Module org.postgresql.pljava.internal

Package org.postgresql.pljava.internal

Class DualState.SingleSPIcursorClose<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.SingleSPIcursorClose<T>

Enclosing class:

DualState<T>

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

A DualState subclass whose only native resource releasing action needed is SPI_cursor_close of a single pointer.

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	SingleSPIcursorClose(DualState.Key cookie, T referent, long resourceOwner, long ccTarget)

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, an SPI_cursor_close call is made so the native memory is released without having to wait for release of its containing 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

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleSPIcursorClose

protected SingleSPIcursorClose(DualState.Key cookie,
                               T referent,
                               long resourceOwner,
                               long ccTarget)

Method Detail

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, an SPI_cursor_close call is made so the native memory is released without having to wait for release of its containing context.

For this class (and for reasons that weren't made obvious in the original code this reimplements), the native code will avoid calling SPI_cursor_close if the Invocation's error-occurred flag is set, or during a callback from the executor through an ExprContextCallbackFunction.

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").