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/**
* 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.ajstdlib;
import scala.collection.mutable.{HashMap,ListBuffer};
import java.util.concurrent.locks.ReentrantLock;
object timer {
var _timings = new HashMap[String,ListBuffer[double]];
var _lock = new ReentrantLock;
var _callstack = new ThreadLocal[ListBuffer[String]];
def start(opname: String) = {
var _localcallstack = _callstack.get();
if (_localcallstack == null) {
_callstack.set(new ListBuffer[String]);
_localcallstack = _callstack.get();
}
_localcallstack += opname;
var _oplabel = _localcallstack.mkString(".");
val startTime: long = System.nanoTime();
new {
def done() {
val elapsedTimeMs: double = (System.nanoTime() - startTime) / 1.0e6;
_lock.lock();
try {
var times = _timings.getOrElse(_oplabel, new ListBuffer[double]);
/*
if (times.size > 100000) {
times = new ListBuffer[double];
}*/
times += elapsedTimeMs;
_timings.put(_oplabel, times);
_localcallstack.remove(_localcallstack.length-1);
} finally {
_lock.unlock();
}
}
}
}
def getOpNames(): Array[String] = {
_lock.lock();
try {
return _timings.keys.toList.toArray;
} finally {
_lock.unlock();
}
}
def getStats(opname: String): Array[double] = {
_lock.lock();
try {
var times:ListBuffer[double] = _timings(opname);
var total = times.foldRight(0.0)(_ + _);
return Array(times.size, total, (total / times.size));
} finally {
_lock.unlock();
}
}
def reset() {
_lock.lock();
_timings = new HashMap[String,ListBuffer[double]];
_lock.unlock();
}
}
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