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com.kenai.jffi

public final Class ClosureMagazine

extends Object
Class Inheritance
Imports
java.util.concurrent.atomic.AtomicBoolean, .AtomicIntegerFieldUpdater, java.util.logging.Level, .Logger

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static class

Field Summary

Modifier and TypeField and Description
private final CallContext
callContext

keep a reference to the call context, to avoid GC whilst the magazine is in use

private volatile int
private final Foreign
foreign

A handle to the foreign interface to keep it alive as long as this object is alive

private final long
private static final AtomicIntegerFieldUpdater<ClosureMagazine>

Constructor Summary

AccessConstructor and Description
pack-priv
ClosureMagazine(Foreign foreign, CallContext callContext, long magazineAddress)

Method Summary

Modifier and TypeMethod and Description
public Closure.Handle
public void
protected void
finalize()

Overrides java.lang.Object.finalize.

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
Inherited from java.lang.Object:
cloneequalsgetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

callContextback to summary
private final CallContext callContext

keep a reference to the call context, to avoid GC whilst the magazine is in use

Annotations
@SuppressWarnings:FieldCanBeLocal, UnusedDeclaration
disposedback to summary
private volatile int disposed
foreignback to summary
private final Foreign foreign

A handle to the foreign interface to keep it alive as long as this object is alive

Annotations
@SuppressWarnings:FieldCanBeLocal, UnusedDeclaration
magazineAddressback to summary
private final long magazineAddress
UPDATERback to summary
private static final AtomicIntegerFieldUpdater<ClosureMagazine> UPDATER

Constructor Detail

ClosureMagazineback to summary
pack-priv ClosureMagazine(Foreign foreign, CallContext callContext, long magazineAddress)

Method Detail

allocateback to summary
public Closure.Handle allocate(Object proxy)
disposeback to summary
public void dispose()
finalizeback to summary
protected void finalize() throws Throwable

Overrides java.lang.Object.finalize.

Doc from java.lang.Object.finalize.

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize method to dispose of system resources or to perform other cleanup.

When running in a Java virtual machine in which finalization has been disabled or removed, the garbage collector will never call finalize(). In a Java virtual machine in which finalization is enabled, the garbage collector might call finalize only after an indefinite delay.

The general contract of finalize is that it is invoked if and when the Java virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.

The Java programming language does not guarantee which thread will invoke the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The finalize method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the finalize method causes the finalization of this object to be halted, but is otherwise ignored.

Annotations
@Override
Exceptions
Throwable:
the Exception raised by this method
com.kenai.jffi back to summary

private final Class ClosureMagazine.Handle

extends Object
implements Handle
Class Inheritance
All Implemented Interfaces
com.kenai.jffi.Closure.Handle

Field Summary

Modifier and TypeField and Description
private final long
private final long
private final ClosureMagazine

Constructor Summary

AccessConstructor and Description
private
Handle(ClosureMagazine magazine, long closureAddress, long codeAddress)

Method Summary

Modifier and TypeMethod and Description
public void
dispose()

Implements com.kenai.jffi.Closure.Handle.dispose.

Releases the closure memory back to the operating system.
public void
public long
getAddress()

Implements com.kenai.jffi.Closure.Handle.getAddress.

Gets the native code address of the closure.
public void
setAutoRelease(boolean
If true, the closure memory is automatically managed, else the closure memory must be explicitly freed.
autorelease
)

Implements com.kenai.jffi.Closure.Handle.setAutoRelease.

Sets whether the closure memory should be released when the Handle is garbage collected or not.
Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

closureAddressback to summary
private final long closureAddress
codeAddressback to summary
private final long codeAddress
magazineback to summary
private final ClosureMagazine magazine

Constructor Detail

Handleback to summary
private Handle(ClosureMagazine magazine, long closureAddress, long codeAddress)

Method Detail

disposeback to summary
public void dispose()

Implements com.kenai.jffi.Closure.Handle.dispose.

Doc from com.kenai.jffi.Closure.Handle.dispose.

Releases the closure memory back to the operating system. Although the closure trampoline memory will normally be released when the Handle is garbage collected, this may not happen for some time, and is non-deterministic. This allows explicit control over memory reclamation.

freeback to summary
public void free()

Implements com.kenai.jffi.Closure.Handle.free.

getAddressback to summary
public long getAddress()

Implements com.kenai.jffi.Closure.Handle.getAddress.

Doc from com.kenai.jffi.Closure.Handle.getAddress.

Gets the native code address of the closure. This can be passed into a native function that takes a function pointer.

Returns:long

The native address of the closure code.

setAutoReleaseback to summary
public void setAutoRelease(boolean autorelease)

Implements com.kenai.jffi.Closure.Handle.setAutoRelease.

Doc from com.kenai.jffi.Closure.Handle.setAutoRelease.

Sets whether the closure memory should be released when the Handle is garbage collected or not.

Parameters
autorelease:boolean

If true, the closure memory is automatically managed, else the closure memory must be explicitly freed.