Initial import of ObjectPool project
This commit is contained in:
commit
09350d01a8
|
@ -0,0 +1,6 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<classpath>
|
||||||
|
<classpathentry kind="src" path="src"/>
|
||||||
|
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
|
||||||
|
<classpathentry kind="output" path="classes"/>
|
||||||
|
</classpath>
|
|
@ -0,0 +1 @@
|
||||||
|
/classes/
|
|
@ -0,0 +1,17 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<projectDescription>
|
||||||
|
<name>ObjectPool</name>
|
||||||
|
<comment></comment>
|
||||||
|
<projects>
|
||||||
|
</projects>
|
||||||
|
<buildSpec>
|
||||||
|
<buildCommand>
|
||||||
|
<name>org.eclipse.jdt.core.javabuilder</name>
|
||||||
|
<arguments>
|
||||||
|
</arguments>
|
||||||
|
</buildCommand>
|
||||||
|
</buildSpec>
|
||||||
|
<natures>
|
||||||
|
<nature>org.eclipse.jdt.core.javanature</nature>
|
||||||
|
</natures>
|
||||||
|
</projectDescription>
|
|
@ -0,0 +1,15 @@
|
||||||
|
- Dorkbox ObjectPool - Apache 2.0 License
|
||||||
|
https://github.com/dorkbox
|
||||||
|
Copyright 2014, dorkbox, llc
|
||||||
|
Fast (via unsafe) and compatible java object pool factory
|
||||||
|
|
||||||
|
|
||||||
|
- FastObjectPool - Apache 2.0 License
|
||||||
|
http://ashkrit.blogspot.com/2013/05/lock-less-java-object-pool.html
|
||||||
|
https://github.com/ashkrit/blog/tree/master/FastObjectPool
|
||||||
|
Copyright 2013, Ashkrit
|
||||||
|
|
||||||
|
|
||||||
|
- Furious ObjectPool - Apache 2.0 License
|
||||||
|
https://code.google.com/p/furious-objectpool/
|
||||||
|
Copyright Eddie Raapoto, 2012
|
|
@ -0,0 +1,218 @@
|
||||||
|
Apache License
|
||||||
|
Version 2.0, January 2004
|
||||||
|
http://www.apache.org/licenses/
|
||||||
|
|
||||||
|
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||||
|
|
||||||
|
1. Definitions.
|
||||||
|
|
||||||
|
"License" shall mean the terms and conditions for use, reproduction,
|
||||||
|
and distribution as defined by Sections 1 through 9 of this document.
|
||||||
|
|
||||||
|
"Licensor" shall mean the copyright owner or entity authorized by
|
||||||
|
the copyright owner that is granting the License.
|
||||||
|
|
||||||
|
Permission is hereby granted, free of charge, to any person obtaining a
|
||||||
|
copy of this software and associated documentation files (the "Software"),
|
||||||
|
to deal in the Software without restriction, including without limitation
|
||||||
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||||||
|
and/or sell copies of the Software, and to permit persons to whom the
|
||||||
|
Software is furnished to do so, subject to the following conditions:
|
||||||
|
|
||||||
|
The above copyright notice and this permission notice shall be included
|
||||||
|
in all copies or substantial portions of the Software.
|
||||||
|
|
||||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||||
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||||
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||||||
|
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||||
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||||
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||||
|
DEALINGS IN THE SOFTWARE.
|
||||||
|
"Legal Entity" shall mean the union of the acting entity and all
|
||||||
|
other entities that control, are controlled by, or are under common
|
||||||
|
control with that entity. For the purposes of this definition,
|
||||||
|
"control" means (i) the power, direct or indirect, to cause the
|
||||||
|
direction or management of such entity, whether by contract or
|
||||||
|
otherwise, or (ii) ownership of fifty percent (50%) or more of the
|
||||||
|
outstanding shares, or (iii) beneficial ownership of such entity.
|
||||||
|
|
||||||
|
"You" (or "Your") shall mean an individual or Legal Entity
|
||||||
|
exercising permissions granted by this License.
|
||||||
|
|
||||||
|
"Source" form shall mean the preferred form for making modifications,
|
||||||
|
including but not limited to software source code, documentation
|
||||||
|
source, and configuration files.
