Barrier implementation for inter process in shared memory

Question

I am looking for an inter-processes barrier implementation. Processes are in shared memory (ie. on the same ndoe).

Processes are MPI ones. I do not want to use the MPI_Barrier function, because the general policy for all the MPI implementation is active waiting. I want my processes sleeping as long as they wait.

The restrictions:

• should be in C, maybe in C++
• no spinlock, so it could use semaphore
• linux OS

I am confident it exists thousands of barrier implementation, but I do not find any?!

Thanks

Answer 1

pthread_barrier is the POSIX API for barriers. They may live in process shared memory if you initialize them accordingly.

Answer 2

You should check out Boost. I believe that it has an interprocess module that you can use.