hadoop-hdfs-project/hadoop-hdfs/src/contrib/libhdfs3/src/common/Thread.h

/**
 * 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 _HDFS_LIBHDFS3_COMMON_THREAD_H_
#define _HDFS_LIBHDFS3_COMMON_THREAD_H_

#include "platform.h"

#include <signal.h>

#ifdef NEED_BOOST

#include <boost/thread.hpp>

namespace hdfs {
namespace internal {

using boost::thread;
using boost::mutex;
using boost::lock_guard;
using boost::unique_lock;
using boost::condition_variable;
using boost::defer_lock_t;
using boost::once_flag;
using boost::call_once;
using namespace boost::this_thread;

}
}

#else

#include <thread>
#include <mutex>
#include <condition_variable>

namespace hdfs {
namespace internal {

using std::thread;
using std::mutex;
using std::lock_guard;
using std::unique_lock;
using std::condition_variable;
using std::defer_lock_t;
using std::once_flag;
using std::call_once;
using namespace std::this_thread;

}
}
#endif

namespace hdfs {
namespace internal {

/*
 * make the background thread ignore these signals (which should allow that
 * they be delivered to the main thread)
 */
sigset_t ThreadBlockSignal();

/*
 * Restore previous signals.
 */
void ThreadUnBlockSignal(sigset_t sigs);

}
}

#define CREATE_THREAD(retval, fun) \
    do { \
        sigset_t sigs = hdfs::internal::ThreadBlockSignal(); \
        try { \
            retval = hdfs::internal::thread(fun); \
            hdfs::internal::ThreadUnBlockSignal(sigs); \
        } catch (...) { \
            hdfs::internal::ThreadUnBlockSignal(sigs); \
            throw; \
        } \
    } while(0)

#endif /* _HDFS_LIBHDFS3_COMMON_THREAD_H_ */