|
||||||
|
|
||||||
|
"Object" form shall mean any form resulting from mechanical
|
||||||
|
transformation or translation of a Source form, including but
|
||||||
|
not limited to compiled object code, generated documentation,
|
||||||
|
and conversions to other media types.
|
||||||
|
|
||||||
|
"Work" shall mean the work of authorship, whether in Source or
|
||||||
|
Object form, made available under the License, as indicated by a
|
||||||
|
copyright notice that is included in or attached to the work
|
||||||
|
(an example is provided in the Appendix below).
|
||||||
|
|
||||||
|
"Derivative Works" shall mean any work, whether in Source or Object
|
||||||
|
form, that is based on (or derived from) the Work and for which the
|
||||||
|
editorial revisions, annotations, elaborations, or other modifications
|
||||||
|
represent, as a whole, an original work of authorship. For the purposes
|
||||||
|
of this License, Derivative Works shall not include works that remain
|
||||||
|
separable from, or merely link (or bind by name) to the interfaces of,
|
||||||
|
the Work and Derivative Works thereof.
|
||||||
|
|
||||||
|
"Contribution" shall mean any work of authorship, including
|
||||||
|
the original version of the Work and any modifications or additions
|
||||||
|
to that Work or Derivative Works thereof, that is intentionally
|
||||||
|
submitted to Licensor for inclusion in the Work by the copyright owner
|
||||||
|
or by an individual or Legal Entity authorized to submit on behalf of
|
||||||
|
the copyright owner. For the purposes of this definition, "submitted"
|
||||||
|
means any form of electronic, verbal, or written communication sent
|
||||||
|
to the Licensor or its representatives, including but not limited to
|
||||||
|
communication on electronic mailing lists, source code control systems,
|
||||||
|
and issue tracking systems that are managed by, or on behalf of, the
|
||||||
|
Licensor for the purpose of discussing and improving the Work, but
|
||||||
|
excluding communication that is conspicuously marked or otherwise
|
||||||
|
designated in writing by the copyright owner as "Not a Contribution."
|
||||||
|
|
||||||
|
"Contributor" shall mean Licensor and any individual or Legal Entity
|
||||||
|
on behalf of whom a Contribution has been received by Licensor and
|
||||||
|
subsequently incorporated within the Work.
|
||||||
|
|
||||||
|
2. Grant of Copyright License. Subject to the terms and conditions of
|
||||||
|
this License, each Contributor hereby grants to You a perpetual,
|
||||||
|
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||||
|
copyright license to reproduce, prepare Derivative Works of,
|
||||||
|
publicly display, publicly perform, sublicense, and distribute the
|
||||||
|
Work and such Derivative Works in Source or Object form.
|
||||||
|
|
||||||
|
3. Grant of Patent License. Subject to the terms and conditions of
|
||||||
|
this License, each Contributor hereby grants to You a perpetual,
|
||||||
|
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||||
|
(except as stated in this section) patent license to make, have made,
|
||||||
|
use, offer to sell, sell, import, and otherwise transfer the Work,
|
||||||
|
where such license applies only to those patent claims licensable
|
||||||
|
by such Contributor that are necessarily infringed by their
|
||||||
|
Contribution(s) alone or by combination of their Contribution(s)
|
||||||
|
with the Work to which such Contribution(s) was submitted. If You
|
||||||
|
institute patent litigation against any entity (including a
|
||||||
|
cross-claim or counterclaim in a lawsuit) alleging that the Work
|
||||||
|
or a Contribution incorporated within the Work constitutes direct
|
||||||
|
or contributory patent infringement, then any patent licenses
|
||||||
|
granted to You under this License for that Work shall terminate
|
||||||
|
as of the date such litigation is filed.
