AsynchronousFileChannel.TryLock Method
Definition
Important
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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;", "", ApiSince=26)]
public Java.Nio.Channels.FileLock? TryLock ();[<Android.Runtime.Register("tryLock", "()Ljava/nio/channels/FileLock;", "", ApiSince=26)>]
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
Remarks
Attempts to acquire an exclusive lock on this channel's file.
An invocation of this method of the form ch.tryLock() behaves in exactly the same way as the invocation
ch.{@link #tryLock(long,long,boolean) tryLock}(0L, Long.MAX_VALUE, false)
Java documentation for java.nio.channels.AsynchronousFileChannel.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", ApiSince=26)]
public abstract Java.Nio.Channels.FileLock? TryLock (long position, long size, bool shared);[<Android.Runtime.Register("tryLock", "(JJZ)Ljava/nio/channels/FileLock;", "GetTryLock_JJZHandler", ApiSince=26)>]
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
Remarks
Attempts to acquire a lock on the given region of this channel's file.
This method does not block. An invocation always returns immediately, either having acquired a lock on the requested region or having failed to do so. If it fails to acquire a lock because an overlapping lock is held by another program then it returns null. If it fails to acquire a lock for any other reason then an appropriate exception is thrown.
Java documentation for java.nio.channels.AsynchronousFileChannel.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.