RandomAccessRequestBinding Class Reference

RandomAccessRequestBinding binds a RandomAccessRequest to a particular memory location being read from or written to. More...

#include <RandomAccessRequest.h>

Inheritance diagram for RandomAccessRequestBinding:

List of all members.

Public Member Functions
	RandomAccessRequestBinding ()
virtual	~RandomAccessRequestBinding ()
virtual PBuffer	getBuffer () const=0
	Returns: memory address where transfer should start.
virtual uint	getBufferSize () const=0
	Returns: number of contiguous bytes from getBuffer() to be used for transfer.
virtual void	notifyTransferCompletion (bool bSuccess)=0
	Receives notification when a transfer completes.

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Detailed Description

RandomAccessRequestBinding binds a RandomAccessRequest to a particular memory location being read from or written to.

Definition at line 51 of file RandomAccessRequest.h.

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Constructor & Destructor Documentation

RandomAccessRequestBinding::RandomAccessRequestBinding

(

)

[explicit]

Definition at line 119 of file DeviceAccessScheduler.cpp.

{
#ifdef __MSVC__
    // TODO:  only create this when ThreadPoolScheduler is being used?
    hEvent = CreateEvent(NULL,1,0,NULL);
    if (!hEvent) {
        throw new SysCallExcn("CreateEvent failed");
    }
#endif
}

RandomAccessRequestBinding::~RandomAccessRequestBinding

(

)

[virtual]

Definition at line 130 of file DeviceAccessScheduler.cpp.

{
#ifdef __MSVC__
    CloseHandle(hEvent);
#endif
}

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Member Function Documentation

virtual PBuffer RandomAccessRequestBinding::getBuffer

(

)

const [pure virtual]

Returns:

memory address where transfer should start.

Implemented in CachePage, BackupRestorePage, and RandomAccessFileDeviceTest::Binding.

Referenced by RandomAccessFileDevice::prepareTransfer(), and IoCompletionPortScheduler::schedule().

virtual uint RandomAccessRequestBinding::getBufferSize

(

)

const [pure virtual]

Returns:

number of contiguous bytes from getBuffer() to be used for transfer.

Implemented in CachePage, BackupRestorePage, and RandomAccessFileDeviceTest::Binding.

Referenced by RandomAccessFileDevice::prepareTransfer(), IoCompletionPortThread::run(), AioLinuxScheduler::run(), ThreadPoolScheduler::schedule(), and IoCompletionPortScheduler::schedule().

virtual void RandomAccessRequestBinding::notifyTransferCompletion

(

bool

bSuccess

)

[pure virtual]

Receives notification when a transfer completes.

Parameters:

bSuccess

true if the full buffer size was successfully transferred for this binding

Implemented in CachePage, BackupRestorePage, and RandomAccessFileDeviceTest::Binding.

Referenced by aio_handler(), IoCompletionPortThread::run(), AioPollingScheduler::run(), AioLinuxScheduler::run(), and IoCompletionPortScheduler::schedule().

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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

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