boost ptime: crash in multithread application

[daniele]

I compiled the following code with mingw, but it crashes after some
seconds of execution.
Maybe the operator << with ptime is not thread safe?
I tried the same code with MS Visual C++ and it works.

#include <boost/thread.hpp>
#include <iostream>
#include <sstream>
#include <boost/date_time/posix_time/posix_time.hpp>

using namespace boost:osix_time;

void f()
{
while ( true )
{
std:stringstream os;
ptime t( second_clock::local_time() );
os << t;
}
}

int main( int argc, char* argv[] )
{
boost::thread t1( f );
boost::thread t2( f );

system( "PAUSE" );

return 0;
}

 

[Marc Zinnschlag]

I compiled the following code with mingw, but it crashes after some
seconds of execution.
Maybe the operator << with ptime is not thread safe?
I tried the same code with MS Visual C++ and it works.

There is a gcc 3.x based version of mingw out there, that had a bug in
the stringstream implementation, which would cause random crashes when
using stringstreams with floating point numbers in a multi-threading
situation (even when each thread used its own stringstream). Can't find
the reference right now, but I experienced this bug myself.

You could try to upgrade your compiler (maybe to something gcc 4.x
based) and test it again.

 

[Chris Ahlstrom]

daniele pulled this Usenet boner:

I compiled the following code with mingw, but it crashes after some
seconds of execution.
Maybe the operator << with ptime is not thread safe?
I tried the same code with MS Visual C++ and it works.

Run your code under valgrind.

 

[Chris Ahlstrom]

daniele pulled this Usenet boner:

I compiled the following code with mingw, but it crashes after some
seconds of execution.
Maybe the operator << with ptime is not thread safe?
I tried the same code with MS Visual C++ and it works.

Run your code under valgrind.

That is, if it also crashes under Linux. I don't think there is a valgrind
for Windows, still.