//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// Copyright (C) 2011 Vicente J. Botet Escriba
//
//  Distributed under the Boost Software License, Version 1.0. (See accompanying
//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// <boost/thread/condition_variable_any>

// class condition_variable_any;

// condition_variable_any(const condition_variable_any&) = delete;

#include <boost/thread/condition_variable.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include <boost/detail/lightweight_test.hpp>

#if defined BOOST_THREAD_USES_CHRONO

boost::condition_variable_any cv;

typedef boost::timed_mutex L0;
typedef boost::unique_lock<L0> L1;

L0 m0;

int test1 = 0;
int test2 = 0;

int runs = 0;

void f()
{
    typedef boost::chrono::system_clock Clock;
    typedef boost::chrono::milliseconds milliseconds;
    L1 lk(m0);
    BOOST_TEST(test2 == 0);
    test1 = 1;
    cv.notify_one();
    int count=0;
    Clock::time_point t0 = Clock::now();
    while (test2 == 0 &&
           cv.wait_for(lk, milliseconds(250)) == boost::cv_status::no_timeout)
        count++;
    Clock::time_point t1 = Clock::now();
    if (runs == 0)
    {
        BOOST_TEST(t1 - t0 < milliseconds(250));
        BOOST_TEST(test2 != 0);
    }
    else
    {
      // This test is spurious as it depends on the time the thread system switches the threads
        BOOST_TEST(t1 - t0 - milliseconds(250) < milliseconds(count*250+5+1000));
        BOOST_TEST(test2 == 0);
    }
    ++runs;
}

int main()
{
    {
        L1 lk(m0);
        boost::thread t(f);
        BOOST_TEST(test1 == 0);
        while (test1 == 0)
            cv.wait(lk);
        BOOST_TEST(test1 != 0);
        test2 = 1;
        lk.unlock();
        cv.notify_one();
        t.join();
    }
    test1 = 0;
    test2 = 0;
    {
        L1 lk(m0);
        boost::thread t(f);
        BOOST_TEST(test1 == 0);
        while (test1 == 0)
            cv.wait(lk);
        BOOST_TEST(test1 != 0);
        lk.unlock();
        t.join();
    }

  return boost::report_errors();
}

#else
#error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
#endif
