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The KeUnstackDetachProcess routine detaches the current thread from the address space of a process and restores the previous attach state.
Caution Use this routine with extreme caution. (See the following Remarks section.)
Syntax
void KeUnstackDetachProcess(
[in] PRKAPC_STATE ApcState
);
Parameters
[in] ApcState
Opaque pointer to a KAPC_STATE structure that was returned from a previous call to KeStackAttachProcess.
Return value
None
Remarks
Every successful call to KeStackAttachProcess must be matched by a subsequent call to KeUnstackDetachProcess.
Note Attaching a thread to a different process can prevent asynchronous I/O operations from completing and can potentially cause deadlocks. In general, the lines of code between the call to
KeStackAttachProcess
and the call to
KeUnstackDetachProcess
should be very simple and should not call complex routines or send IRPs to other drivers.
For more information about using system threads and managing synchronization within a nonarbitrary thread context, see Driver Threads, Dispatcher Objects, and Resources.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 |
| Target Platform | Universal |
| Header | ntifs.h (include Ntifs.h, Fltkernel.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | < DISPATCH_LEVEL |