Re: [libvirt-users] method for communication between containers
On Wed, Apr 09, 2014 at 05:55:57AM +0000, WANG Cheng D wrote:
Dear Daniel,
As you know, following your suggestion, I can expose shared memory to
two containers hosted by the same machine, thus the two containers can
exchange data. Now I have a new problem: how does the containers avoid
concurrent accesses to the shared memory? In a native system, this can
be achieved by using semaphore. But I don't know how the two containers
can see the same semaphore. Do I need to design a mechanism to control
the access to the shared memory?
Correct, there's no way to share semaphores. Since you hav shared
memory though, can you use a POSIX process shared mutex that is
allocated in that shared memory block.
Regards,
Daniel
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