id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6654	deadline_timer may makes dll can't be freed	weiyuemin@…	chris_kohlhoff	"When I use boost::asio::deadline_timer in a dll, {{{FreeLibrary}}} will be blocked. When I commented the deadline_timer, things become ok.

I compile my program on Visual Studio 2010(without sp), and Win Xp sp3. dll was built as Debug configuration, using /MDd

below is my code in main():
{{{
	HMODULE hmod2 = LoadLibraryA(""tDll2.dll"");
	printf(""tDll2.dll loaded\n"");

	for (;;)
	{
		char cmd[100];
		scanf(""%s"", cmd);

		if (strcmp(cmd, ""init"") == 0)
		{
			void_func _init = (void_func)GetProcAddress(hmod2, ""init"");
			_init();
			printf(""init ok\n"");
		}
		else if (strcmp(cmd, ""uninit"") == 0)
		{
			void_func _uninit = (void_func)GetProcAddress(hmod2, ""uninit"");
			_uninit();
			printf(""uninit ok\n"");
		}
		else if (strcmp(cmd, ""exit"") == 0)
		{
			FreeLibrary(hmod2);
			printf(""tFreeLib.dll free\n"");
			break;
		}
	}
}}}

code of tDll2.cpp in tDll2.dll
{{{

boost::asio::io_service client_ioservice;

boost::asio::io_service::work* client_ioservice_virtual_work;

boost::thread* th;

void run()
{
	boost::asio::deadline_timer timer(client_ioservice);

	boost::system::error_code error;
	
	client_ioservice.run(error);

	if (error)
	{
		printf(""error: %d\n"", error.value());
	}

	delete th;

	printf(""finish\n"");
}

TDLL2_API void init(void)
{
	client_ioservice_virtual_work = new boost::asio::io_service::work(client_ioservice);
	th = new boost::thread(run);
}

TDLL2_API void uninit(void)
{
	delete client_ioservice_virtual_work;
}
}}}

this statement {{{printf(""finish\n""); }}}is successfully executed, the {{{DllMain}}} is also successfully returned, but {{{FreeLibrary(hmod2);}}} blocks.

When I commented this line:
{{{
  boost::asio::deadline_timer timer(client_ioservice);
}}}
things become ok.

"	Bugs	closed	To Be Determined	asio	Boost 1.49.0	Problem	invalid	deadline_timer block