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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/config.hpp>
#if defined( BOOST_NO_EXCEPTIONS )
# error This program requires exception handling.
#endif
#include <boost/exception_ptr.hpp>
#include <boost/exception/info.hpp>
#include <boost/exception/get_error_info.hpp>
#include <boost/exception/diagnostic_information.hpp>
#include <boost/function.hpp>
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <boost/detail/atomic_count.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <iostream>
class thread_handle;
boost::shared_ptr<thread_handle> create_thread( boost::function<void()> const & f );
void join( thread_handle & t );
class
thread_handle
{
thread_handle( thread_handle const & );
thread_handle & operator=( thread_handle const & );
boost::exception_ptr err_;
boost::thread t_;
static
void
thread_wrapper( boost::function<void()> const & f, boost::exception_ptr & ep )
{
BOOST_ASSERT(!ep);
try
{
f();
}
catch(...)
{
ep = boost::current_exception();
}
}
explicit
thread_handle( boost::function<void()> const & f ):
t_(boost::bind(thread_wrapper,f,boost::ref(err_)))
{
}
friend boost::shared_ptr<thread_handle> create_thread( boost::function<void()> const & f );
friend void join( thread_handle & t );
};
boost::shared_ptr<thread_handle>
create_thread( boost::function<void()> const & f )
{
boost::shared_ptr<thread_handle> t( new thread_handle(f) );
return t;
}
void
join( thread_handle & t )
{
t.t_.join();
assert(t.err_);
rethrow_exception(t.err_);
}
boost::detail::atomic_count exc_count(0);
struct
exc:
virtual boost::exception,
virtual std::exception
{
exc()
{
++exc_count;
}
exc( exc const & e ):
boost::exception(e),
std::exception(e)
{
++exc_count;
}
virtual
~exc() BOOST_NOEXCEPT_OR_NOTHROW
{
--exc_count;
}
private:
exc & operator=( exc const & );
};
typedef boost::error_info<struct answer_,int> answer;
void
thread_func()
{
BOOST_THROW_EXCEPTION(exc() << answer(42));
}
void
check( boost::shared_ptr<thread_handle> const & t )
{
try
{
join(*t);
BOOST_TEST(false);
}
catch(
exc & e )
{
int const * a = boost::get_error_info<answer>(e);
BOOST_TEST(a && *a==42);
}
}
void
test_deep_copy()
{
int const * p1=0;
boost::exception_ptr p;
try
{
BOOST_THROW_EXCEPTION(exc() << answer(42));
BOOST_ERROR("BOOST_THROW_EXCEPTION didn't throw");
}
catch(
exc & e )
{
p1=boost::get_error_info<answer>(e);
p=boost::current_exception();
}
BOOST_TEST(p1!=0);
BOOST_TEST(p);
try
{
boost::rethrow_exception(p);
BOOST_ERROR("rethrow_exception didn't throw");
}
catch(
exc & e )
{
int const * p2=boost::get_error_info<answer>(e);
BOOST_TEST(p2!=0 && *p2==42);
BOOST_TEST(p2!=p1);
}
}
int
main()
{
test_deep_copy();
BOOST_TEST(++exc_count==1);
try
{
std::vector< boost::shared_ptr<thread_handle> > threads;
std::generate_n(std::inserter(threads,threads.end()),1,boost::bind(create_thread,thread_func));
std::for_each(threads.begin(),threads.end(),check);
return boost::report_errors();
}
catch(
... )
{
std::cerr <<
"Caught unexpected exception.\n"
"Output from current_exception_diagnostic_information:\n" <<
boost::current_exception_diagnostic_information() << std::endl;
return 42;
}
BOOST_TEST(!--exc_count);
}
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