Interlocked func in between a Spinlock?!

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  - 1
    - Printer Driver Hi All, I am developing a printer driver. I am using MSPLOT sample of DDK. My question is, Do i have to change any code or INF file to make it install as USB or Network printer? Thanks in advance abdul Tag: Interlocked func in between a Spinlock?! Tag: 86693
  - 2
    - Can't disable Network Cards Hi I'm writing a program that Installs Network Cards on the PC. One of the cards has probably a bugged driver and it can't be disabled from windows' "Network Connections" window(I have to disable the card during the program). The problem is, that even after uninstalling that card from the PC, other cards can't be disabled as well. Has anyone encountered such a behavior or has an idea? Thanks Tag: Interlocked func in between a Spinlock?! Tag: 86687
  - 3
    - OID_802_11_ADD_KEY or OID_802_11_ADD_WEP Hi I'm writing a program that should set WEP key to wireless cards drivers. While snooping windows' Wireless Zero Configuration Service, i've noticed that with certain cards it sets OID_802_11_ADD_KEY and with other cards it sets OID_802_11_ADD_WEP. My question is how does WZC knows which OID does the driver expect to receive? (there are no error messages, so it doesn't just try them both...) Tag: Interlocked func in between a Spinlock?! Tag: 86686
  - 4
    - [AVStream] How to display a interlace video with 2 fields in 1 fra Hi all, I'm writing a AVStream driver for a video capture device. The data format is ITU656, 720 x 576 and interlace. There are 2 fields in 1 frame. I fill a KS_DATARANGE_VIDEO2 structure to describe my data format. Is that right? Tag: Interlocked func in between a Spinlock?! Tag: 86685
  - 5
    - Help needed on writing a pseudo audio driver Hi, I have done lots of ground work, but could not find any satisfactory explanation on this. My requirement is like that - i will have an pseudo audio driver registered. For one of my application (voice chat application), I will select this driver for audio i/p and o/p. Application will deliver any incoming voice to the pseudo driver for audio o/p (in normal case, it would have been given to the sound card driver in the system). The pseudo audio driver will forward this voice to somewhere else(lets say X). The pseudo audio driver will get user voice i/p from X and forward it to the voice chat application (in that case X is acting as a microphone source). Initially I was thinking it won't be possible in windows. Then I came across MSVDM where they have written a driver for storing voice to a file instead of o/p it to sound card. I was thinking to tweak this for my purpose, but, as I am new to windows driver I could not understand few things. How about writing a audio filter driver? Please guide me as to what will best suit my requirement. I must admit windows is a very difficult bitch to grab. It is taking hell lot of time. the more I read more I get confused. An early reply will be very much appreciated. Any pointers or help in this regard will be highly appreciated. -paul Tag: Interlocked func in between a Spinlock?! Tag: 86684
  - 6
    - DrvStartDoc- with no job id Hi, Can anyone tell me, what action is to be done from driver side ,if DrvStartDoc is called with job id as 0? In my code, im getting calls to DrvStartDoc twice(in case if application calls ResetDC() ) and all the document related commands are being sent to printer twice. Thanks in advance Tag: Interlocked func in between a Spinlock?! Tag: 86680
  - 7
    - cursor background drawn with wrong bitmap. Hi, I want to achieve screen rotation with increment steps of 90 degrees. To start with I am targetting only 180 degree rotation.I have developed display driver for this. This is just a punting driver. When I get a drawing call, I am rotating the source, repositioning bounding RECT and punting it using Engxxx calls. I am facing problem with cursor back ground. When I move cursor, bounding rect of cursor is drawn with wrong image. For example when I move cursor on the desktop, cursor bounding rect of old location will be redrawn with the image which will be there if I dont rotate the screen in my driver. To achive perfect screen rotation do I need to develop any more supporting drivers like miniport filter driver etc? if yes, what should be function of that? Regards, Sunil Tag: Interlocked func in between a Spinlock?! Tag: 86667
  - 8
    - PcNewPort the Only Way? I'm trying to develop a dummy audio device for streaming. PcNewMiniport doesnt appear to support any kind of Wave devices. PcNewPort seems affiliated with DMA and pci bus & all that jazz. I know the msavd driver just hacks around it, but is there a more sensible solution? thanks rektide Tag: Interlocked func in between a Spinlock?! Tag: 86661
  - 9
