apple.iosurface.enums

Class IOSurfaceLockOptions

java.lang.Object

apple.iosurface.enums.IOSurfaceLockOptions

public final class IOSurfaceLockOptions
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	AvoidSync If you want to detect/avoid a potentially expensive paging operation (such as readback from a GPU to system memory) when you lock the buffer, you may include this flag.
static int	ReadOnly If you are not going to modify the data while you hold the lock, you should set this flag to avoid invalidating any existing caches of the buffer contents.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ReadOnly

public static final int ReadOnly

If you are not going to modify the data while you hold the lock, you should set this flag to avoid invalidating any existing caches of the buffer contents. This flag should be passed both to the lock and unlock functions. Non-symmetrical usage of this flag will result in undefined behavior.

See Also:

Constant Field Values

AvoidSync

public static final int AvoidSync

If you want to detect/avoid a potentially expensive paging operation (such as readback from a GPU to system memory) when you lock the buffer, you may include this flag. If locking the buffer requires a readback, the lock will fail with an error return of kIOReturnCannotLock.

See Also:

Constant Field Values