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author | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
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committer | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
commit | fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7 (patch) | |
tree | 928419d6bfe794865e4b8f0634bd792f795c4b8a /trunk/infrastructure/net.appjet.oui/synchronizer.scala | |
parent | 0fdab3db005c4fa31fb8306b573c0b35073d3e56 (diff) | |
parent | d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8 (diff) | |
download | etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.gz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.xz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.zip |
Merge branch 'master' into plugin-framework
Diffstat (limited to 'trunk/infrastructure/net.appjet.oui/synchronizer.scala')
-rw-r--r-- | trunk/infrastructure/net.appjet.oui/synchronizer.scala | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/trunk/infrastructure/net.appjet.oui/synchronizer.scala b/trunk/infrastructure/net.appjet.oui/synchronizer.scala deleted file mode 100644 index 2a6d9c1..0000000 --- a/trunk/infrastructure/net.appjet.oui/synchronizer.scala +++ /dev/null @@ -1,69 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * 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 net.appjet.oui; - -class Synchronizer { - import java.util.concurrent.locks.ReentrantLock; - import java.util.concurrent.ConcurrentHashMap; - - private val lockMap = new ConcurrentHashMap[Object, Lock]; - private val monitor = new Object {}; - - private class Lock { - var users = 0; - val impl = new ReentrantLock; - } - - def acquire(key: Object) { - val lock = monitor.synchronized { - var lck = lockMap.get(key); - if (lck == null) { - lck = new Lock; - lockMap.put(key, lck); - } - lck.users += 1; - lck; - } - lock.impl.lock(); - } - - def isHeld(key: Object): Boolean = { - monitor.synchronized { - val lck = lockMap.get(key); - if (lck == null) { - false; - } - else { - lck.impl.isLocked; - } - } - } - - def release(key: Object) { - val lock = monitor.synchronized { - var lck = lockMap.get(key); - lck.users -= 1; - if (lck.users == 0) { - lockMap.remove(key); - } - lck; - } - lock.impl.unlock(); - } -} - -object GlobalSynchronizer extends Synchronizer; |