poly
Fri Aug 12 01:13:46 CDT 2005
Thank you for your replay!
I get it now.
"Peter Wieland [MSFT]" <peterwie@nospam.microsoft.com>
???????:%23QnK4icnFHA.3828@TK2MSFTNGP12.phx.gbl...
> And since that's under the control of the application, the driver needs to
> be prepared for asynchronous I/O and properly handle multiple requests at
> one time itself.
>
> Also be sure you understand the difference between a dispatch routine
> (which can be called on multipel threads at once) and a StartIo routine.
> IoStartPacket provides serialization and will only be called on one thread
> at a time (though it's called at dispatch level so it's really only one
> processor at a time)
>
> -p
>
> --
> Please do not send e-mail directly to this alias. this alias is for
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>
> "Doron Holan [MS]" <doronh@nospam.microsoft.com> wrote in message
> news:uWtDBxWnFHA.2920@TK2MSFTNGP14.phx.gbl...
>> all i/o will be serialized by the i/o manager unless you open the HANDLE
>> as FILE_FLAG_OVERLAPPED
>>
>> d
>>
>> --
>> Please do not send e-mail directly to this alias. this alias is for
>> newsgroup purposes only.
>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.
>>
>>
>> "poly" <poly@no-span.com> wrote in message
>> news:%23qP5HMWnFHA.3568@TK2MSFTNGP10.phx.gbl...
>>>I try to use read thread and write thread working with the same handle.
>>>And make the threads pass IRP R/W continuity.
>>> One IRP received after another IRP compeleted.
>>>
>>> Why we prepare queue if the irp always go on this way?
>>>
>>> "poly" <poly@no-span.com>
>>> ¼¶¼g©ó¶l¥ó·s»D:%23L4DZBWnFHA.2080@TK2MSFTNGP14.phx.gbl...
>>>>i get a little misunderstand..
>>>>
>>>>
>>>> 1 Overlapped API returned after driver return pending.
>>>> 2 Does IO manager pass down IRP one by one?
>>>>
>>>> Serial sample code manage Queue by itself, Start Irp if there is no any
>>>> Irp is processing, otherwise queue it .
>>>> If there is current irp working now, it will not return until
>>>> compelete. How can the second Irp go into queue?
>>>>
>>>> Poly
>>>>
>>>>
>>>
>>>
>>
>>
>