Module org.postgresql.pljava.internal

Package org.postgresql.pljava.internal

Class DualState.SingleMemContextDelete<T>

java.lang.Object

java.lang.ref.Reference<T>

java.lang.ref.WeakReference<T>

org.postgresql.pljava.internal.DualState<T>

org.postgresql.pljava.internal.DualState.SingleGuardedLong<T>

org.postgresql.pljava.internal.DualState.SingleMemContextDelete<T>

Enclosing class:

DualState<T>

public abstract static class DualState.SingleMemContextDelete<T>
extends DualState.SingleGuardedLong<T>

A DualState subclass whose only native resource releasing action needed is MemoryContextDelete of a single context.

This class may get called at the nativeStateReleased entry, not only if the native state is actually being released, but if it is being 'claimed' by native code for its own purposes. The effect is the same as far as Java is concerned; the object is no longer accessible, and the native code is responsible for whatever happens to it next.

Nested Class Summary

Nested classes/interfaces inherited from class org.postgresql.pljava.internal.DualState

DualState.Key, DualState.SingleFreeErrorData<T>, DualState.SingleFreeTupleDesc<T>, DualState.SingleGuardedLong<T>, DualState.SingleHeapFreeTuple<T>, DualState.SingleMemContextDelete<T>, DualState.SinglePfree<T>, DualState.SingleSPIcursorClose<T>, DualState.SingleSPIfreeplan<T>

Field Summary

Fields inherited from class org.postgresql.pljava.internal.DualState

m_resourceOwner

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SingleMemContextDelete(DualState.Key cookie, T referent, long resourceOwner, long memoryContext)

Method Summary

Modifier and Type	Method	Description
String	formatString()	Return a printf format string resembling "%s something(%x)" where the %x will be the value being guarded; the "something" should indicate what the value represents, or what will be done with it when released by Java.
protected void	javaStateUnreachable(boolean nativeStateLive)	When the Java state is released or unreachable, a MemoryContextDelete call is made so the native memory is released without having to wait for release of its parent context.

Methods inherited from class org.postgresql.pljava.internal.DualState.SingleGuardedLong

guardedLong, toString

Methods inherited from class org.postgresql.pljava.internal.DualState

adoptionLock, adoptionUnlock, checkCookie, clear, enqueue, get, identifierForMessage, invalidMessage, invalidSqlState, javaStateReleased, lock, nativeStateReleased, pin, pinnedByCurrentThread, pinUnlessReleased, referent, releasedMessage, releasedSqlState, releaseFromJava, toString, unlock, unlock, unpin

Methods inherited from class java.lang.ref.Reference

clone, isEnqueued, reachabilityFence, refersTo

Methods inherited from class java.lang.Object

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

Constructor Details

SingleMemContextDelete

protected SingleMemContextDelete(DualState.Key cookie,
 T referent,
 long resourceOwner,
 long memoryContext)

Method Details

formatString

public String formatString()

Description copied from class: DualState.SingleGuardedLong

Return a printf format string resembling "%s something(%x)" where the %x will be the value being guarded; the "something" should indicate what the value represents, or what will be done with it when released by Java.

Overrides:

formatString in class DualState.SingleGuardedLong<T>

javaStateUnreachable

protected void javaStateUnreachable(boolean nativeStateLive)

When the Java state is released or unreachable, a MemoryContextDelete call is made so the native memory is released without having to wait for release of its parent context.

Overrides:

javaStateUnreachable in class DualState<T>

Parameters:

nativeStateLive - true is passed if the instance's "native state" is still considered live, that is, no resource-owner callback has been invoked to stamp it invalid (nor has it been "adopted").