mirror of
https://github.com/nefarius/WDF-Utils.git
synced 2024-09-19 18:49:32 +02:00
61 lines
1.8 KiB
Markdown
61 lines
1.8 KiB
Markdown
|
# RegisterPowerStateChangeCallback
|
||
|
|
|
||
|
|
```c
|
||
|
|
NTSTATUS RegisterPowerStateChangeCallback(_Inout_ DEVICE_EXTENSION* pDeviceExtension)
|
||
|
|
{
|
||
|
|
#if DBG
|
||
|
|
|
||
|
|
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
|
||
|
|
DPFLTR_INFO_LEVEL,
|
||
|
|
" ---> RegisterPowerStateChangeCallback()\n");
|
||
|
|
|
||
|
|
#endif /// DBG
|
||
|
|
|
||
|
|
NT_ASSERT(pDeviceExtension);
|
||
|
|
|
||
|
|
NTSTATUS status = STATUS_SUCCESS;
|
||
|
|
OBJECT_ATTRIBUTES objectAttributes = {0};
|
||
|
|
UNICODE_STRING unicodeString = {0};
|
||
|
|
|
||
|
|
RtlInitUnicodeString(&unicodeString,
|
||
|
|
L"\\Callback\\PowerState");
|
||
|
|
|
||
|
|
InitializeObjectAttributes(&objectAttributes,
|
||
|
|
&unicodeString,
|
||
|
|
OBJ_CASE_INSENSITIVE,
|
||
|
|
0,
|
||
|
|
0);
|
||
|
|
|
||
|
|
status = ExCreateCallback(&(pDeviceExtension->pCallbackObject),
|
||
|
|
&objectAttributes,
|
||
|
|
FALSE, /// Do not create as the system should already have done this
|
||
|
|
TRUE); /// Allow multiple callbacks
|
||
|
|
if(status != STATUS_SUCCESS)
|
||
|
|
{
|
||
|
|
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
|
||
|
|
DPFLTR_ERROR_LEVEL,
|
||
|
|
" !!!! RegisterPowerStateChangeCallback : ExCreateCallback() [status: %#x]\n",
|
||
|
|
status);
|
||
|
|
|
||
|
|
HLPR_BAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
pDeviceExtension->pRegistration = ExRegisterCallback(pDeviceExtension->pCallbackObject,
|
||
|
|
PowerStateCallback,
|
||
|
|
pDeviceExtension);
|
||
|
|
|
||
|
|
HLPR_BAIL_LABEL:
|
||
|
|
|
||
|
|
#if DBG
|
||
|
|
|
||
|
|
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
|
||
|
|
DPFLTR_INFO_LEVEL,
|
||
|
|
" <--- RegisterPowerStateChangeCallback() [status: %#x]\n",
|
||
|
|
status);
|
||
|
|
|
||
|
|
#endif /// DBG
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
```
|