projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | //===----------------------------------------------------------------------===// |
| 2 | // | |
| 3 | // The LLVM Compiler Infrastructure | |
| 4 | // | |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open | |
| 6 | // Source Licenses. See LICENSE.TXT for details. | |
| 7 | // | |
| 8 | //===----------------------------------------------------------------------===// | |
| 9 | ||
| 10 | // Copyright (C) 2011 Vicente J. Botet Escriba | |
| 11 | // | |
| 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) | |
| 14 | ||
| 15 | // <boost/thread/locks.hpp> | |
| 16 | ||
| 17 | // template <class Mutex> class shared_lock; | |
| 18 | ||
| 19 | // shared_lock(mutex_type& m, try_to_lock_t); | |
| 20 | ||
| 21 | ||
| 22 | #include <boost/thread/lock_types.hpp> | |
| 23 | #include <boost/thread/shared_mutex.hpp> | |
| 24 | #include <boost/thread/thread.hpp> | |
| 25 | #include <boost/detail/lightweight_test.hpp> | |
| 26 | ||
| 27 | boost::shared_mutex m; | |
| 28 | ||
| 29 | #if defined BOOST_THREAD_USES_CHRONO | |
| 30 | typedef boost::chrono::system_clock Clock; | |
| 31 | typedef Clock::time_point time_point; | |
| 32 | typedef Clock::duration duration; | |
| 33 | typedef boost::chrono::milliseconds ms; | |
| 34 | typedef boost::chrono::nanoseconds ns; | |
| 35 | #else | |
| 36 | #endif | |
| 37 | ||
| 38 | void f() | |
| 39 | { | |
| 40 | #if defined BOOST_THREAD_USES_CHRONO | |
| 41 | time_point t0 = Clock::now(); | |
| 42 | { | |
| 43 | boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 44 | BOOST_TEST(lk.owns_lock() == false); | |
| 45 | } | |
| 46 | { | |
| 47 | boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 48 | BOOST_TEST(lk.owns_lock() == false); | |
| 49 | } | |
| 50 | { | |
| 51 | boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 52 | BOOST_TEST(lk.owns_lock() == false); | |
| 53 | } | |
| b32b8144 | 54 | for (;;) |
| 7c673cae FG |
55 | { |
| 56 | boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 57 | if (lk.owns_lock()) break; | |
| 58 | } | |
| 59 | time_point t1 = Clock::now(); | |
| 60 | ns d = t1 - t0 - ms(250); | |
| 61 | // This test is spurious as it depends on the time the thread system switches the threads | |
| 62 | BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms | |
| 63 | #else | |
| 64 | // time_point t0 = Clock::now(); | |
| 65 | // { | |
| 66 | // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 67 | // BOOST_TEST(lk.owns_lock() == false); | |
| 68 | // } | |
| 69 | // { | |
| 70 | // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 71 | // BOOST_TEST(lk.owns_lock() == false); | |
| 72 | // } | |
| 73 | // { | |
| 74 | // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 75 | // BOOST_TEST(lk.owns_lock() == false); | |
| 76 | // } | |
| b32b8144 | 77 | for (;;) |
| 7c673cae FG |
78 | { |
| 79 | boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock); | |
| 80 | if (lk.owns_lock()) break; | |
| 81 | } | |
| 82 | //time_point t1 = Clock::now(); | |
| 83 | //ns d = t1 - t0 - ms(250); | |
| 84 | // This test is spurious as it depends on the time the thread system switches the threads | |
| 85 | //BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms | |
| 86 | #endif | |
| 87 | } | |
| 88 | ||
| 89 | int main() | |
| 90 | { | |
| 91 | m.lock(); | |
| 92 | boost::thread t(f); | |
| 93 | #if defined BOOST_THREAD_USES_CHRONO | |
| 94 | boost::this_thread::sleep_for(ms(250)); | |
| 95 | #else | |
| 96 | #endif | |
| 97 | m.unlock(); | |
| 98 | t.join(); | |
| 99 | ||
| 100 | return boost::report_errors(); | |
| 101 | } | |
| 102 |