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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" 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 names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- #ifndef APACHE_HTTP_MAIN_H
- #define APACHE_HTTP_MAIN_H
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /*
- * Routines in http_main.c which other code --- in particular modules ---
- * may want to call. Right now, that's limited to timeout handling.
- * There are two functions which modules can call to trigger a timeout
- * (with the per-virtual-server timeout duration); these are hard_timeout
- * and soft_timeout.
- *
- * The difference between the two is what happens when the timeout
- * expires (or earlier than that, if the client connection aborts) ---
- * a soft_timeout just puts the connection to the client in an
- * "aborted" state, which will cause http_protocol.c to stop trying to
- * talk to the client, but otherwise allows the code to continue normally.
- * hard_timeout(), by contrast, logs the request, and then aborts it
- * completely --- longjmp()ing out to the accept() loop in http_main.
- * Any resources tied into the request's resource pool will be cleaned up;
- * everything that isn't will leak.
- *
- * soft_timeout() is recommended as a general rule, because it gives your
- * code a chance to clean up. However, hard_timeout() may be the most
- * convenient way of dealing with timeouts waiting for some external
- * resource other than the client, if you can live with the restrictions.
- *
- * (When a hard timeout is in scope, critical sections can be guarded
- * with block_alarms() and unblock_alarms() --- these are declared in
- * alloc.c because they are most often used in conjunction with
- * routines to allocate something or other, to make sure that the
- * cleanup does get registered before any alarm is allowed to happen
- * which might require it to be cleaned up; they * are, however,
- * implemented in http_main.c).
- *
- * NOTE! It's not "fair" for a hard_timeout to be in scope through calls
- * across modules. Your module code really has no idea what other modules may
- * be present in the server, and they may not take too kindly to having a
- * longjmp() happen -- it could result in corrupted state. Heck they may not
- * even take to kindly to a soft_timeout()... because it can cause EINTR to
- * happen on pretty much any syscall, and unless all the libraries and modules
- * in use are known to deal well with EINTR it could cause corruption as well.
- * But things are likely to do much better with a soft_timeout in scope than a
- * hard_timeout.
- *
- * A module MAY NOT use a hard_timeout() across * sub_req_lookup_xxx()
- * functions, or across run_sub_request() functions. A module SHOULD NOT use a
- * soft_timeout() in either of these cases, but sometimes there's just no
- * choice.
- *
- * kill_timeout() will disarm either variety of timeout.
- *
- * reset_timeout() resets the timeout in progress.
- */
-
- API_EXPORT(void) ap_start_shutdown(void);
- API_EXPORT(void) ap_start_restart(int);
- API_EXPORT(void) ap_hard_timeout(char *, request_rec *);
- void ap_keepalive_timeout(char *, request_rec *);
- API_EXPORT(void) ap_soft_timeout(char *, request_rec *);
- API_EXPORT(void) ap_kill_timeout(request_rec *);
- API_EXPORT(void) ap_reset_timeout(request_rec *);
-
- API_EXPORT(void) ap_child_terminate(request_rec *r);
- API_EXPORT(void) ap_sync_scoreboard_image(void);
- int ap_update_child_status(int child_num, int status, request_rec *r);
- void ap_time_process_request(int child_num, int status);
- #ifdef EAPI
- API_EXPORT(unsigned int) ap_set_callback_and_alarm(void (*fn) (int), int x);
- #else
- unsigned int ap_set_callback_and_alarm(void (*fn) (int), int x);
- #endif
- API_EXPORT(int) ap_check_alarm(void);
-
- void setup_signal_names(char *prefix);
-
- #ifndef NO_OTHER_CHILD
- /*
- * register an other_child -- a child which the main loop keeps track of
- * and knows it is different than the rest of the scoreboard.
- *
- * pid is the pid of the child.
- *
- * maintenance is a function that is invoked with a reason, the data
- * pointer passed here, and when appropriate a status result from waitpid().
- *
- * write_fd is an fd that is probed for writing by select() if it is ever
- * unwritable, then maintenance is invoked with reason OC_REASON_UNWRITABLE.
- * This is useful for log pipe children, to know when they've blocked. To
- * disable this feature, use -1 for write_fd.
- */
- API_EXPORT(void) ap_register_other_child(int pid,
- void (*maintenance) (int reason, void *data, ap_wait_t status), void *data,
- int write_fd);
- #define OC_REASON_DEATH 0 /* child has died, caller must call
- * unregister still */
- #define OC_REASON_UNWRITABLE 1 /* write_fd is unwritable */
- #define OC_REASON_RESTART 2 /* a restart is occuring, perform
- * any necessary cleanup (including
- * sending a special signal to child)
- */
- #define OC_REASON_UNREGISTER 3 /* unregister has been called, do
- * whatever is necessary (including
- * kill the child) */
- #define OC_REASON_LOST 4 /* somehow the child exited without
- * us knowing ... buggy os? */
-
- /*
- * unregister an other_child. Note that the data pointer is used here, and
- * is assumed to be unique per other_child. This is because the pid and
- * write_fd are possibly killed off separately.
- */
- API_EXPORT(void) ap_unregister_other_child(void *data);
-
- #endif
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* !APACHE_HTTP_MAIN_H */
-