id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
4078,interrupt()ion of threads in timed_wait() of a condition variable has unexpected side effects,Sebastian Kienzl <seb@…>,Anthony Williams,"If multiple threads are waiting on a condition variable with timed_wait() then interrupt()ing one them makes timed_wait() return {{{true}}} in another thread. Happens under Linux, not tested under Windows.

I haven't tested it with version later than 1.39.0 but couldn't find a ticket reporting that bug or any mention of it in the changelog.

{{{
#include <boost/thread.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <iostream>

using namespace std;
using namespace boost;

condition_variable cv;
mutex mut;

void test_thread( const char* name )
{
	try {
		mutex::scoped_lock lock( mut );
		cout << name << "" timed_wait: "" <<
			cv.timed_wait( lock, posix_time::time_duration( 0, 20, 0 ) ) << endl;
	}
	catch( thread_interrupted& ) {
		cout << name << "" interrupted"" << endl;
	}
}


int main()
{
	thread thread1( test_thread, ""1"" );
	thread thread2( test_thread, ""2"" );


	sleep( 1 );
	cout << ""intr 1"" << endl;
	thread1.interrupt();
	sleep( 1 );
	cout << ""intr 2"" << endl;
	thread2.interrupt();
	sleep( 1 );

	thread1.join();
	thread2.join();

	return 0;
}
}}}
",Bugs,closed,Boost 1.43.0,thread,Boost 1.39.0,Problem,invalid,,