    - I have device driver jobs in Silicon Valley If you develop drivers for graphics or audio or storage, I have fulltime opportunities at a solid and exciting company in Silicon Valley. This company is doing new and exciting things that noone else is doing yet and the opportunity to work with other smart Engineers/Developers is here!! The work is in Silicon Valley, so we need you to be there, or willing to move there from another spot in the USA (will pay relocation for right folks of course). I represent a great company, and the company is full of very intelligant, capable and creative folks! We need software developers/engineers with openGL or 3D experience, and we need people that create device drivers for Audio. We also need people that create device drivers for Windows storage (sata, scsi, raid etc). If you are seeking to work on new and exciting technology at a great company, please contact me, Maryellen O'Connell at maryell...@volt.com or call me at 888-933-8658. Thanks! Tag: Interlocked func in between a Spinlock?! Tag: 86659
  - 10
    - Re: Disable "use This Device As Primary Monitor" always secondary monitor Hi, There was a post on this topic a couple of weeks back, but there was not reply. I am wondering if anyone knows the solution to this. i.e in the display driver disable the feature to use it as a primary monitor. Regards Mudeem Tag: Interlocked func in between a Spinlock?! Tag: 86656
  - 11
    - ScsiDebugPrint Okay, I'm pulling my hair out over an issue that does not deserve near the amount of time I've devoted to it. I'm trying to get ScsiDebugPrint to work in a ScsiPort miniport driver. Here's what I've got: - A test "driver" with only DriverEntry. It #includes miniport.h and scsi.h. I have 4 calls to ScsiDebugPrint() in DriverEntry, with 0-3 values for first the DebugPrintLevelArg. - I link against scsiport.lib. I'm using the latest WDK. - I've tried running with a checked build of scsiport.sys that I rammed into the sys drivers dir of my target box (having turned off file protection in the registry [SFCDisable]). - I run with a debug serial hook-up to my target PC. - I've got Debug Print Filter registry entries: DEFAULT, DPFLTR, IHVBUS, IHVDRIVER, IHVNETWORK all set to dword 0xf. - If I change the driver to instead include wdm.h, link against wdm.lib, and use DbgPrint(), this works. But of course I can't use DbgPrint() w/ a ScsiPort miniport driver. Help, anyone? Thanks. -mat loik@<company>.com Synopsys Hillsboro, OR Tag: Interlocked func in between a Spinlock?! Tag: 86647
  - 12
    - WPA2 pre-authentication I'm working on WLAN driver for Windows Mobile 5. On AKU3.0 I tested PMK cache and it works just fine. But full pre-authentication does not work. When device is connected to the AP it does not try to pre-authenticate with other AP using existing link. It cause full 802.1x authentication when first AP is turned off. Does AKU3.0 support pre-authentication? Is there any additional requerments for the WLAN driver? Thanks, Artiom Tag: Interlocked func in between a Spinlock?! Tag: 86644
  - 13
    - NDIS driver. hello, i am developing a ndis miniport driver. my hardware is pci cardbus. i am developing miniport driver as the middle layer. currently i am getting the data from the protocol driver layer. but whatever data i am sending to the upper layer (recv path) is not recognizing. 1). can anyone tell me how to make proper packet and send it to the upper layer. 2). do i need to send the ethernet header also (14 bytes) in my data frame while calling NdisMReceiveIndicate(). ? 3). What are the main parameters need to be checked while creating a fresh packet and send it to upper layer,? thanks Tag: Interlocked func in between a Spinlock?! Tag: 86631
  - 14
    - How to prevent share drive Hello, I've own virtual disk(similar to ramdisk) and I don't want the drive to be shared. Is it possible? I've tried IoCreateDeviceSecure and return STATUS_ACCESS_DENIED in IRP_MJ_CREATE without success. -- Marcin Gabryszewski G DATA Software www.gdata.pl address:<FirstName><dot><Surname><at><gdata><dot><pl> Tag: Interlocked func in between a Spinlock?! Tag: 86627
  - 15
    - Reqarding the inf file creation Hi All, Currently i am working on layered driver architecture for windows XP.I wanted to create the inf file for the filter driver...Do any body have the tutorial abt what all inf file must contain or some refrences or some tool which will help me right the inf file for the filter driver. with regards jaggi Tag: Interlocked func in between a Spinlock?! Tag: 86622
  - 16
    - wdk Vista mirror driver After making the needed changes my mirror driver is back runnning in Vista. But it act the same as before, directx stuff (like screensavers) generate a black screen. In the documentation "3 lines of extra info" they mention GCAPS2_EXCLUDELAYERED GCAPS2_INCLUDEAPIBITMAP but no futher usage doc is available. Tha sample mirror driver have the function DrvRenderhint() this seems to be total undocumented. 1) Does the mirror driver on Vista have a way to capture directx ? 2) Is there any documentation available about the changes between XP and Vista and usage of the new options ? Tag: Interlocked func in between a Spinlock?! Tag: 86619
  - 17
