandomAccessRequest.h.
Referenced by SegPageBackupRestoreDevice::backupPage(), CacheImpl< PageT, VictimPolicyT >::prefetchBatch(), RandomAccessFileDevice::prepareTransfer(), SegPageBackupRestoreDevice::restorePage(), ThreadPoolScheduler::schedule(), IoCompletionPortScheduler::schedule(), AioSignalScheduler::schedule(), AioPollingScheduler::schedule(), AioLinuxScheduler::schedule(), RandomAccessFileDeviceTest::testAsyncIOImpl(), FileDevice::transfer(), and CacheImpl< PageT, VictimPolicyT >::transferPageAsync().
The documentation for this class was generated from the following files:
- /home/pub/open/dev/fennel/device/RandomAccessRequest.h
- /home/pub/open/dev/fennel/device/DeviceAccessScheduler.cpp
Generated on Mon Jun 22 04:00:44 2009 for Fennel by 
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