|
||||||
|
|
||||||
|
4. Redistribution. You may reproduce and distribute copies of the
|
||||||
|
Work or Derivative Works thereof in any medium, with or without
|
||||||
|
modifications, and in Source or Object form, provided that You
|
||||||
|
meet the following conditions:
|
||||||
|
|
||||||
|
(a) You must give any other recipients of the Work or
|
||||||
|
Derivative Works a copy of this License; and
|
||||||
|
|
||||||
|
(b) You must cause any modified files to carry prominent notices
|
||||||
|
stating that You changed the files; and
|
||||||
|
|
||||||
|
(c) You must retain, in the Source form of any Derivative Works
|
||||||
|
that You distribute, all copyright, patent, trademark, and
|
||||||
|
attribution notices from the Source form of the Work,
|
||||||
|
excluding those notices that do not pertain to any part of
|
||||||
|
the Derivative Works; and
|
||||||
|
|
||||||
|
(d) If the Work includes a "NOTICE" text file as part of its
|
||||||
|
distribution, then any Derivative Works that You distribute must
|
||||||
|
include a readable copy of the attribution notices contained
|
||||||
|
within such NOTICE file, excluding those notices that do not
|
||||||
|
pertain to any part of the Derivative Works, in at least one
|
||||||
|
of the following places: within a NOTICE text file distributed
|
||||||
|
as part of the Derivative Works; within the Source form or
|
||||||
|
documentation, if provided along with the Derivative Works; or,
|
||||||
|
within a display generated by the Derivative Works, if and
|
||||||
|
wherever such third-party notices normally appear. The contents
|
||||||
|
of the NOTICE file are for informational purposes only and
|
||||||
|
do not modify the License. You may add Your own attribution
|
||||||
|
notices within Derivative Works that You distribute, alongside
|
||||||
|
or as an addendum to the NOTICE text from the Work, provided
|
||||||
|
that such additional attribution notices cannot be construed
|
||||||
|
as modifying the License.
|
||||||
|
|
||||||
|
You may add Your own copyright statement to Your modifications and
|
||||||
|
may provide additional or different license terms and conditions
|
||||||
|
for use, reproduction, or distribution of Your modifications, or
|
||||||
|
for any such Derivative Works as a whole, provided Your use,
|
||||||
|
reproduction, and distribution of the Work otherwise complies with
|
||||||
|
the conditions stated in this License.
|
||||||
|
|
||||||
|
5. Submission of Contributions. Unless You explicitly state otherwise,
|
||||||
|
any Contribution intentionally submitted for inclusion in the Work
|
||||||
|
by You to the Licensor shall be under the terms and conditions of
|
||||||
|
this License, without any additional terms or conditions.
|
||||||
|
Notwithstanding the above, nothing herein shall supersede or modify
|
||||||
|
the terms of any separate license agreement you may have executed
|
||||||
|
with Licensor regarding such Contributions.
|
||||||
|
|
||||||
|
6. Trademarks. This License does not grant permission to use the trade
|
||||||
|
names, trademarks, service marks, or product names of the Licensor,
|
||||||
|
except as required for reasonable and customary use in describing the
|
||||||
|
origin of the Work and reproducing the content of the NOTICE file.
|
||||||
|
|
||||||
|
7. Disclaimer of Warranty. Unless required by applicable law or
|
||||||
|
agreed to in writing, Licensor provides the Work (and each
|
||||||
|
Contributor provides its Contributions) on an "AS IS" BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||||
|
implied, including, without limitation, any warranties or conditions
|
||||||
|
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
|
||||||
|
PARTICULAR PURPOSE. You are solely responsible for determining the
|
||||||
|
appropriateness of using or redistributing the Work and assume any
|
||||||
|
risks associated with Your exercise of permissions under this License.
|
||||||
|
|
||||||
|
8. Limitation of Liability. In no event and under no legal theory,
|
||||||
|
whether in tort (including negligence), contract, or otherwise,
|
||||||
|
unless required by applicable law (such as deliberate and grossly
|
||||||
|
negligent acts) or agreed to in writing, shall any Contributor be
|
||||||
|
liable to You for damages, including any direct, indirect, special,
|
||||||
|
incidental, or consequential damages of any character arising as a
|
||||||
|
result of this License or out of the use or inability to use the
|
||||||
|
Work (including but not limited to damages for loss of goodwill,
|
||||||
|
work stoppage, computer failure or malfunction, or any and all
|
||||||
|
other commercial damages or losses), even if such Contributor
|
||||||
|
has been advised of the possibility of such damages.