    - DIFx: DriverPackageGetPath on Vista Hi! It looks like that DIFx Tools v2.01 are not fully supported yet on Vista (RC1), right? (as documented in the DIFx documentation). Cause DriverPackageGetPath failes and so it can´t be used for example with InstallShield 12 installations (which includes a device driver wizard that makes use of DIFx v2.01). Here is the MSI log result: DIFXAPP: INFO: ENTER: DriverPackageGetPathW DIFXAPP: ERROR: DriverPackageGetPath is not yet supported for PnP drivers on LH. DIFXAPP: INFO: RETURN: DriverPackageGetPathW (0xA) When will it be fully supported on Vista? Must I wait for a newer Vista build or a later DIFx version? Thanks, Holger Tag: Interlocked func in between a Spinlock?! Tag: 86616
  - 18
    - Looking for a sample UPS minidriver Hi, i'm looking for an example UPS minidriver. There's no example provided with the DDK. Can you help me ? Regards Thomas Tag: Interlocked func in between a Spinlock?! Tag: 86612
  - 19
    - ZwXxxx calls in video miniport driver. Hi, Is it possible to make ZwXxxx calls from video miniport driver ? I tried to call ZwCreateSection and ZwMapViewOfSection. For these function I included wdm.h and ntddk.h. But as soon as I included these two files, many redefinition errors came in header files. I think there is some conflict in video.h , miniport.h and wdm.h . ntddk.h. I also read in ddk that video miniport driver can call only VideoXxxx and AgpXxx functions that are exported bye videoport driver i.e. videoprt.sys. Is this correct. Please , if anyone has some idea then do let me know. Thanks. Tag: Interlocked func in between a Spinlock?! Tag: 86611
  - 20
    - Device removal and "create requests" When the DDK says to fail "create requests" after succeeding an IRP_MN_QUERY_REMOVE_DEVICE, is it talking about IRP_MJ_CREATE? I'd previously thought most drivers don't do anything for IRP_MJ_CREATE. Is this a typo, since it also says that protection against new open handles should already be taken care of by the OS except in broken old Windows 98/Me (and open handles is what IRP_MJ_CREATE implies, isn't it)? Tag: Interlocked func in between a Spinlock?! Tag: 86606
  - 21
    - A sort of "query remove lock"? The documentation for IRP_MN_QUERY_REMOVE_DEVICE in the DDK mentions that if a driver has an outstanding reference against itself from IRP_MN_QUERY_INTERFACE that it should fail the query remove IRP. That makes sense. So, some query interface reference count needs to be checked before succeeding a query remove (except there's no need to wait for it to drop to 0 like with a remove lock because it can't be predicted how far into the future the interface reference would finally be released). Also, some mechanism needs to make query interface IRPs begin failing after a query remove IRP handler has begun. Otherwise letting out an interface reference would race with the query remove, an interface reference could be let out afterwards, and then the device couldn't later be removed as should be expected when a query remove succeeds. The "toaster" sample does the first part but not the second. That's a mistake, isn't it? (also, this made me think what other sorts of operations should be waited for in IRP_MN_REMOVE_DEVICE vs. IRP_MN_QUERY_REMOVE_DEVICE. Is it that IRP_MN_REMOVE_DEVICE can wait for operations that take a short period of time to finish and clean up while IRP_MN_QUERY_REMOVE_DEVICE is for ones that would take so long that removal should simply be canceled?) Tag: Interlocked func in between a Spinlock?! Tag: 86605
  - 22
    - using ddkbuild.bat I'm using VS and ddkbuild.bat to build my driver. I call ddkbuild as follows... ddkbuild -W2K checked. My driver gets built in objchk_wnet_x86\i386. If I build the driver from the w2k checked build environment it builds my driver in objchk_w2k_x86\i386. It looks like ddkbuild is invoking a different ddk build environment. Is this a problem and what is wnet? Tag: Interlocked func in between a Spinlock?! Tag: 86603
  - 23
    - PCI Express Standby issue Hi Folks, We are trying to develop a nic driver and are noticing that after standby the system crashes: more specifically, the first interrupt after standby causes a crash. More background: Since the standby removes the power to the card, we save the pci config space before the standby operation. After the system comes out of standby, we reset the chip (to clear any stale state), which in turn resets the express link. The driver then waits for a while (for the link to establish back) and restores the pci config space. After that we able access the chip internal registers however, when we enable the interrupts, the first interrupt immedaitely cause a crash. Has anyone seen this behavior. The driver is being tested on a windows 2003 server x64 platform. -thanks Tag: Interlocked func in between a Spinlock?! Tag: 86594
  - 24
    - IRP_MN_STOP_DEVICE on Windows 98 I'm not sure if Windows 98/Me still matters, but I hit a section that mentions it in the middle of the 2003 DDK PnP area. I know that the old Windows are a little different from the newer Windows, but I'm wondering if this is a case of different or just plain broken. What I'm wondering is if a device receives IRP_MN_STOP_DEVICE is it supposed to queue incoming IRPs or fail them? For resource re-balancing queueing sounds right, but for disabling a device from Device Manager failing them does (or they'd be queued for a very long time until the device was re-enabled or the requester finally gave up and canceled them). The problem is doesn't Windows 98/Me send IRP_MN_STOP_DEVICE for both of these. Is there any way to distinguish the two situations on that old platform? Tag: Interlocked func in between a Spinlock?! Tag: 86592
