FileChannel.TryLock Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
| TryLock() |
Attempts to acquire an exclusive lock on this channel's file. |
| TryLock(Int64, Int64, Boolean) |
Attempts to acquire a lock on the given region of this channel's file. |
TryLock()
Attempts to acquire an exclusive lock on this channel's file.
[Android.Runtime.Register("tryLock", "()Ljava/nio/channels/FileLock;", "")]
public Java.Nio.Channels.FileLock? TryLock ();[<Android.Runtime.Register("tryLock", "()Ljava/nio/channels/FileLock;", "")>]
member this.TryLock : unit -> Java.Nio.Channels.FileLockReturns
A lock object representing the newly-acquired lock,
or null if the lock could not be acquired
because another program holds an overlapping lock
- Attributes
Exceptions
if the file channel is closed.
if a lock already exists that overlaps this lock request or another thread is waiting to acquire a lock that will overlap with this request.
if any I/O error occurs.
Remarks
Java documentation for java.nio.channels.FileChannel.tryLock().
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Applies to
TryLock(Int64, Int64, Boolean)
Attempts to acquire a lock on the given region of this channel's file.
[Android.Runtime.Register("tryLock", "(JJZ)Ljava/nio/channels/FileLock;", "GetTryLock_JJZHandler")]
public abstract Java.Nio.Channels.FileLock? TryLock (long position, long size, bool shared);[<Android.Runtime.Register("tryLock", "(JJZ)Ljava/nio/channels/FileLock;", "GetTryLock_JJZHandler")>]
abstract member TryLock : int64 * int64 * bool -> Java.Nio.Channels.FileLockParameters
- position
- Int64
The position at which the locked region is to start; must be non-negative
- size
- Int64
The size of the locked region; must be non-negative, and the sum
position + size must be non-negative
- shared
- Boolean
true to request a shared lock,
false to request an exclusive lock
Returns
A lock object representing the newly-acquired lock,
or null if the lock could not be acquired
because another program holds an overlapping lock
- Attributes
Exceptions
if any parameters are invalid.
if the file channel is closed.
if a lock is already held that overlaps this lock request or another thread is waiting to acquire a lock that will overlap with this request.
if any I/O error occurs.
Remarks
Java documentation for java.nio.channels.FileChannel.tryLock(long, long, boolean).
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.