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* Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.font;
/*
* This keeps track of data that needs to be cleaned up once a
* strike is freed.
* a) The native memory that is the glyph image cache.
* b) removing the "desc" key from the strike's map.
* This is safe to do because this disposer is invoked only when the
* reference object has been cleared, which means the value indexed by
* this key is just an empty reference object.
* It is possible that a new FontStrike has been created that would
* be referenced by the same (equals) key. If it is placed in the map
* before this disposer is executed, then we do not want to remove that
* object. We should only remove an object where the value is null.
* So we first verify that the key still points to a cleared reference.
* Updates to the map thus need to be synchronized.
*
* A WeakHashmap will automatically clean up, but we might maintain a
* reference to the "desc" key in the FontStrike (value) which would
* prevent the keys from being discarded. And since the strike is the only
* place is likely we would maintain such a strong reference, then the map
* entries would be removed much more promptly than we need.
*/
class NativeStrikeDisposer extends FontStrikeDisposer {
long pNativeScalerContext;
public NativeStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
long pContext, int[] images) {
super(font2D, desc, 0L, images);
pNativeScalerContext = pContext;
}
public NativeStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
long pContext, long[] images) {
super(font2D, desc, 0L, images);
pNativeScalerContext = pContext;
}
public NativeStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
long pContext) {
super(font2D, desc, 0L);
pNativeScalerContext = pContext;
}
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