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/*
* 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 _THRIFT_CONCURRENCY_THREAD_H_
#define _THRIFT_CONCURRENCY_THREAD_H_ 1
#include <stdint.h>
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef USE_BOOST_THREAD
#include <boost/thread.hpp>
#endif
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#endif
namespace apache { namespace thrift { namespace concurrency {
class Thread;
/**
* Minimal runnable class. More or less analogous to java.lang.Runnable.
*
* @version $Id:$
*/
class Runnable {
public:
virtual ~Runnable() {};
virtual void run() = 0;
/**
* Gets the thread object that is hosting this runnable object - can return
* an empty boost::shared pointer if no references remain on thet thread object
*/
virtual boost::shared_ptr<Thread> thread() { return thread_.lock(); }
/**
* Sets the thread that is executing this object. This is only meant for
* use by concrete implementations of Thread.
*/
virtual void thread(boost::shared_ptr<Thread> value) { thread_ = value; }
private:
boost::weak_ptr<Thread> thread_;
};
/**
* Minimal thread class. Returned by thread factory bound to a Runnable object
* and ready to start execution. More or less analogous to java.lang.Thread
* (minus all the thread group, priority, mode and other baggage, since that
* is difficult to abstract across platforms and is left for platform-specific
* ThreadFactory implemtations to deal with
*
* @see apache::thrift::concurrency::ThreadFactory)
*/
class Thread {
public:
#ifdef USE_BOOST_THREAD
typedef boost::thread::id id_t;
static inline bool is_current(id_t t) { return t == boost::this_thread::get_id(); }
static inline id_t get_current() { return boost::this_thread::get_id(); }
#else
typedef uint64_t id_t;
static inline bool is_current(pthread_t t) { return pthread_equal(pthread_self(), t); }
static inline id_t get_current() { return (Thread::id_t)pthread_self(); }
#endif
virtual ~Thread() {};
/**
* Starts the thread. Does platform specific thread creation and
* configuration then invokes the run method of the Runnable object bound
* to this thread.
*/
virtual void start() = 0;
/**
* Join this thread. Current thread blocks until this target thread
* completes.
*/
virtual void join() = 0;
/**
* Gets the thread's platform-specific ID
*/
virtual id_t getId() = 0;
/**
* Gets the runnable object this thread is hosting
*/
virtual boost::shared_ptr<Runnable> runnable() const { return _runnable; }
protected:
virtual void runnable(boost::shared_ptr<Runnable> value) { _runnable = value; }
private:
boost::shared_ptr<Runnable> _runnable;
};
/**
* Factory to create platform-specific thread object and bind them to Runnable
* object for execution
*/
class ThreadFactory {
public:
virtual ~ThreadFactory() {}
virtual boost::shared_ptr<Thread> newThread(boost::shared_ptr<Runnable> runnable) const = 0;
/** Gets the current thread id or unknown_thread_id if the current thread is not a thrift thread */
static const Thread::id_t unknown_thread_id;
virtual Thread::id_t getCurrentThreadId() const = 0;
};
}}} // apache::thrift::concurrency
#endif // #ifndef _THRIFT_CONCURRENCY_THREAD_H_
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