On 8/19/2011 4:43 PM, Ion Gaztañaga wrote:
El 20/08/2011 0:54, David Byron escribió:
I've got my machine (Win 7) into a state where using a message queue results in a hang. More specifically, calls to:
scoped_lock
lock(p_hdr->m_mutex); hang forever.
For now, the only thing you can do is using a timed lock, It's not easy to support robust mutexes when using emulated process-shared resources.
Except that the above code is in message_queue.hpp even in try_send or
timed_send. It's in get_num_msg() for example. So short of modifying
message_queue.hpp I'm not sure what to do.
One thing that came to mind is always calling message_queue::remove on
startup. I think that gets passed this problem, but may introduce some
other complications if the two processes that use the message queue
start and end at undefined times in an undefined order. I'm still
trying to test this, but perhaps you can help by answering this question:
If a process is waiting for the mutex like this:
scoped_lock