IoGetRequestorProcessId function (ntifs.h)
The IoGetRequestorProcessId routine returns the unique 32-bit process ID for the thread that originally requested a given I/O operation.
Syntax
ULONG IoGetRequestorProcessId(
[in] PIRP Irp
);
Parameters
[in] Irp
A pointer to the I/O request packet (IRP) for the specified I/O operation.
Return value
IoGetRequestorProcessId returns the process ID for the thread that requested the I/O operation. If the IRP is not associated with any thread, IoGetRequestorProcessId returns zero.
Remarks
On Microsoft Windows XP and later, IoGetRequestorProcessId returns the process ID for the process to which the thread is currently attached.
On Microsoft Windows 2000 and earlier, IoGetRequestorProcessId returns the process ID for the process that created the thread.
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) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | <= DISPATCH_LEVEL |