hello i tried to write a memory cache for a file and keep it in sync with the file while threads or foreign processes are writing safely to it. then i found mmap and lockf but the both don't work together. i studied all the other alternatives i found, like fcntl or flockfile, but they don't support the one or the other action. for example, fcntl locks are not based on a per-thread base. flockfile only works on the full FILE object, etc. also, if i don't use mmap, as far as i can see, i have to map the file to a buffer myself, which causes sync-problems especially with foreign processes. how can i reach the same level of features and comfort like with lockf and mmap without one of the both and by staying posix-compliant (at least)? by the way: can i lock sections of a plain memory buffer (mmap'ed or allocated with malloc or whatever) like i can do with fcntl or lockf to have threads not running over eachother? regards, dennis heuer - To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