  - 25
    - MiniportTimer problem Dear All, I need to call one function in my NDIS IM driver every 30 seconds. So I used MiniportTimer. In MiniportInitialize I've got NdisMInitializeTimer and NdisMSetPeriodicTimer. In MiniportHalt I call NdisMCancelTimer. Everything just like DDK says. But I figured that MiniportTimer function is being called every 30 seconds not once but three times! Do you have any idea how to fix it or what could be wrong? Tag: Interlocked func in between a Spinlock?! Tag: 86589
- Next
  - 1
    - KCorp wireless card drivers Hey, I put windows vista ultimate edition beta 2 on a couple of days ago and I can't load my Kcorp wireless device drivers. Does anyone know if they are out yet? It's a PCI card for the KLS-660 Wireless PCI desktop network adapter. Thanks. Tag: Interlocked func in between a Spinlock?! Tag: 86585
  - 2
    - Second HID for exclusive use. Please tell me ways to implement, if I have a second HID USB keyboard with multiple Top Level Collections, (in this case a Microsoft remote,) so that the inputs from this device will not mingle with those from the primary keyboard, and be available to programs as, say, WinProc messages? I don't want to touch the system supplied class and miniport drivers. Thanks in advance. Tag: Interlocked func in between a Spinlock?! Tag: 86584
  - 3
    - Creating a virtual Port Hi Everyone, I Made a Driver using WINDDK samples. And i was able to add the printer using it. It prints the file fine on the Physical printers ports. Now i want to create a virtual port so that files get printed ( On Disk) So please help me with the following two options 1) i wont to avoid (Print to file port option) .because it pops up the dialog while printing the file and asks for the file name. I want to hide this dialog and it should take the default name send by the driver. OR 2) So can anyone please let me know how do i add virtual printer port. This looks a better solutio to me. Thanks to all Vik Tag: Interlocked func in between a Spinlock?! Tag: 86576
  - 4
    - Is hidclass.sys appropriate for my device? Hi, I am currently involved in a project that involves the design of a proprietary USB device. This device is under design and its purpose is to get configuration information from a PC via USB and transfer that information to an Infrared device. We would also like to be able to read the configuration information that is stored in the device. I had hoped to use the hidclass.sys driver and thus avoid the task of writing a device driver. I am finding out as I go along that the report may be limited to 4 bytes of data, our configuration information is 32 bytes. Would you recommend continuing along this path and writing multiple reports to get the full configuration to/from the PC or could you recommend another driver or maybe a Minidriver ?? Thanks, Stacy Tag: Interlocked func in between a Spinlock?! Tag: 86560
  - 5
    - Help With NDIS WHQL/Logo Process I have a NDIS driver that works great. I'm just want to install it without getting the prompts about Windows Logo Testing. I have been attempting to read through the documents from Microsoft on logo testing and WHQL but am getting lost in the multiple hundred page documents they provide. What I am looking for is an ordered list that I can follow that will explain what I need to do to get it completed. I found a page from Microsoft that has something like this but that is where it tells to download document after document...and that it is before I even have to buy a certificate. I also don't want to purchase a certificate and then find out that I can't do it with my product or I have to implement a bunch of features that I don't need just to conform to Microsoft's specification. If anyone can provide some guidance or has experience doing this with an NDIS driver that would be great. We may even be willing to pay for some consulting services that can perform this task for us. Thanks, Tim C. Tag: Interlocked func in between a Spinlock?! Tag: 86559
  - 6
    - Terminal Server Driver I need to make our printer driver Terminal Server compliant. I searched the web but can't find any information on how to make a printer driver compliant with the multi-user environment of a Terminal Server. Can any point to documents, web sites regarding developing printer drivers for terminal servers? Tag: Interlocked func in between a Spinlock?! Tag: 86558
  - 7
    - KMDF and Smart card reader driver Hello, I want to develop a specific smart card reader driver. I would like to know if I can use KMDF? I have doubt specially with the function SmartcardDeviceControl which completes IRP. Once SmartcardDeviceControl is called, is there a way to the framework KMDF to know if the request is still available and a way to destroy this request on framework point of view. Thanks for your answers Tag: Interlocked func in between a Spinlock?! Tag: 86557
  - 8
