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c++csynchronizationsemaphorebarrier

Barrier implementation for inter process in shared memory

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

Solution

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