[Mingw-users] Thread safety problem with stringstreams

[Jeremy G. <jn...@nt...>]

Hi,

The following code is crashing:

#include <sstream>
#include <windows.h>

unsigned long __stdcall threadFunc(void* pThis)
{
	while (1)
	{
		std::ostringstream strm;
		strm << 999;
	}
}

int main(int argc, char* argv[])
{
	::CreateThread(NULL, 0, threadFunc, 0, 0, NULL);
	::CreateThread(NULL, 0, threadFunc, 0, 0, NULL);

	while (1)
		::Sleep(1000);
}

It seems that the numeric output to the stringstream is not thread safe.
Character output seems to be OK. Does anyone know anything about this? I'm
compiling with -mthreads -g.

Regards
Jeremy Godfrey

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