    - Multiple threads and blocking on I/O Hi all, Let's say I have two threads one of which calls ReadFile and the other WriteFile (on the same handle). Using non-overlapped I/O, will the threads block one another? Thanks, Chris Tag: Interlocked func in between a Spinlock?! Tag: 86553
  - 9
    - File Attributes Notification Hello All, I do not whether it is right to post my question in this group. I want to run my application as a service which gets the notification when ever a particular file is modified or created (eg. c:\tempfile.txt). When ever this file is created or modified my application should get the notification. Can it be possible from an application, if so, are there any calls to get the notification? or Do i need to write a file system driver to achieve my goal? Any suggestions would be greatly appreciated. Thank You. Regards, Sushma Tag: Interlocked func in between a Spinlock?! Tag: 86548
  - 10
    - Installation of Printer Driver Hi I have made a utility to install a printer driver in XP for my printer. When I connect my printer with my PC ,it shows a pop up "NEW HARDWARE FOUND" even when the driver is already installed using my utility. But when I connect my printer with my PC, it doesnot shows any pop up when the driver is already installed using ADD PRINTER OPTION in the Printer and Faxes in the Control Panel. Please reply ASAP. Thanks and Regards Gautam Seth Tag: Interlocked func in between a Spinlock?! Tag: 86547
  - 11
    - Calling a DLL in Virtual Driver Hi All, I want to know whether, I can use LoadLibrary() and GetProcAddress() API function calls so as to perform some read write tasks. I have a Dll Which performs printing task. I want this dll call to be used in my Virtual Drivers. Is it possible to use directly or there is some other way around to perform this task. I want to use this dll calls when write Request will arrive to the virtual Driver. Please help me out, Thank you, waiting for experts advice. Tag: Interlocked func in between a Spinlock?! Tag: 86546
  - 12
    - DiskPerf conflicts with PartMgr? DiskPerf conflicts with PartMgr? I manually install the DDK sample driver diskperf by performing the following steps: 1), Copy diskperf.sys to c:\windows\system32\drivers\ 2), Modify the registry as follows: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}] ; This entry is for DiskDrive "UpperFilters"="diskperf PartMgr" ; PartMgr is another upperfilter [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\diskperf] "ErrorControl"=dword:00000001 "Start"=dword:00000000 "Type"=dword:00000001 "Group"="PnP Filter" ; I tried "System Bus Extender" and "Filter" 3) reboot 4) I get a BSOD. ;( To my surprise, if I remove the other upperfilter PartMgr from the registry like this: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}] "UpperFilters"="diskperf" and reboot, then, everything is OK. Why? I wonder if the two upperfilters conflicts with each other? Or this is because of other factors. Who can tell me? Any help will be highly appreciated. Thanks in advance. Tag: Interlocked func in between a Spinlock?! Tag: 86542
  - 13
    - Order of packets by MiniportReturnPacket Hi All, I have a query, regarding the order of packets returned by Ndis to Miniport driver through MiniportReturnPacket handler. Does it return in the same order, in which we indicate to NDIS? Regards, Chiranjeevi. Tag: Interlocked func in between a Spinlock?! Tag: 86541
  - 14
    - Output to Second Display Assuming two display cards and two monitors, if I want to display something on the second monitor, the only way I found is to check "Extend my Windows desktop to this monitor" option in the settings. Is it possible to create a separate desktop on the second monitor? I couldn't get a solution from the Windows UI forum. It seems that there isn't a solution from the Windows API. I am wondering if there is a device driver solution. Thanks Tag: Interlocked func in between a Spinlock?! Tag: 86540
  - 15
    - Signaling events I'm creating an event (s) as follows: EventsFile = CreateEvent( NULL, // lpEventAttributes FALSE, // bManualReset FALSE, // bInitialState L"NewQueuedFile" // use WinObj to view named events for DBG NULL #endif ); And this works fine. I'm waiting for it and other events as follows: DWORD FiredEvent = WaitForMultipleObjects(sizeof(ActivityEventDefinition)/sizeof(HANDLE) ,&Event.NewQueuedFile,FALSE,INFINITE); And this seems to work as well. My question is : If an event is set 2 times before I return from the Wait, will I get a response back from both? That is, does each KeSetEvent() count. If the event is set N times before I handle it, will 1 return cause all the Events to be reset. If so, what mechanism should I use so that I don't lose any Events. Thanks. -- Gak - Finecats Tag: Interlocked func in between a Spinlock?! Tag: 86536
  - 16
    - Help : Is it possible to develop an INF to install the null-modem To anyone out there who can help Is it possible to create an INF that installs the null-modem driver that ships with Windows? We have a device that uses the USB-Serial cable, and I've manage to install it as a serial port (using the FTDI drivers). The next step is to then install the null-modem in Windows that refers to this port. I've developed an app that then creates a PPP connection that allows our device to communicate with the Desktop PC via the null-modem over USB-Serial cable. I would very much appreciate any help or suggestion. TIA Chris Tag: Interlocked func in between a Spinlock?! Tag: 86535
