Author: tabish
Date: Wed Aug 27 15:04:38 2008
New Revision: 689641
URL: http://svn.apache.org/viewvc?rev=689641&view=rev
Log:
Add a start on the Atomic Package
Added:
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.cpp
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.h
Added:
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.cpp
URL:
http://svn.apache.org/viewvc/activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.cpp?rev=689641&view=auto
==============================================================================
---
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.cpp
(added)
+++
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.cpp
Wed Aug 27 15:04:38 2008
@@ -0,0 +1,50 @@
+/*
+ * 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 "AtomicBoolean.h"
+
+#include <decaf/lang/Boolean.h>
+
+using namespace decaf;
+using namespace decaf::lang;
+using namespace decaf::util;
+using namespace decaf::util::concurrent;
+using namespace decaf::util::concurrent::atomic;
+
+////////////////////////////////////////////////////////////////////////////////
+AtomicBoolean::AtomicBoolean() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool AtomicBoolean::compareAndSet( bool expect, bool update ) {
+ // TODO
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool AtomicBoolean::getAndSet( bool newValue ) {
+ for(;;) {
+ bool current = get();
+ if( compareAndSet( current, newValue ) ) {
+ return current;
+ }
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+std::string AtomicBoolean::toString() {
+ return Boolean::toString( this->value ? true : false );
+}
Added:
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.h
URL:
http://svn.apache.org/viewvc/activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.h?rev=689641&view=auto
==============================================================================
---
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.h
(added)
+++
activemq/activemq-cpp/trunk/src/main/decaf/util/concurrent/atomic/AtomicBoolean.h
Wed Aug 27 15:04:38 2008
@@ -0,0 +1,99 @@
+/*
+ * 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.
+ */
+
+#ifndef _DECAF_UTIL_CONCURRENT_ATOMIC_ATOMICBOOLEAN_H_
+#define _DECAF_UTIL_CONCURRENT_ATOMIC_ATOMICBOOLEAN_H_
+
+#include <string>
+#include <decaf/util/Config.h>
+
+namespace decaf {
+namespace util {
+namespace concurrent {
+namespace atomic {
+
+ /**
+ * A boolean value that may be updated atomically. An AtomicBoolean is used
+ * in applications such as atomically updated flags, and cannot be used as
a
+ * replacement for a Boolean.
+ */
+ class DECAF_API AtomicBoolean {
+ private:
+
+ volatile int value;
+
+ public:
+
+ /**
+ * Creates a new AtomicBoolean whose initial value is false.
+ */
+ AtomicBoolean();
+
+ /**
+ * Creates a new AtomicBoolean with the initial value.
+ * @param initialValue - The initial value of this boolean.
+ */
+ AtomicBoolean( bool initialValue );
+
+ virtual ~AtomicBoolean() {}
+
+ /**
+ * Gets the current value of this AtomicBoolean.
+ * @returns the currently set value.
+ */
+ bool get() const {
+ return value == 0 ? false : true;
+ }
+
+ /**
+ * Unconditionally sets to the given value.
+ * @param newValue - the new value
+ */
+ void set( bool newValue ) {
+ this->value = newValue ? 1 : 0;
+ }
+
+ /**
+ * Atomically sets the value to the given updated value if the current
+ * value == the expected value.
+ *
+ * @param expect - the expected value
+ * @param update - the new value
+ * @returns true if successful. False return indicates that the actual
value
+ * was not equal to the expected value.
+ */
+ bool compareAndSet( bool expect, bool update );
+
+ /**
+ * Atomically sets to the given value and returns the previous value.
+ *
+ * @param newValue - the new value
+ * @returns the previous value
+ */
+ bool getAndSet( bool newValue );
+
+ /**
+ * Returns the String representation of the current value.
+ * @returns the String representation of the current value.
+ */
+ std::string toString();
+
+ };
+
+}}}}
+
+#endif /*_DECAF_UTIL_CONCURRENT_ATOMIC_ATOMICBOOLEAN_H_*/
