On 7/21/2010 3:45 AM, Dietmar Hummel wrote:
condition_variable::notify_all() calls wake_waiters() but does further tasks after this call (I assume that wake_waiters() is doing the real signalling by the os?). But if I have the task switch fast enough, it may happen that my doSomething() method runs out of scope deleting cSyncObject which is itself deleting the condition_variable. So the vector iteration code in condition_variable::notify_all() crashes because the object is already destroyed...
Any help or good hints are appreciated...
Yup, I've gotten burned by exactly that before. It was a bitch to find. You can either 1) Set up your sync object outside both functions. 2) Used shared_ptr to pass a pointer to the sync object to the second function. When I first discovered the problem, I will warn you: I spent a couple of hours trying to engineer a solution in which case (2) worked. It's doable, but things got messy. Just do (1) in your setup code.