  - 17
    - IRP reuse contradiction There are some other statements in the "Completing IRPs" section of the DDK documentation that seem to contradict each other about IRP reuse. One says that an IoCompletion routine can be used "To reuse an incoming IRP to request that lower drivers complete some number of operations, such as partial transfers, until the original request can be satisfied and completed by the IoCompletion routine." Another says that "Drivers must not attempt to reuse IRPs issued by the I/O manager." (and that only raw memory or IRPs created by IoAllocateIrp can be reused) Since any incoming IRP could be from the I/O manager, which one of these statements is right? Also, is reusing an IRP the same as retrying an IRP on failure in the sense that it requires IoReuseIrp or IoInitializeIrp to be used, or is manually resetting the status fields enough? Tag: Interlocked func in between a Spinlock?! Tag: 86524
  - 18
    - nonPNP sample driver won't install when running .exe Hi I'm trying to get the nonPNP sample driver to run and get the following error in the console: C:\WINDDK\WDF\KMDF10\src\kmdf\nonpnp\exe\objchk_wxp_x86\i386>nonpnpapp.exe No version specified. Using default version:01001 Unable to install driver. OpenService failed! Error = 1060 OpenService failed! Error = 1060 Is there a problem with this sample or is the documentation just unclear for getting it to work. Thanks, Tom Tag: Interlocked func in between a Spinlock?! Tag: 86521
  - 19
    - send USB vender specific control command using umdf I am using umdf rc1 on vista x86 rc1. After I send a vender defined control command to the device expecting a ULONG returned, the IWDFIoRequest->Send() with synchonous method return S_OK, IWDFRequestCompletionParams->GetCompletionStatus() also return S_OK. So it seems the the control command have been sent to the device, and the device completed the operation. But the IWDFRequestCompletionParams->GetInformation() return 0, which is expected to return sizeof(ULONG) for this control command and the output buffer is not updated. I have an old WMD driver for the same device, and with the same control command, it returnd a ULONG. What would be the problem? Can it be that the device never reveives the command? or the device dose receive the command, but fails to execute the command, and therefore not returning a ULONG? I have working on this for quite a few days and not able to figure it out. I desperately need help. Tag: Interlocked func in between a Spinlock?! Tag: 86520
  - 20
    - Current IRP: time out or cancel? I previously thought canceling the current (not queued) IRP would only be a nifty feature, but recently I was thinking that if the IRP is a request for input from a device like a keyboard or serial port then it may never receive any more input for minutes or hours. Wouldn't it be a problem for that current IRP to be hung up for such a long time? When I searched a little about this, I read that cancellation of the current IRP is usually not supported and time out is used instead. Is it really appropriate for a driver to be making such policy decisions? What if an application wants to wait forever for new data until it exits? (at which point it would want to cancel the operation in progress and have the driver graceful reset its device) Tag: Interlocked func in between a Spinlock?! Tag: 86515
  - 21
    - Registering 32-bit DLLs for 64-bit drivers Here's an interesting question that I haven't seen covered anywhere. We have a DLL that implements a COM interface to our driver for 3rd party applications. In 64-bit Windows, we need to register both the 32-bit and 64-bit versions of this DLL so that both old, crufty, un-ported 32-bit applications and minty-fresh 64-bit applications can use our API. Getting the 64-bit DLL registered is easily accomplished using a RegisterDLLs section. Is there a mechanism in an INF file to register a 32-bit DLL during a 64-bit install? Or do we need to have our coinstaller do it? Though, that's a bit tricky in itself, since the coinstaller is a 64-bit DLL it probably has to call the 32-bit rundll32 to do that... (and... I'd really like to get rid of the coinstaller entirely if possible... the trickiness of Vista running part of it in the user's session and part in session 0 looks like it's just asking for bugs to creep in). -- Ray Tag: Interlocked func in between a Spinlock?! Tag: 86510
  - 22
    - Memory Mapped IO Read Write Hi I have PCI NIC card. This crad does not have Port reange. This card is having only memory mapped region. I used NdisMMapIoSpace api in order to get virtual address. I want to read and write somthing on Virtual Address. Does NDIS support any apis for it or there is any special way? -- With regards thanks Anand Choubey Tag: Interlocked func in between a Spinlock?! Tag: 86505
  - 23
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Hi!

