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Copy pathtest_shared_mutex_part_2.cpp
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294 lines (242 loc) · 9.13 KB
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// (C) Copyright 2006-7 Anthony Williams
// 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)
#define BOOST_THREAD_VERSION 2
#define BOOST_TEST_MODULE Boost.Threads: shared_mutex_part2 test suite
#include <boost/config.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/thread/thread.hpp>
#include <boost/thread/xtime.hpp>
#include "./util.inl"
#include "./shared_mutex_locking_thread.hpp"
#define CHECK_LOCKED_VALUE_EQUAL(mutex_name,value,expected_value) \
{ \
boost::unique_lock<boost::mutex> lock(mutex_name); \
BOOST_CHECK_EQUAL(value,expected_value); \
}
class simple_upgrade_thread
{
boost::shared_mutex& rwm;
boost::mutex& finish_mutex;
boost::mutex& unblocked_mutex;
unsigned& unblocked_count;
void operator=(simple_upgrade_thread&);
public:
simple_upgrade_thread(boost::shared_mutex& rwm_,
boost::mutex& finish_mutex_,
boost::mutex& unblocked_mutex_,
unsigned& unblocked_count_):
rwm(rwm_),finish_mutex(finish_mutex_),
unblocked_mutex(unblocked_mutex_),unblocked_count(unblocked_count_)
{}
#if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS)
simple_upgrade_thread(simple_upgrade_thread const&) = default;
#endif
void operator()()
{
boost::upgrade_lock<boost::shared_mutex> lk(rwm);
{
boost::unique_lock<boost::mutex> ulk(unblocked_mutex);
++unblocked_count;
}
boost::unique_lock<boost::mutex> flk(finish_mutex);
}
};
BOOST_AUTO_TEST_CASE(test_only_one_upgrade_lock_permitted)
{
unsigned const number_of_threads=2;
boost::thread_group pool;
boost::shared_mutex rw_mutex;
unsigned unblocked_count=0;
unsigned simultaneous_running_count=0;
unsigned max_simultaneous_running=0;
boost::mutex unblocked_count_mutex;
boost::condition_variable unblocked_condition;
boost::mutex finish_mutex;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
try
{
for(unsigned i=0;i<number_of_threads;++i)
{
pool.create_thread(locking_thread<boost::upgrade_lock<boost::shared_mutex> >(rw_mutex,unblocked_count,unblocked_count_mutex,unblocked_condition,
finish_mutex,simultaneous_running_count,max_simultaneous_running));
}
boost::thread::sleep(delay(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,unblocked_count,1U);
finish_lock.unlock();
pool.join_all();
}
catch(...)
{
pool.interrupt_all();
pool.join_all();
throw;
}
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,unblocked_count,number_of_threads);
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,max_simultaneous_running,1u);
}
BOOST_AUTO_TEST_CASE(test_can_lock_upgrade_if_currently_locked_shared)
{
boost::thread_group pool;
boost::shared_mutex rw_mutex;
unsigned unblocked_count=0;
unsigned simultaneous_running_count=0;
unsigned max_simultaneous_running=0;
boost::mutex unblocked_count_mutex;
boost::condition_variable unblocked_condition;
boost::mutex finish_mutex;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
unsigned const reader_count=10;
try
{
for(unsigned i=0;i<reader_count;++i)
{
pool.create_thread(locking_thread<boost::shared_lock<boost::shared_mutex> >(rw_mutex,unblocked_count,unblocked_count_mutex,unblocked_condition,
finish_mutex,simultaneous_running_count,max_simultaneous_running));
}
boost::thread::sleep(delay(1));
pool.create_thread(locking_thread<boost::upgrade_lock<boost::shared_mutex> >(rw_mutex,unblocked_count,unblocked_count_mutex,unblocked_condition,
finish_mutex,simultaneous_running_count,max_simultaneous_running));
{
boost::unique_lock<boost::mutex> lk(unblocked_count_mutex);
while(unblocked_count<(reader_count+1))
{
unblocked_condition.wait(lk);
}
}
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,unblocked_count,reader_count+1);
finish_lock.unlock();
pool.join_all();
}
catch(...)