|
||||||
|
|
||||||
|
9. Accepting Warranty or Additional Liability. While redistributing
|
||||||
|
the Work or Derivative Works thereof, You may choose to offer,
|
||||||
|
and charge a fee for, acceptance of support, warranty, indemnity,
|
||||||
|
or other liability obligations and/or rights consistent with this
|
||||||
|
License. However, in accepting such obligations, You may act only
|
||||||
|
on Your own behalf and on Your sole responsibility, not on behalf
|
||||||
|
of any other Contributor, and only if You agree to indemnify,
|
||||||
|
defend, and hold each Contributor harmless for any liability
|
||||||
|
incurred by, or claims asserted against, such Contributor by reason
|
||||||
|
of your accepting any such warranty or additional liability.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
APPENDIX: How to apply the Apache License to your work.
|
||||||
|
|
||||||
|
To apply the Apache License to your work, attach the following
|
||||||
|
boilerplate notice, with the fields enclosed by brackets "[]"
|
||||||
|
replaced with your own identifying information. (Don't include
|
||||||
|
the brackets!) The text should be enclosed in the appropriate
|
||||||
|
comment syntax for the file format. We also recommend that a
|
||||||
|
file or class name and description of purpose be included on the
|
||||||
|
same "printed page" as the copyright notice for easier
|
||||||
|
identification within third-party archives.
|
||||||
|
|
||||||
|
Copyright [yyyy] [name of copyright owner]
|
||||||
|
|
||||||
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
you may not use this file except in compliance with the License.
|
||||||
|
You may obtain a copy of the License at
|
||||||
|
|
||||||
|
http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
|
||||||
|
Unless required by applicable law or agreed to in writing, software
|
||||||
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
See the License for the specific language governing permissions and
|
||||||
|
limitations under the License.
|
|
@ -0,0 +1,38 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2014 dorkbox, llc
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
import java.lang.reflect.Field;
|
||||||
|
import java.security.PrivilegedExceptionAction;
|
||||||
|
|
||||||
|
public class GetUnsafe implements PrivilegedExceptionAction<sun.misc.Unsafe> {
|
||||||
|
GetUnsafe() {
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public sun.misc.Unsafe run() throws Exception {
|
||||||
|
Class<sun.misc.Unsafe> unsafeClass = sun.misc.Unsafe.class;
|
||||||
|
Field theUnsafe = unsafeClass.getDeclaredField("theUnsafe");
|
||||||
|
theUnsafe.setAccessible(true);
|
||||||
|
|
||||||
|
Object unsafeObject = theUnsafe.get(null);
|
||||||
|
if (unsafeClass.isInstance(unsafeObject)) {
|
||||||
|
return unsafeClass.cast(unsafeObject);
|
||||||
|
}
|
||||||
|
|
||||||
|
throw new NoSuchFieldError("the Unsafe");
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,28 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2014 dorkbox, llc
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
public interface ObjectPool<T> {
|
||||||
|
/**
|
||||||
|
* Takes an object from the pool
|
||||||
|
*/
|
||||||
|
public ObjectPoolHolder<T> take();
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return object to the pool
|
||||||
|
*/
|
||||||
|
public void release(ObjectPoolHolder<T> object);
|
||||||
|
}
|
|
@ -0,0 +1,38 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2014 dorkbox, llc
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
|
||||||
|
public class ObjectPoolFactory {
|
||||||
|
|
||||||
|
private ObjectPoolFactory() {
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Creates a pool of the specified size
|
||||||
|
*/
|
||||||
|
public static <T> ObjectPool<T> create(PoolableObject<T> poolableObject, int size) {
|
||||||
|
try {
|
||||||
|
// here we use FAST (via UNSAFE)
|
||||||
|
UnsafeObjectPool<T> fastObjectPool = new UnsafeObjectPool<T>(poolableObject, size);
|
||||||
|
return fastObjectPool;
|
||||||
|
} catch (Throwable ignored) {
|
||||||
|
