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git.proxmox.com Git - ceph.git/blob - ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/unique_lock/cons/try_to_lock_pass.cpp
1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Copyright (C) 2011 Vicente J. Botet Escriba
12 // Distributed under the Boost Software License, Version 1.0. (See accompanying
13 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
15 // <boost/thread/locks.hpp>
17 // template <class Mutex> class unique_lock;
19 // unique_lock(mutex_type& m, try_to_lock_t);
22 #include <boost/thread/lock_types.hpp>
23 #include <boost/thread/mutex.hpp>
24 #include <boost/thread/thread.hpp>
25 #include <boost/detail/lightweight_test.hpp>
30 #if defined BOOST_THREAD_USES_CHRONO
31 typedef boost::chrono::system_clock Clock
;
32 typedef Clock::time_point time_point
;
33 typedef Clock::duration duration
;
34 typedef boost::chrono::milliseconds ms
;
35 typedef boost::chrono::nanoseconds ns
;
41 #if defined BOOST_THREAD_USES_CHRONO
42 time_point t0
= Clock::now();
44 boost::unique_lock
<boost::mutex
> lk(m
, boost::try_to_lock
);
45 BOOST_TEST(lk
.owns_lock() == false);
48 boost::unique_lock
<boost::mutex
> lk(m
, boost::try_to_lock
);
49 BOOST_TEST(lk
.owns_lock() == false);
52 boost::unique_lock
<boost::mutex
> lk(m
, boost::try_to_lock
);
53 BOOST_TEST(lk
.owns_lock() == false);
57 boost::unique_lock
<boost::mutex
> lk(m
, boost::try_to_lock
);
58 if (lk
.owns_lock()) break;
60 time_point t1
= Clock::now();
62 ns d
= t1
- t0
- ms(250);
63 // This test is spurious as it depends on the time the thread system switches the threads
64 BOOST_TEST(d
< ns(50000000)+ms(1000)); // within 50ms
66 // time_point t0 = Clock::now();
68 // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
69 // BOOST_TEST(lk.owns_lock() == false);
72 // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
73 // BOOST_TEST(lk.owns_lock() == false);
76 // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
77 // BOOST_TEST(lk.owns_lock() == false);
81 boost::unique_lock
<boost::mutex
> lk(m
, boost::try_to_lock
);
82 if (lk
.owns_lock()) break;
84 //time_point t1 = Clock::now();
85 //ns d = t1 - t0 - ms(250);
86 // This test is spurious as it depends on the time the thread system switches the threads
87 //BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms
95 #if defined BOOST_THREAD_USES_CHRONO
96 boost::this_thread::sleep_for(ms(250));
102 return boost::report_errors();