void test_try_sharable_mutex()
{
SM mtx;
data<SM> s1(1);
data<SM> e1(2);
data<SM> e2(3);
// We start with some specialized tests for "try" behavior
shared_val = 0;
// Writer one launches, holds the lock for 3*BaseSeconds seconds.
boost::thread tw1(thread_adapter<SM>(try_exclusive,&e1,mtx));
// Reader one launches, "clearly" after writer #1 holds the lock
// and before it releases the lock.
boost::thread::sleep(xsecs(1*BaseSeconds));
boost::thread thr1(thread_adapter<SM>(try_shared,&s1,mtx));
// Writer two launches in the same timeframe.
boost::thread tw2(thread_adapter<SM>(try_exclusive,&e2,mtx));
tw2.join();
thr1.join();
tw1.join();
BOOST_INTERPROCES_CHECK(e1.m_value == 10);
BOOST_INTERPROCES_CHECK(s1.m_value == -1); // Try would return w/o waiting
BOOST_INTERPROCES_CHECK(e2.m_value == -1); // Try would return w/o waiting
}
inline void dont_create_and_open()
{
//Try to open it without creating
try{
NamedResource nresource1(open_only);
}
catch(interprocess_exception &err){
BOOST_INTERPROCES_CHECK(err.get_error_code() == not_found_error);
return;
}
//The mutex should not exist
BOOST_INTERPROCES_CHECK(false);
}
inline void open_or_create_then_create()
{
//Create it with open_or_create and try to create it twice
NamedResource nresource1(open_or_create);
try{
NamedResource nresource2(create_only);
}
catch(interprocess_exception &err){
BOOST_INTERPROCES_CHECK(err.get_error_code() == already_exists_error);
}
}
void test_timed_sharable_mutex()
{
SM mtx;
data<SM> s1(1,1*BaseSeconds);
data<SM> s2(2,3*BaseSeconds);
data<SM> e1(3,3*BaseSeconds);
data<SM> e2(4,1*BaseSeconds);
// We begin with some specialized tests for "timed" behavior
shared_val = 0;
// Writer one will hold the lock for 3*BaseSeconds seconds.
boost::thread tw1(thread_adapter<SM>(timed_exclusive,&e1,mtx));
boost::thread::sleep(xsecs(1*BaseSeconds));
// Writer two will "clearly" try for the lock after the readers
// have tried for it. Writer will wait up 1*BaseSeconds seconds for the lock.
// This write will fail.
boost::thread tw2(thread_adapter<SM>(timed_exclusive,&e2,mtx));
// Readers one and two will "clearly" try for the lock after writer
// one already holds it. 1st reader will wait 1*BaseSeconds seconds, and will fail
// to get the lock. 2nd reader will wait 3*BaseSeconds seconds, and will get
// the lock.
boost::thread thr1(thread_adapter<SM>(timed_shared,&s1,mtx));
boost::thread thr2(thread_adapter<SM>(timed_shared,&s2,mtx));
tw1.join();
thr1.join();
thr2.join();
tw2.join();
BOOST_INTERPROCES_CHECK(e1.m_value == 10);
BOOST_INTERPROCES_CHECK(s1.m_value == -1);
BOOST_INTERPROCES_CHECK(s2.m_value == 10);
BOOST_INTERPROCES_CHECK(e2.m_value == -1);
}
inline void create_then_open_then_open_or_create()
{
try{
//Create it and open it twice
NamedResource nresource1(create_only);
NamedResource nresource2(open_only);
NamedResource nresource3(open_or_create);
}
catch(...){
//This shouldn't throw so show the error
BOOST_INTERPROCES_CHECK( false );
}
}
void test_plain_sharable_mutex()
{
{
shared_val = 0;
SM mtx;
data<SM> s1(1);
data<SM> s2(2);
data<SM> e1(1);
data<SM> e2(2);
// Writer one launches, holds the lock for 3*BaseSeconds seconds.
boost::thread tw1(thread_adapter<SM>(plain_exclusive, &e1, mtx));
// Writer two launches, tries to grab the lock, "clearly"
// after Writer one will already be holding it.
boost::thread::sleep(xsecs(1*BaseSeconds));
boost::thread tw2(thread_adapter<SM>(plain_exclusive, &e2, mtx));
// Reader one launches, "clearly" after writer two, and "clearly"
// while writer 1 still holds the lock
boost::thread::sleep(xsecs(1*BaseSeconds));
boost::thread thr1(thread_adapter<SM>(plain_shared,&s1, mtx));
boost::thread thr2(thread_adapter<SM>(plain_shared,&s2, mtx));
thr2.join();
thr1.join();
tw2.join();
tw1.join();
//We can only assure that the writer will be first
BOOST_INTERPROCES_CHECK(e1.m_value == 10);
//A that we will execute all
BOOST_INTERPROCES_CHECK(s1.m_value == 20 || s2.m_value == 20 || e2.m_value == 20);
}
{
shared_val = 0;
SM mtx;
data<SM> s1(1, 3);
data<SM> s2(2, 3);
data<SM> e1(1);
data<SM> e2(2);
//We launch 2 readers, that will block for 3*BaseTime seconds
boost::thread thr1(thread_adapter<SM>(plain_shared,&s1, mtx));
boost::thread thr2(thread_adapter<SM>(plain_shared,&s2, mtx));
//Make sure they try to hold the sharable lock
boost::thread::sleep(xsecs(1*BaseSeconds));
// We launch two writers, that should block until the readers end
boost::thread tw1(thread_adapter<SM>(plain_exclusive,&e1, mtx));
boost::thread tw2(thread_adapter<SM>(plain_exclusive,&e2, mtx));
thr2.join();
thr1.join();
tw2.join();
tw1.join();
//We can only assure that the shared will finish first...
BOOST_INTERPROCES_CHECK(s1.m_value == 0 || s2.m_value == 0);
//...and writers will be mutually excluded after readers
BOOST_INTERPROCES_CHECK((e1.m_value == 10 && e2.m_value == 20) ||
(e1.m_value == 20 && e2.m_value == 10) );
}
}