// fallback (LinkedBlockingDeque) in case UNSAFE isn't available. (ie: android)
|
||||||
|
SafeObjectPool<T> slowObjectPool = new SafeObjectPool<T>(poolableObject, size);
|
||||||
|
return slowObjectPool;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,32 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2014 dorkbox, llc
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
import java.util.concurrent.atomic.AtomicBoolean;
|
||||||
|
|
||||||
|
public class ObjectPoolHolder<T> {
|
||||||
|
private T value;
|
||||||
|
|
||||||
|
AtomicBoolean state = new AtomicBoolean(true);
|
||||||
|
|
||||||
|
public ObjectPoolHolder(T value) {
|
||||||
|
this.value = value;
|
||||||
|
}
|
||||||
|
|
||||||
|
public T getValue() {
|
||||||
|
return this.value;
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,23 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2014 dorkbox, llc
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
public interface PoolableObject<T> {
|
||||||
|
/**
|
||||||
|
* called when a new instance is created
|
||||||
|
*/
|
||||||
|
public T create();
|
||||||
|
}
|
|
@ -0,0 +1,80 @@
|
||||||
|
/*
|
||||||
|
* from: https://code.google.com/p/furious-objectpool/
|
||||||
|
* copyright Eddie Raapoto 2012
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*
|
||||||
|
* Modified by dorkbox, llc
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
import java.util.concurrent.LinkedBlockingDeque;
|
||||||
|
|
||||||
|
|
||||||
|
class SafeObjectPool<T> implements ObjectPool<T> {
|
||||||
|
|
||||||
|
private static final boolean FREE = true;
|
||||||
|
private static final boolean USED = false;
|
||||||
|
|
||||||
|
|
||||||
|
private final LinkedBlockingDeque<ObjectPoolHolder<T>> queue;
|
||||||
|
|
||||||
|
private ThreadLocal<ObjectPoolHolder<T>> localValue = new ThreadLocal<>();
|
||||||
|
|
||||||
|
SafeObjectPool(PoolableObject<T> poolableObject, int size) {
|
||||||
|
|
||||||
|
this.queue = new LinkedBlockingDeque<ObjectPoolHolder<T>>(size);
|
||||||
|
|
||||||
|
for (int x=0;x<size;x++) {
|
||||||
|
this.queue.add(new ObjectPoolHolder<T>(poolableObject.create()));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public ObjectPoolHolder<T> take() {
|
||||||
|
// if we have an object available in the cache, use it instead.
|
||||||
|
ObjectPoolHolder<T> localObject = this.localValue.get();
|
||||||
|
if (localObject != null) {
|
||||||
|
if (localObject.state.compareAndSet(FREE, USED)) {
|
||||||
|
return localObject;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
ObjectPoolHolder<T> holder = this.queue.poll();
|
||||||
|
|
||||||
|
if (holder == null) {
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
// the use of a threadlocal reference here helps eliminates contention. This also checks OTHER threads,
|
||||||
|
// as they might have one sitting on the cache
|
||||||
|
if (holder.state.compareAndSet(FREE, USED)) {
|
||||||
|
this.localValue.set(holder);
|
||||||
|
return holder;
|
||||||
|
} else {
|
||||||
|
// put it back into the queue
|
||||||
|
this.queue.offer(holder);
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void release(ObjectPoolHolder<T> object) {
|
||||||
|
if (object.state.compareAndSet(USED, FREE)) {
|
||||||
|
this.queue.offer(object);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
throw new IllegalArgumentException("Invalid reference passed");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,130 @@
|
||||||
|
/*
|
||||||
|
* from: http://ashkrit.blogspot.com/2013/05/lock-less-java-object-pool.html
|
||||||
|
* https://github.com/ashkrit/blog/tree/master/FastObjectPool
|
||||||
|
* copyright ashkrit 2013
|
||||||
|
*
|
||||||
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
* you may not use this file except in compliance with the License.
|
||||||
|
* You may obtain a copy of the License at
|
||||||
|
*
|
||||||
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
*
|
||||||
|
* Unless required by applicable law or agreed to in writing, software
|
||||||
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
* See the License for the specific language governing permissions and
|
||||||
|
* limitations under the License.
