merged from trunk

[SVN r45844]

test/test_generic_locks.cpp

@@ -0,0 +1,137 @@
+// (C) Copyright 2008 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)
+
+#include <boost/test/unit_test.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/locks.hpp>
+#include <boost/thread/condition_variable.hpp>
+
+void test_lock_two_uncontended()
+{
+    boost::mutex m1,m2;
+
+    boost::mutex::scoped_lock l1(m1,boost::defer_lock),
+        l2(m2,boost::defer_lock);
+
+    BOOST_CHECK(!l1.owns_lock());
+    BOOST_CHECK(!l2.owns_lock());
+    
+    boost::lock(l1,l2);
+    
+    BOOST_CHECK(l1.owns_lock());
+    BOOST_CHECK(l2.owns_lock());
+}
+
+struct wait_data
+{
+    boost::mutex m;
+    bool flag;
+    boost::condition_variable cond;
+    
+    wait_data():
+        flag(false)
+    {}
+    
+    void wait()
+    {
+        boost::mutex::scoped_lock l(m);
+        while(!flag)
+        {
+            cond.wait(l);
+        }
+    }
+
+    template<typename Duration>
+    bool timed_wait(Duration d)
+    {
+        boost::system_time const target=boost::get_system_time()+d;
+        
+        boost::mutex::scoped_lock l(m);
+        while(!flag)
+        {
+            if(!cond.timed_wait(l,target))
+            {
+                return flag;
+            }
+        }
+        return true;
+    }
+    
+    void signal()
+    {
+        boost::mutex::scoped_lock l(m);
+        flag=true;
+        cond.notify_all();
+    }
+};
+       
+
+void lock_mutexes_slowly(boost::mutex* m1,boost::mutex* m2,wait_data* locked,wait_data* quit)
+{
+    boost::lock_guard<boost::mutex> l1(*m1);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(500));
+    boost::lock_guard<boost::mutex> l2(*m2);
+    locked->signal();
+    quit->wait();
+}
+
+void lock_pair(boost::mutex* m1,boost::mutex* m2)
+{
+    boost::lock(*m1,*m2);
+    boost::mutex::scoped_lock l1(*m1,boost::adopt_lock),
+        l2(*m2,boost::adopt_lock);
+}
+
+void test_lock_two_other_thread_locks_in_order()
+{
+    boost::mutex m1,m2;
+    wait_data locked;
+    wait_data release;
+    
+    boost::thread t(lock_mutexes_slowly,&m1,&m2,&locked,&release);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(10));
+
+    boost::thread t2(lock_pair,&m1,&m2);
+    BOOST_CHECK(locked.timed_wait(boost::posix_time::seconds(1)));
+
+    release.signal();
+    
+    BOOST_CHECK(t2.timed_join(boost::posix_time::seconds(1)));
+
+    t.join();
+}
+
+void test_lock_two_other_thread_locks_in_opposite_order()
+{
+    boost::mutex m1,m2;
+    wait_data locked;
+    wait_data release;
+    
+    boost::thread t(lock_mutexes_slowly,&m1,&m2,&locked,&release);
+    boost::this_thread::sleep(boost::posix_time::milliseconds(10));
+
+    boost::thread t2(lock_pair,&m2,&m1);
+    BOOST_CHECK(locked.timed_wait(boost::posix_time::seconds(1)));
+
+    release.signal();
+    
+    BOOST_CHECK(t2.timed_join(boost::posix_time::seconds(1)));
+
+    t.join();
+}
+
+
+boost::unit_test_framework::test_suite* init_unit_test_suite(int, char*[])
+{
+    boost::unit_test_framework::test_suite* test =
+        BOOST_TEST_SUITE("Boost.Threads: generic locks test suite");
+
+    test->add(BOOST_TEST_CASE(&test_lock_two_uncontended));
+    test->add(BOOST_TEST_CASE(&test_lock_two_other_thread_locks_in_order));
+    test->add(BOOST_TEST_CASE(&test_lock_two_other_thread_locks_in_opposite_order));
+
+    return test;
+}