Updated confusing and jumbled source formatting to something approximating OpenBSD's Kernel Normal Form
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tedbullock
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@ -1,36 +1,34 @@
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/*
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httperf -- a tool for measuring web server performance
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Copyright 2000-2007 Hewlett-Packard Company and Contributors listed in
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AUTHORS file. Originally contributed by David Mosberger-Tang
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This file is part of httperf, a web server performance measurment
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tool.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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In addition, as a special exception, the copyright holders give
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permission to link the code of this work with the OpenSSL project's
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"OpenSSL" library (or with modified versions of it that use the same
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license as the "OpenSSL" library), and distribute linked combinations
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including the two. You must obey the GNU General Public License in
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all respects for all of the code used other than "OpenSSL". If you
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modify this file, you may extend this exception to your version of the
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file, but you are not obligated to do so. If you do not wish to do
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so, delete this exception statement from your version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA
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*/
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* httperf -- a tool for measuring web server performance Copyright 2000-2007
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* Hewlett-Packard Company and Contributors listed in AUTHORS file. Originally
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* contributed by David Mosberger-Tang
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*
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* This file is part of httperf, a web server performance measurment tool.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* In addition, as a special exception, the copyright holders give permission
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* to link the code of this work with the OpenSSL project's "OpenSSL" library
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* (or with modified versions of it that use the same license as the "OpenSSL"
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* library), and distribute linked combinations including the two. You must
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* obey the GNU General Public License in all respects for all of the code
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* used other than "OpenSSL". If you modify this file, you may extend this
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* exception to your version of the file, but you are not obligated to do so.
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* If you do not wish to do so, delete this exception statement from your
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <assert.h>
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#include <errno.h>
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@ -46,171 +44,165 @@
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#define WHEEL_SIZE 4096
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#if 1
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static Time now;
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static Time now;
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#endif
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static Time next_tick;
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static Timer *timer_free_list = 0;
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static Timer *t_curr = 0;
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static Time next_tick;
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static Timer *timer_free_list = 0;
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static Timer *t_curr = 0;
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/* What a wheel is made of, no? */
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/*
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* What a wheel is made of, no?
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*/
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static Timer_Queue wheel[WHEEL_SIZE], *curr = 0;
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static void
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done (Timer *t)
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done(Timer * t)
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{
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t->q.next = timer_free_list;
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t->q.prev = 0;
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timer_free_list = t;
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t->q.next = timer_free_list;
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t->q.prev = 0;
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timer_free_list = t;
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}
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Time
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timer_now_forced (void)
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timer_now_forced(void)
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{
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struct timeval tv;
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struct timeval tv;
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gettimeofday (&tv, 0);
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return tv.tv_sec + tv.tv_usec*1e-6;
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gettimeofday(&tv, 0);
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return tv.tv_sec + tv.tv_usec * 1e-6;
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}
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Time
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timer_now (void)
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timer_now(void)
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{
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if(param.use_timer_cache)
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return now;
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else
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return timer_now_forced ();
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if (param.use_timer_cache)
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return now;
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else
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return timer_now_forced();
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}
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void
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timer_init (void)
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timer_init(void)
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{
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now = timer_now_forced ();
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memset (wheel, 0, sizeof (wheel));
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next_tick = timer_now () + TIMER_INTERVAL;
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curr = wheel;
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}
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void
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timer_tick (void)
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{
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Timer *t, *t_next;
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assert (!t_curr);
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now = timer_now_forced ();
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while (timer_now () >= next_tick)
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{
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for (t = curr->next; t && t->delta == 0; t = t_next)
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{
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t_curr = t;
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(*t->func) (t, t->arg);
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t_next = t->q.next;
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done (t);
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}
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t_curr = 0;
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curr->next = t;
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if (t)
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{
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t->q.prev = (Timer *) curr;
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--t->delta;
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}
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next_tick += TIMER_INTERVAL;
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if (++curr >= wheel + WHEEL_SIZE)
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now = timer_now_forced();
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memset(wheel, 0, sizeof(wheel));
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next_tick = timer_now() + TIMER_INTERVAL;
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curr = wheel;
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}
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}
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Timer*
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timer_schedule (Timer_Callback timeout, Any_Type arg, Time delay)
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{
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Timer_Queue *spoke;
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Timer *t, *p;
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u_long ticks;
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u_long delta;
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Time behind;
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if (timer_free_list)
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{
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t = timer_free_list;
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timer_free_list = t->q.next;
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}
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else
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{
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t = malloc (sizeof (*t));
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if (!t)
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{
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fprintf (stderr, "%s.timer_schedule: %s\n",
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prog_name, strerror (errno));
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return 0;
