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//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
//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/exception_ptr.hpp>
#include <boost/exception/get_error_info.hpp>
#include <boost/thread.hpp>
#include <boost/detail/atomic_count.hpp>
#include <boost/detail/lightweight_test.hpp>
typedef boost::error_info<struct tag_answer,int> answer;
boost::detail::atomic_count exc_count(0);
struct
err:
virtual boost::exception,
virtual std::exception
{
err()
{
++exc_count;
}
err( err const & )
{
++exc_count;
}
virtual
~err() BOOST_NOEXCEPT_OR_NOTHROW
{
--exc_count;
}
private:
err & operator=( err const & );
};
class
future
{
public:
future ():
ready_ (false)
{
}
void
set_exception( boost::exception_ptr const & e )
{
boost::unique_lock<boost::mutex> lck (mux_);
exc_ = e;
ready_ = true;
cond_.notify_all();
}
void
get_exception() const
{
boost::unique_lock<boost::mutex> lck (mux_);
while (! ready_)
cond_.wait (lck);
rethrow_exception (exc_);
}
private:
bool ready_;
boost::exception_ptr exc_;
mutable boost::mutex mux_;
mutable boost::condition_variable cond_;
};
void
producer( future & f )
{
f.set_exception (boost::copy_exception (err () << answer(42)));
}
void
consumer()
{
future f;
boost::thread thr (boost::bind (&producer, boost::ref (f)));
try
{
f.get_exception ();
}
catch(
err & e )
{
int const * ans=boost::get_error_info<answer>(e);
BOOST_TEST(ans && *ans==42);
}
thr.join();
}
void
consume()
{
for( int i=0; i!=100; ++i )
consumer();
}
void
thread_test()
{
boost::thread_group grp;
for( int i=0; i!=50; ++i )
grp.create_thread(&consume);
grp.join_all ();
}
void
simple_test()
{
boost::exception_ptr p = boost::copy_exception(err());
try
{
rethrow_exception(p);
BOOST_TEST(false);
}
catch(
err & )
{
}
catch(
... )
{
BOOST_TEST(false);
}
}
int
main()
{
BOOST_TEST(++exc_count==1);
simple_test();
thread_test();
BOOST_TEST(!--exc_count);
return boost::report_errors();
}
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