beos.c revision 56ed3e7e5a5032e0a3d31ec5cf0438cc1b88f3b4
* the documentation and/or other materials provided with the * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * 4. The names "Apache" and "Apache Software Foundation" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact apache@apache.org. * 5. Products derived from this software may not be called "Apache", * nor may "Apache" appear in their name, without prior written * permission of the Apache Software Foundation. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * ==================================================================== * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * Portions of this software are based upon public domain software * originally written at the National Center for Supercomputing Applications, * University of Illinois, Urbana-Champaign. * This one basically is a single process multi threaded model, but * I couldn't be bothered adding the spmt_ to the front of the name! * Anyway, this is still under development so it isn't yet the default * Actual definitions of config globals /* Keep track of the number of worker threads currently active */ /* The structure used to pass unique initialization info to each thread */ * The max child slot ever assigned, preserved across restarts. Necessary * to deal with MaxClients changes across SIGWINCH restarts. We use this * value to optimize routines that have to scan the entire scoreboard. /* shared http_main globals... */ /* a clean exit from a child with proper cleanup static void clean_child_exit(int code) __attribute__ ((noreturn)); */ /* handle all varieties of core dumping signals */ /* At this point we've got sig blocked, because we're still inside * the signal handler. When we leave the signal handler it will * be unblocked, and we'll take the signal... and coredump or whatever * is appropriate for this particular Unix. In addition the parent * will see the real signal we received -- whereas if we called * abort() here, the parent would only see SIGABRT. /***************************************************************** * Connection structures and accounting... /* volatile just in case */ * ap_start_shutdown() and ap_start_restart(), below, are a first stab at * functions to initiate shutdown or restart without relying on signals. * Previously this was initiated in sig_term() and restart() signal handlers, * e.g. on Win32, from the service manager. Now the service manager can * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that * these functions can also be called by the child processes, since global * variables are no longer used to pass on the required action to the parent. * These should only be called from the parent process itself, since the * parent process will use the shutdown_pending and restart_pending variables * to determine whether to shutdown or restart. The child process should * call signal_parent() directly to tell the parent to die -- this will * cause neither of those variable to be set, which the parent will * assume means something serious is wrong (which it will be, for the * child to force an exit) and so do an exit anyway. /* Um, is this _probably_ not an error, if the user has * tried to do a shutdown twice quickly, so we won't * worry about reporting it. /* do a graceful restart if graceful == 1 */ /* Probably not an error - don't bother reporting it */ /* we want to ignore HUPs and WINCH while we're busy processing one */ /***************************************************************** * Here follows a long bunch of generic server bookkeeping stuff... /* XXX - Does this really work? - Manoj */ /***************************************************************** * Child process main loop. "filedescriptor (%u) larger than FD_SETSIZE (%u) " "found, you probably need to rebuild Apache with a " /* each worker thread is in control of it's own destiny...*/ /* block the signals for this thread */ /* poll() will only return errors in catastrophic * circumstances. Let's try exiting gracefully, for now. */ "malloc: out of memory");
"spawn_thread: Unable to start a new thread");
/* In case system resources are maxxed out, we don't want * Apache running away with the CPU trying to fork over and * over and over again. */ /* start up a bunch of children */ * spawn_rate is the number of children that will be spawned on the * next maintenance cycle if there aren't enough idle servers. It is * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by * without the need to spawn. /* initialize the free_list */ /* the next time around we want to spawn twice as many if this * wasn't good enough, but not if we've just done a graceful /* non-fatal death... note that it's gone in the scoreboard. */ /* we're still doing a 1-for-1 replacement of dead * children with new children /* Great, we've probably just lost a slot in the * scoreboard. Somehow we don't know about this "long lost child came home! (pid %ld)",
pid.
pid);
/* Don't perform idle maintenance when a child dies, * only do it when there's a timeout. Remember only a * finite number of children can die, and it's pretty * pathological for a lot to die suddenly. /* we hit a 1 second timeout in which none of the previous * generation of children needed to be reaped... so assume * they're all done, and pick up the slack if any is left. /* In any event we really shouldn't do the code below because * few of the servers we just started are in the IDLE state * yet, so we'd mistakenly create an extra server. "couldn't create control socket, shutting down");
/* now build the udp sockaddr_in structure... */ "couldn't bind the control socket, shutting down");
"no listening sockets available, shutting down");
* used to lock around select so we only have one thread /* tsch tsch, can't have more than one thread in the accept loop at a time so we need to fall on our sword... */ "Couldn't create accept lock");
/* worker_thread_count_mutex * locks the worker_thread_count so we have ana ccurate count... "Couldn't create worker thread count lock");
/* Sanity checks to avoid thrashing... */ /* If we're doing a graceful_restart then we're going to see a lot * of threads exiting immediately when we get into the main loop * below (because we just sent them SIGWINCH). This happens pretty * rapidly... and for each one that exits we'll start a new one until * we reach at least threads_min_free. But we may be permitted to * start more than that, so we'll just keep track of how many we're * supposed to start up without the 1 second penalty between each fork. /* sanity check on the number to start... */ /* setup the child pool to use for the workers. Each worker creates * a seperate pool of it's own to use. /* Now that we have the child pool (pchild) we can allocate * the listenfds and creat the pollset... /* we assume all goes OK...hmm might want to check that! */ /* give the system some time to recover before kicking into * record that we've entered the world ! "%s configured -- resuming normal operations",
* main_loop until it's all over sleep(
1);
/* give them a brief chance to exit */ /* close the UDP socket we've been using... */ * If we get here we're shutting down... /* Time to gracefully shut down: * Kill child processes, tell them to call child_exit, etc... /* cleanup pid file on normal shutdown */ "removed PID file %s (pid=%ld)",
/* use ap_reclaim_child_processes starting with SIGTERM */ /* record the shutdown in the log */ "caught SIGTERM, shutting down");
/* we've been told to restart */ "SIGWINCH received. Doing graceful restart");
/* Kill 'em all. Since the child acts the same on the parents SIGTERM * and a SIGHUP, we may as well use the same signal, because some user * pthreads are stealing signals from us left and right. "SIGHUP received. Attempting to restart");
/* just before we go, tidy up the locks we've created to prevent a * potential leak of semaphores... */ /* sigh, want this only the second time around */ return "PidFile directive not allowed in <VirtualHost>";
"WARNING: detected MinSpareThreads set to non-positive.");
"Resetting to 1 to avoid almost certain Apache failure.");
"Please read the documentation.");
"WARNING: MaxClients of %d exceeds compile time limit " " lowering MaxClients to %d. To increase, please " "WARNING: Require MaxClients > 0, setting to 1");
"WARNING: ThreadsPerChild of %d exceeds compile time" " lowering ThreadsPerChild to %d. To increase, please" "WARNING: Require ThreadsPerChild > 0, setting to 1");
" does not exist or is not a directory",
NULL);
"A file for logging the server process ID"),
"A file for Apache to maintain runtime process management information"),
"Number of child processes launched at server startup"),
"Minimum number of idle children, to handle request spikes"),
"Maximum number of idle children" ),
"Maximum number of children alive at the same time" ),
"Number of threads each child creates" ),
"Maximum number of requests a particular child serves before dying." ),
"The location of the directory Apache changes to before dumping core" ),
NULL,
/* hook to run before apache parses args */ NULL,
/* create per-directory config structure */ NULL,
/* merge per-directory config structures */ NULL,
/* create per-server config structure */ NULL,
/* merge per-server config structures */