Last Nov 22 I asked a question about writable shared memory, everything's working now so thanks!
Locking the shared memory is turning out to be quite costly. I have many shared-memory readers and only a few writers so using a rwlock seems appropriate but APR provides only apr_thread_rwlock routines. Is there a way to use rwlocks between processes rather than threads? Maybe using the standard POSIX pthread_rwlock routines (storing the lock in the shm space...)? Many thanks again Christiaan PS: Apache 2 on Linux apr_shm (for shared memory) prefork MPM (it's non threaded!)
