emacs/java/org/gnu/emacs/EmacsHandleObject.java

55 lines
1.6 KiB
Java

/* Communication module for Android terminals. -*- c-file-style: "GNU" -*-
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
package org.gnu.emacs;
import java.lang.IllegalStateException;
/* This defines something that is a so-called ``handle''. Handles
must be created by C code, and will remain existing until
destroyHandle is called. C code then refers to the handle by a
number which maps into the Java object representing the handle.
All handle operations must be done from the Emacs thread. */
public abstract class EmacsHandleObject
{
/* Whether or not this handle has been destroyed. */
volatile boolean destroyed;
/* The handle associated with this object, set in
android_globalize_reference. */
public long handle;
public void
destroyHandle () throws IllegalStateException
{
synchronized (this)
{
destroyed = true;
}
}
public boolean
isDestroyed ()
{
return destroyed;
}
};