Source code of Windows XP (NT5)
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204 lines
8.5 KiB

/*CM_Connect_Machine
CM_Get_Device_ID_List_Size_Ex
CM_Get_Child_Ex
CM_Get_Sibling_Ex
CM_Get_Parent_Ex
CM_Get_DevNode_Registry_Property_Ex
CM_Get_Class_Name_Ex
CM_Get_DevNode_Status_Ex
CM_Get_Device_ID_Ex
CM_Request_Device_Eject_Ex
CM_Locate_DevNode_Ex*/
InitDevTreeDlgProc
DEVINST* DeviceInstance
HMACHINE DeviceTree->hMachine
DEVINST DeviceTree->DevInst
GUID DeviceTreeNode->ClassGuid
TCHAR DeviceID[MAX_DEVICE_ID_LEN]
PTSTR DeviceInterface
//
// Get the root devnode.
//
ConfigRet = CM_Locate_DevNode_Ex(&DeviceTree->DevInst,
NULL,
CM_LOCATE_DEVNODE_NORMAL,
DeviceTree->hMachine (NULL)
);
if (ConfigRet != CR_SUCCESS) {
ConfigRet = CM_Get_Child_Ex(&DeviceInstance, (Out param)
DeviceTree->DevInst, (prev call)
0,
DeviceTree->hMachine (NULL)
);
if (ConfigRet == CR_SUCCESS) {
// for info
ConfigRet = CM_Get_DevNode_Registry_Property_Ex(DeviceInstance, (from above)
CM_DRP_CLASSGUID,
NULL,
&Buffer,
&Len,
0,
DeviceTree->hMachine (NULL)
);
if (ConfigRet == CR_SUCCESS) {
Out: // GUID_DEVCLASS_COMPUTER
{0x4d36e966L, 0xe325, 0x11ce,
{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}},
if (ConfigRet == CR_SUCCESS) {
ConfigRet = CM_Get_Class_Name_Ex(&DeviceTreeNode->ClassGuid,
Buffer,
&Len,
0,
DeviceTree->hMachine
);
Out: Computer
if (ConfigRet == CR_SUCCESS) {
// trying to find drive letter
x DevNodeToDriveLetter(x
x
x if (CM_Get_Device_ID_Ex(DevInst,
x DeviceID,
x sizeof(DeviceID)/sizeof(TCHAR),
x 0,
x NULL
x ) == CR_SUCCESS) {
x Out: 0x0006ee8c "ROOT\ACPI_HAL\0000"
x
x
x if (CM_Get_Device_Interface_List_Size(&ulSize,
x (LPGUID)&VolumeClassGuid,
x DeviceID,
x 0) == CR_SUCCESS) &&
x
x Out: FAILS
x (ulSize > 1) &&
x ((DeviceInterface = LocalAlloc(LPTR, ulSize*sizeof(TCHAR))) != NULL) &&
x (CM_Get_Device_Interface_List((LPGUID)&VolumeClassGuid,
x DeviceID,
x DeviceInterface,
x ulSize,
x 0
x ) == CR_SUCCESS) &&
ConfigRet = CM_Get_DevNode_Registry_Property_Ex(DeviceInstance,
CM_DRP_FRIENDLYNAME,
NULL,
Buffer,
&Len,
0,
DeviceTree->hMachine
);
then, CM_DRP_DEVICEDESC... out: "Advanced Configuration and Power Interface (ACPI) PC"
....
BuildLocationInformation: Boring....