Is there any reason to use interlocked functions in between a spinlock?

Thanks,
greg1x

Re: Interlocked func in between a Spinlock?! by Vetzak

Vetzak
Mon Oct 09 03:52:18 CDT 2006

greg1x wrote:
> Hi!
>
> Is there any reason to use interlocked functions in between a spinlock?
>
> Thanks,
> greg1x

No.

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Re: Interlocked func in between a Spinlock?! by Don

Don
Mon Oct 09 06:55:53 CDT 2006

If all accesses to the variable being accessed by the interlocked function
are protected by the same spinlock, there is no need. If not everything is
protected by the lock, you need to determine if adding the lock or using
interlocked makes more sense. If adding the lock is hard due to lock
heirarchies and IRQL then keep the interlocked function, just use it
everywhere.

--
Don Burn (MVP, Windows DDK)
Windows 2k/XP/2k3 Filesystem and Driver Consulting
http://www.windrvr.com
Remove StopSpam from the email to reply

"greg1x" <greg1x@yahoo.com> wrote in message
news:806e5$4529f177$50637264$25627@news.chello.hu...
> Hi!
>
> Is there any reason to use interlocked functions in between a spinlock?
>
> Thanks,
> greg1x
>
>

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Re: Interlocked func in between a Spinlock?! by greg1x

greg1x
Mon Oct 09 07:03:55 CDT 2006

Thanks Vetzak and Don.
I don't need it then. ;)

Regards,
greg1x

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