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}
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}
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memset (t, 0, sizeof (*t));
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t->func = timeout;
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t->arg = arg;
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behind = (timer_now () - next_tick);
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if (behind > 0.0)
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delay += behind;
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if (delay < 0.0)
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ticks = 1;
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else
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{
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ticks = (delay + TIMER_INTERVAL / 2.0) * (1.0 / TIMER_INTERVAL);
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if (!ticks)
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ticks = 1; /* minimum delay is a tick */
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}
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spoke = curr + (ticks % WHEEL_SIZE);
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if (spoke >= wheel + WHEEL_SIZE)
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spoke -= WHEEL_SIZE;
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delta = ticks / WHEEL_SIZE;
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p = (Timer *) spoke;
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while (p->q.next && delta > p->q.next->delta)
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{
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delta -= p->q.next->delta;
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p = p->q.next;
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}
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t->q.next = p->q.next;
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t->q.prev = p;
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p->q.next = t;
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t->delta = delta;
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if (t->q.next)
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{
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t->q.next->q.prev = t;
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t->q.next->delta -= delta;
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}
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if (DBG > 2)
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fprintf (stderr, "timer_schedule: t=%p, delay=%gs, arg=%lx\n",
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t, delay, arg.l);
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return t;
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}
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void
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timer_cancel (Timer *t)
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timer_tick(void)
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{
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if (DBG > 2)
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fprintf (stderr, "timer_cancel: t=%p\n", t);
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Timer *t, *t_next;
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assert (t->q.prev);
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assert(!t_curr);
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/* A module MUST NOT call timer_cancel() for a timer that is
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currently being processed (whose timeout has expired). */
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if (t_curr == t)
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{
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fprintf (stderr, "timer_cancel() called on currently active timer!\n");
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return;
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}
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now = timer_now_forced();
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if (t->q.next)
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{
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t->q.next->delta += t->delta;
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t->q.next->q.prev = t->q.prev;
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}
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t->q.prev->q.next = t->q.next;
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done (t);
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while (timer_now() >= next_tick) {
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for (t = curr->next; t && t->delta == 0; t = t_next) {
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t_curr = t;
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(*t->func) (t, t->arg);
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t_next = t->q.next;
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done(t);
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}
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t_curr = 0;
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curr->next = t;
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if (t) {
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t->q.prev = (Timer *) curr;
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--t->delta;
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}
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next_tick += TIMER_INTERVAL;
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if (++curr >= wheel + WHEEL_SIZE)
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curr = wheel;
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}
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}
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Timer *
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timer_schedule(Timer_Callback timeout, Any_Type arg, Time delay)
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{
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Timer_Queue *spoke;
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Timer *t, *p;
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u_long ticks;
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u_long delta;
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Time behind;
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if (timer_free_list) {
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t = timer_free_list;
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timer_free_list = t->q.next;
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} else {
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t = malloc(sizeof(*t));
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if (!t) {
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fprintf(stderr, "%s.timer_schedule: %s\n",
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prog_name, strerror(errno));
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return 0;
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}
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}
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memset(t, 0, sizeof(*t));
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t->func = timeout;
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t->arg = arg;
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behind = (timer_now() - next_tick);
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if (behind > 0.0)
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delay += behind;
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if (delay < 0.0)
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ticks = 1;
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else {
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ticks =
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(delay + TIMER_INTERVAL / 2.0) * (1.0 / TIMER_INTERVAL);
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if (!ticks)
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ticks = 1; /* minimum delay is a tick */
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}
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spoke = curr + (ticks % WHEEL_SIZE);
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if (spoke >= wheel + WHEEL_SIZE)
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spoke -= WHEEL_SIZE;
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delta = ticks / WHEEL_SIZE;
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p = (Timer *) spoke;
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while (p->q.next && delta > p->q.next->delta) {
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delta -= p->q.next->delta;
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p = p->q.next;
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}
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t->q.next = p->q.next;
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t->q.prev = p;
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p->q.next = t;
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t->delta = delta;
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if (t->q.next) {
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t->q.next->q.prev = t;
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t->q.next->delta -= delta;
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}
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if (DBG > 2)
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fprintf(stderr, "timer_schedule: t=%p, delay=%gs, arg=%lx\n",
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t, delay, arg.l);
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return t;
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}
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void
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timer_cancel(Timer * t)
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{
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if (DBG > 2)
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fprintf(stderr, "timer_cancel: t=%p\n", t);
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assert(t->q.prev);
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/*
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* A module MUST NOT call timer_cancel() for a timer that is currently
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* being processed (whose timeout has expired).
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*/
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if (t_curr == t) {
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fprintf(stderr,
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"timer_cancel() called on currently active timer!\n");
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return;
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}
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if (t->q.next) {
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t->q.next->delta += t->delta;
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t->q.next->q.prev = t->q.prev;
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}
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t->q.prev->q.next = t->q.next;
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done(t);
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}
|
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|
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