// Get InstanceId
ConfigRet = CM_Get_Device_ID_ExW(DeviceInstance,
Buffer,
Len/sizeof(TCHAR),
0,
DeviceTree->hMachine
);
Out "ROOT\ACPI_HAL\0000"
{ // should skip
BuildDeviceRelationsList
ConfigRet = CM_Get_Device_ID_List_Size_Ex(&Len,
DeviceId, ("ROOT\ACPI_HAL\0000")
FilterFlag, (CM_GETIDLIST_FILTER_EJECTRELATIONS)
hMachine (NULL)
);
BuildDeviceRelationsList
ConfigRet = CM_Get_Device_ID_List_Size_Ex(&Len,
DeviceId, ("ROOT\ACPI_HAL\0000")
FilterFlag, (CM_GETIDLIST_FILTER_REMOVALRELATIONS)
hMachine
);
// Both FAILED, if would have succeeded, would have trierd to enum drive letters
}
// If this devinst has children, then recurse to fill in its child sibling list.
ConfigRet = CM_Get_Child_Ex(&ChildDeviceInstance, (out param)
DeviceInstance, (same as above)
0,
DeviceTree->hMachine (NULL)
);
//recurse to redo the same as above for child, then ...
// Next sibling ...
ConfigRet = CM_Get_Sibling_Ex(&DeviceInstance, (Ouch!)
DeviceInstance,
0,
DeviceTree->hMachine
);
///////////////////////////////////////////////////////////////////////////////
//
// Device Instance status flags, returned by call to CM_Get_DevInst_Status
//
#define DN_ROOT_ENUMERATED (0x00000001) // Was enumerated by ROOT
#define DN_DRIVER_LOADED (0x00000002) // Has Register_Device_Driver
#define DN_ENUM_LOADED (0x00000004) // Has Register_Enumerator
#define DN_STARTED (0x00000008) // Is currently configured
#define DN_MANUAL (0x00000010) // Manually installed
#define DN_NEED_TO_ENUM (0x00000020) // May need reenumeration
#define DN_NOT_FIRST_TIME (0x00000040) // Has received a config
#define DN_HARDWARE_ENUM (0x00000080) // Enum generates hardware ID
#define DN_LIAR (0x00000100) // Lied about can reconfig once
#define DN_HAS_MARK (0x00000200) // Not CM_Create_DevInst lately
#define DN_HAS_PROBLEM (0x00000400) // Need device installer
#define DN_FILTERED (0x00000800) // Is filtered
#define DN_MOVED (0x00001000) // Has been moved
#define DN_DISABLEABLE (0x00002000) // Can be rebalanced
#define DN_REMOVABLE (0x00004000) // Can be removed
#define DN_PRIVATE_PROBLEM (0x00008000) // Has a private problem
#define DN_MF_PARENT (0x00010000) // Multi function parent
#define DN_MF_CHILD (0x00020000) // Multi function child
#define DN_WILL_BE_REMOVED (0x00040000) // DevInst is being removed
// Flags for CM_Get_Device_ID_List, CM_Get_Device_ID_List_Size
//
#define CM_GETIDLIST_FILTER_NONE (0x00000000)
#define CM_GETIDLIST_FILTER_ENUMERATOR (0x00000001)
#define CM_GETIDLIST_FILTER_SERVICE (0x00000002)
#define CM_GETIDLIST_FILTER_EJECTRELATIONS (0x00000004)
#define CM_GETIDLIST_FILTER_REMOVALRELATIONS (0x00000008)
#define CM_GETIDLIST_FILTER_POWERRELATIONS (0x00000010)
#define CM_GETIDLIST_FILTER_BUSRELATIONS (0x00000020)
#define CM_GETIDLIST_DONOTGENERATE (0x10000040)
#define CM_GETIDLIST_FILTER_BITS (0x1000007F)
//
// Flags for CM_Get_Device_Interface_List, CM_Get_Device_Interface_List_Size
//
#define CM_GET_DEVICE_INTERFACE_LIST_PRESENT (0x00000000) // only currently 'live' device interfaces
#define CM_GET_DEVICE_INTERFACE_LIST_ALL_DEVICES (0x00000001) // all registered device interfaces, live or not
#define CM_GET_DEVICE_INTERFACE_LIST_BITS (0x00000001)