| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| #include "MemoryUsage.h" |
| #include <decaf/util/concurrent/Concurrent.h> |
| |
| using namespace activemq; |
| using namespace activemq::util; |
| using namespace decaf::util; |
| using namespace decaf::util::concurrent; |
| using namespace std; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| MemoryUsage::MemoryUsage() : limit(0), usage(0), mutex() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| MemoryUsage::MemoryUsage(unsigned long long limit) : limit(limit), usage(), mutex() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| MemoryUsage::~MemoryUsage() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void MemoryUsage::waitForSpace() { |
| |
| synchronized(&mutex) { |
| while (this->isFull()) { |
| mutex.wait(); |
| } |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void MemoryUsage::waitForSpace(unsigned int timeout) { |
| |
| if (this->isFull()) { |
| synchronized(&mutex) { |
| mutex.wait(timeout); |
| } |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void MemoryUsage::increaseUsage(unsigned long long value) { |
| |
| if (value == 0) { |
| return; |
| } |
| |
| synchronized(&mutex) { |
| this->usage += value; |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void MemoryUsage::decreaseUsage(unsigned long long value) { |
| |
| if (value == 0) { |
| return; |
| } |
| |
| synchronized(&mutex) { |
| value > this->usage ? this->usage = 0 : this->usage -= value; |
| mutex.notifyAll(); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| bool MemoryUsage::isFull() const { |
| bool result = false; |
| |
| synchronized(&mutex) { |
| result = this->usage >= this->limit; |
| } |
| |
| return result; |
| } |