{
pool.interrupt_all();
pool.join_all();
throw;
}
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,unblocked_count,reader_count+1);
CHECK_LOCKED_VALUE_EQUAL(unblocked_count_mutex,max_simultaneous_running,reader_count+1);
}
BOOST_AUTO_TEST_CASE(test_can_lock_upgrade_to_unique_if_currently_locked_upgrade)
{
boost::shared_mutex mtx;
boost::upgrade_lock<boost::shared_mutex> l(mtx);
boost::upgrade_to_unique_lock<boost::shared_mutex> ul(l);
BOOST_CHECK(ul.owns_lock());
}
BOOST_AUTO_TEST_CASE(test_if_other_thread_has_write_lock_try_lock_shared_returns_false)
{
boost::shared_mutex rw_mutex;
boost::mutex finish_mutex;
boost::mutex unblocked_mutex;
unsigned unblocked_count=0;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
boost::thread writer(simple_writing_thread(rw_mutex,finish_mutex,unblocked_mutex,unblocked_count));
boost::this_thread::sleep(boost::posix_time::seconds(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_mutex,unblocked_count,1u);
bool const try_succeeded=rw_mutex.try_lock_shared();
BOOST_CHECK(!try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_shared();
}
finish_lock.unlock();
writer.join();
}
BOOST_AUTO_TEST_CASE(test_if_other_thread_has_write_lock_try_lock_upgrade_returns_false)
{
boost::shared_mutex rw_mutex;
boost::mutex finish_mutex;
boost::mutex unblocked_mutex;
unsigned unblocked_count=0;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
boost::thread writer(simple_writing_thread(rw_mutex,finish_mutex,unblocked_mutex,unblocked_count));
boost::this_thread::sleep(boost::posix_time::seconds(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_mutex,unblocked_count,1u);
bool const try_succeeded=rw_mutex.try_lock_upgrade();
BOOST_CHECK(!try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_upgrade();
}
finish_lock.unlock();
writer.join();
}
BOOST_AUTO_TEST_CASE(test_if_no_thread_has_lock_try_lock_shared_returns_true)
{
boost::shared_mutex rw_mutex;
bool const try_succeeded=rw_mutex.try_lock_shared();
BOOST_CHECK(try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_shared();
}
}
BOOST_AUTO_TEST_CASE(test_if_no_thread_has_lock_try_lock_upgrade_returns_true)
{
boost::shared_mutex rw_mutex;
bool const try_succeeded=rw_mutex.try_lock_upgrade();
BOOST_CHECK(try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_upgrade();
}
}
BOOST_AUTO_TEST_CASE(test_if_other_thread_has_shared_lock_try_lock_shared_returns_true)
{
boost::shared_mutex rw_mutex;
boost::mutex finish_mutex;
boost::mutex unblocked_mutex;
unsigned unblocked_count=0;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
boost::thread writer(simple_reading_thread(rw_mutex,finish_mutex,unblocked_mutex,unblocked_count));
boost::thread::sleep(delay(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_mutex,unblocked_count,1u);
bool const try_succeeded=rw_mutex.try_lock_shared();
BOOST_CHECK(try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_shared();
}
finish_lock.unlock();
writer.join();
}
BOOST_AUTO_TEST_CASE(test_if_other_thread_has_shared_lock_try_lock_upgrade_returns_true)
{
boost::shared_mutex rw_mutex;
boost::mutex finish_mutex;
boost::mutex unblocked_mutex;
unsigned unblocked_count=0;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
boost::thread writer(simple_reading_thread(rw_mutex,finish_mutex,unblocked_mutex,unblocked_count));
boost::thread::sleep(delay(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_mutex,unblocked_count,1u);
bool const try_succeeded=rw_mutex.try_lock_upgrade();
BOOST_CHECK(try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_upgrade();
}
finish_lock.unlock();
writer.join();
}
BOOST_AUTO_TEST_CASE(test_if_other_thread_has_upgrade_lock_try_lock_upgrade_returns_false)
{
boost::shared_mutex rw_mutex;
boost::mutex finish_mutex;
boost::mutex unblocked_mutex;
unsigned unblocked_count=0;
boost::unique_lock<boost::mutex> finish_lock(finish_mutex);
boost::thread writer(simple_upgrade_thread(rw_mutex,finish_mutex,unblocked_mutex,unblocked_count));
boost::this_thread::sleep(boost::posix_time::seconds(1));
CHECK_LOCKED_VALUE_EQUAL(unblocked_mutex,unblocked_count,1u);
bool const try_succeeded=rw_mutex.try_lock_upgrade();
BOOST_CHECK(!try_succeeded);
if(try_succeeded)
{
rw_mutex.unlock_upgrade();
}
finish_lock.unlock();
writer.join();
}
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