www.pudn.com > PCIÇý¶¯ÊµÀý.zip > CREATE_CLOSE.C

/////////////////////////////////////////////////////////////////////////////// 
// 
//    (C) Copyright 1995 - 1997 OSR Open Systems Resources, Inc. 
//    All Rights Reserved 
// 
//    This sofware is supplied for instructional purposes only. 
// 
//    OSR Open Systems Resources, Inc. (OSR) expressly disclaims any warranty 
//    for this software.  THIS SOFTWARE IS PROVIDED  "AS IS" WITHOUT WARRANTY 
//    OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, 
//    THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS FOR A PARTICULAR 
//    PURPOSE.  THE ENTIRE RISK ARISING FROM THE USE OF THIS SOFTWARE REMAINS 
//    WITH YOU.  OSR's entire liability and your exclusive remedy shall not 
//    exceed the price paid for this material.  In no event shall OSR or its 
//    suppliers be liable for any damages whatsoever (including, without 
//    limitation, damages for loss of business profit, business interruption, 
//    loss of business information, or any other pecuniary loss) arising out 
//    of the use or inability to use this software, even if OSR has been 
//    advised of the possibility of such damages.  Because some states/ 
//    jurisdictions do not allow the exclusion or limitation of liability for 
//    consequential or incidental damages, the above limitation may not apply 
//    to you. 
// 
//    OSR Open Systems Resources, Inc. 
//    105 Route 101A Suite 19 
//    Amherst, NH 03031  (603) 595-6500 FAX: (603) 595-6503 
//    email bugs to: bugs@osr.com 
// 
// 
//    MODULE: 
// 
//        CREATE_CLOSE.C 
// 
//    ABSTRACT: 
// 
//      This file contains the Create and Close dispatch entry points for the  
//      OSR Sample PCI Busmaster DMA device driver. 
// 
//    AUTHOR(S): 
// 
//        OSR Open Systems Resources, Inc. 
//  
//    REVISION:    
// 
// 
/////////////////////////////////////////////////////////////////////////////// 
 
#include "osr-pci.h" 
 
/////////////////////////////////////////////////////////////////////////////// 
// 
//  OsrCreateClose 
// 
//    This is the dispatch entry point for processing both IRP_MJ_CREATE 
//    and IRP_MJ_CLOSE functions.  Since this is a simple device driver, 
//    there's really nothing to do here by complete the requests with success. 
// 
// 
//  INPUTS: 
// 
//      DeviceObject - Address of the DEVICE_OBJECT for our device. 
//   
//      Irp - Address of the IRP representing the IRP_MJ_CREATE or IRP_MJ_CLOSE 
//          call. 
// 
//  OUTPUTS: 
// 
//      None. 
// 
//  RETURNS: 
// 
//    STATUS_SUCCESS.   We never fail this function.         
// 
//  IRQL: 
// 
//      This routine is called at IRQL PASSIVE_LEVEL. 
// 
//  NOTES: 
// 
/////////////////////////////////////////////////////////////////////////////// 
NTSTATUS OsrCreateClose(PDEVICE_OBJECT DeviceObject, PIRP Irp) 
{ 
 
#if DBG 
    DbgPrint("CreateClose: called"); 
#endif 
 
    // 
    // Nothing much to do.... 
    // 
    Irp->IoStatus.Status = STATUS_SUCCESS; 
    Irp->IoStatus.Information = 0; 
 
    IoCompleteRequest(Irp, IO_NO_INCREMENT); 
     
#if DBG 
    DbgPrint("CreateClose: exit"); 
#endif 
 
    return(STATUS_SUCCESS); 
}