|
||||||
|
*
|
||||||
|
* Modified by dorkbox, llc
|
||||||
|
*/
|
||||||
|
package dorkbox.objectPool;
|
||||||
|
|
||||||
|
import java.security.AccessController;
|
||||||
|
import java.util.concurrent.locks.ReentrantLock;
|
||||||
|
|
||||||
|
|
||||||
|
class UnsafeObjectPool<T> implements ObjectPool<T> {
|
||||||
|
|
||||||
|
private final sun.misc.Unsafe unsafe;
|
||||||
|
|
||||||
|
private static final boolean FREE = true;
|
||||||
|
private static final boolean USED = false;
|
||||||
|
|
||||||
|
private final ObjectPoolHolder<T>[] objects;
|
||||||
|
|
||||||
|
private volatile int takePointer;
|
||||||
|
private volatile int releasePointer;
|
||||||
|
|
||||||
|
private final int mask;
|
||||||
|
private final long BASE;
|
||||||
|
private final long INDEXSCALE;
|
||||||
|
private final long ASHIFT;
|
||||||
|
|
||||||
|
public ReentrantLock lock = new ReentrantLock();
|
||||||
|
private ThreadLocal<ObjectPoolHolder<T>> localValue = new ThreadLocal<>();
|
||||||
|
|
||||||
|
UnsafeObjectPool(PoolableObject<T> poolableObject, int size) throws Throwable {
|
||||||
|
this.unsafe = AccessController.doPrivileged(new GetUnsafe());
|
||||||
|
|
||||||
|
if (this.unsafe == null) {
|
||||||
|
throw new Exception("Unable to load unsafe");
|
||||||
|
}
|
||||||
|
|
||||||
|
int newSize = 1;
|
||||||
|
while (newSize < size) {
|
||||||
|
newSize = newSize << 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
size = newSize;
|
||||||
|
|
||||||
|
@SuppressWarnings({"unchecked", "rawtypes"})
|
||||||
|
ObjectPoolHolder<T>[] stuff = new ObjectPoolHolder[size];
|
||||||
|
this.objects = stuff;
|
||||||
|
|
||||||
|
for (int x=0;x<size;x++) {
|
||||||
|
this.objects[x] = new ObjectPoolHolder<T>(poolableObject.create());
|
||||||
|
}
|
||||||
|
|
||||||
|
this.mask = size-1;
|
||||||
|
this.releasePointer = size;
|
||||||
|
this.BASE = this.unsafe.arrayBaseOffset(ObjectPoolHolder[].class);
|
||||||
|
this.INDEXSCALE = this.unsafe.arrayIndexScale(ObjectPoolHolder[].class);
|
||||||
|
this.ASHIFT = 31 - Integer.numberOfLeadingZeros((int) this.INDEXSCALE);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public ObjectPoolHolder<T> take() {
|
||||||
|
int localTakePointer;
|
||||||
|
|
||||||
|
// if we have an object available in the cache, use it instead.
|
||||||
|
ObjectPoolHolder<T> localObject = this.localValue.get();
|
||||||
|
if (localObject != null) {
|
||||||
|
if (localObject.state.compareAndSet(FREE, USED)) {
|
||||||
|
return localObject;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
sun.misc.Unsafe unsafe = this.unsafe;
|
||||||
|
|
||||||
|
while (this.releasePointer != (localTakePointer=this.takePointer)) {
|
||||||
|
int index = localTakePointer & this.mask;
|
||||||
|
|
||||||
|
ObjectPoolHolder<T> holder = this.objects[index];
|
||||||
|
//if(holder!=null && THE_UNSAFE.compareAndSwapObject(objects, (index*INDEXSCALE)+BASE, holder, null))
|
||||||
|
if (holder != null && unsafe.compareAndSwapObject(this.objects, (index<<this.ASHIFT)+this.BASE, holder, null)) {
|
||||||
|
this.takePointer = localTakePointer+1;
|
||||||
|
|
||||||
|
// the use of a threadlocal reference here helps eliminates contention. This also checks OTHER threads,
|
||||||
|
// as they might have one sitting on the cache
|
||||||
|
if (holder.state.compareAndSet(FREE, USED)) {
|
||||||
|
this.localValue.set(holder);
|
||||||
|
return holder;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void release(ObjectPoolHolder<T> object) {
|
||||||
|
try {
|
||||||
|
this.lock.lockInterruptibly();
|
||||||
|
|
||||||
|
int localValue = this.releasePointer;
|
||||||
|
//long index = ((localValue & mask) * INDEXSCALE ) + BASE;
|
||||||
|
long index = ((localValue & this.mask)<<this.ASHIFT ) + this.BASE;
|
||||||
|
|
||||||
|
if (object.state.compareAndSet(USED, FREE)) {
|
||||||
|
this.unsafe.putOrderedObject(this.objects, index, object);
|
||||||
|
this.releasePointer = localValue+1;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
throw new IllegalArgumentException("Invalid reference passed");
|
||||||
|
}
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
}
|
||||||
|
finally {
|
||||||
|
this.lock.unlock();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in New Issue