FsRtlFastUnlockSingle function (ntifs.h)
The FsRtlFastUnlockSingle routine releases a byte-range lock that was acquired by the specified process, with the specified key value, file offset, and length, for a file.
Syntax
NTSTATUS FsRtlFastUnlockSingle(
[in] PFILE_LOCK FileLock,
[in] PFILE_OBJECT FileObject,
[in] LARGE_INTEGER *FileOffset,
[in] PLARGE_INTEGER Length,
[in] PEPROCESS ProcessId,
[in] ULONG Key,
[in, optional] PVOID Context,
[in] BOOLEAN AlreadySynchronized
);
Parameters
[in] FileLock
A pointer to the FILE_LOCK structure for the file. This structure must have been initialized by a previous call to FsRtlAllocateFileLock or FsRtlInitializeFileLock.
[in] FileObject
A pointer to the file object for the file.
[in] FileOffset
A pointer to a variable that specifies the starting byte offset within the file of the range to be unlocked.
[in] Length
A pointer to a variable that specifies the length, in bytes, of the range to be unlocked.
[in] ProcessId
A pointer to the process ID for the process.
[in] Key
The key for the byte-range lock.
[in, optional] Context
An optional context pointer to be used when completing IRPs.
[in] AlreadySynchronized
This parameter is obsolete, but is retained for compatibility with legacy drivers.
Return value
The FsRtlFastUnlockSingle routine returns STATUS_SUCCESS or an error status code such as STATUS_RANGE_NOT_LOCKED.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 |
| Target Platform | Universal |
| Header | ntifs.h (include FltKernel.h, Ntifs.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | <= APC_LEVEL |
| DDI compliance rules | HwStorPortProhibitedDDIs(storport) |