2010/9/7 HADASS YAARI <[email protected]>: > Hi Wim, > > I have a few questions regarding the threads created by the WT library: > > 1. How many threads are created? >
That depends on compilation and configuration options. - If MULTI_THREADED is set to OFF during cmake configuration, Wt will not rely on any threading functionality. It will not create any thread and will not use any locking primitives. Modifcation of the widget tree outside of the thread that the server is started in is not possible, as you cannot protect the widget tree from concurrent access - If MULTI_THREADED is ON (the default), wt creates a thread pool. The size of this thread pool is configured in wt_config.xml for the fcgi connector and the isapi connector, or as a command line parameter for the http connector (run your program with --help to see all options). - When using the http the main thread is usually (default implemenation of WRun()) used to wait until the server is terminated by calling WServer::waitForShutdown() (e.g. Ctrl-C, SIGHUP, ...), but is never part of the threadpool that processes requests. You can use the main thread for anything else if you don't want to do this by reimplementing WRun - When using the fcgi connector, the main thread is unused after starting up the server. It never returns, - The isapi connector has no 'main' thread, only the application pool, which is created when the extension is loaded in IIS > 2. When are they created? > The threadpool is created shortly after calling WServer::start() > 3. When are they released? > Threads are joined when the server is stopped by calling WServer::stop(). stop() will therefore only return after the threads are 'released' > 4. What is their default priority, and how can I change it? > Wt does not set the thread's priority. Changing the thread's priority is OS dependent; the best method to implement this is currently to set the right priority by reimplementing WApplication::notify() BR, Wim. ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ witty-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/witty-interest
