Re: [Boost-users] [Boost-Threads] Assertion during a second call to thread::join()

Aubrey, Jason wrote:

Hi,

Does anyone know the reason for the behavior in the following example program?

This example attempts to simulate the scenario where two threads wait on a third thread. However, I realize that the following is actually one thread waiting on a second thread twice.

Regards, Jason

My Environment: MSVC 8.0, boost v1.33.1

#include #include

void f() { }

void main() { boost::thread t(f); t.join(); t.join(); // Causes an assertion

A call to thread::join() requires the thread to be joinable. After the first call to join() the thread has finished and is not joinable anymore. If you'd like to execute f twice, create a seperate thread for each run. hth Sascha