IDirectWriterLock interface (objidl.h)

The IDirectWriterLock interface enables a single writer to obtain exclusive write access to a root storage object opened in direct mode while allowing concurrent access by multiple readers. This single-writer, multiple-reader mode does not require the overhead of making a snapshot copy of the storage for the readers.


The IDirectWriterLock interface inherits from the IUnknown interface. IDirectWriterLock also has these types of members:


The IDirectWriterLock interface has these methods.

Method Description
IDirectWriterLock::HaveWriteAccess The HaveWriteAccess method indicates whether the write lock has been taken.
IDirectWriterLock::ReleaseWriteAccess The ReleaseWriteAccess method releases the write lock previously obtained.
IDirectWriterLock::WaitForWriteAccess The WaitForWriteAccess method obtains exclusive write access to a storage object.


Minimum supported client Windows 2000 Professional [desktop apps | UWP apps]
Minimum supported server Windows 2000 Server [desktop apps | UWP apps]
Target Platform Windows
Header objidl.h

See also