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9fc3f9b382
While I don't see -Werror being used on tests anytime soon, there's no reason to keep the warnings in tests unfixed. Signed-off-by: David Lamparter <equinox@opensourcerouting.org> (cherry picked from commit c313895dec3c176584d99f7b8684ddc3f9141d88)
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
/*
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* $Id: heavy-thread.c,v 1.2 2005/04/25 16:42:24 paul Exp $
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*
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* This file is part of Quagga.
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*
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* Quagga 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
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* Quagga is distributed in the hope that it will be useful, but
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* 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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*
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* You should have received a copy of the GNU General Public License
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* along with Quagga; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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/* This programme shows the effects of 'heavy' long-running functions
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* on the cooperative threading model, as demonstrated by heavy.c, and how
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* they can be mitigated using a background thread.
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*
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* Run it with a config file containing 'password whatever', telnet to it
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* (it defaults to port 4000) and enter the 'clear foo string' command.
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* then type whatever and observe that, unlike heavy.c, the vty interface
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* remains responsive.
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*/
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#include <zebra.h>
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#include <math.h>
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#include "thread.h"
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#include "vty.h"
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#include "command.h"
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#include "memory.h"
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#include "log.h"
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#include "tests.h"
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extern struct thread_master *master;
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enum
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{
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ITERS_FIRST = 0,
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ITERS_ERR = 100,
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ITERS_LATER = 400,
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ITERS_PRINT = 10,
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ITERS_MAX = 1000,
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};
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struct work_state {
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struct vty *vty;
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char *str;
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int i;
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};
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static void
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slow_func (struct vty *vty, const char *str, const int i)
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{
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double x = 1;
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int j;
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for (j = 0; j < 300; j++)
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x += sin(x)*j;
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if ((i % ITERS_LATER) == 0)
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printf ("%s: %d, temporary error, save this somehow and do it later..\n",
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__func__, i);
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if ((i % ITERS_ERR) == 0)
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printf ("%s: hard error\n", __func__);
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if ((i % ITERS_PRINT) == 0)
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printf ("%s did %d, x = %g\n", str, i, x);
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}
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static int
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clear_something (struct thread *thread)
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{
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struct work_state *ws = THREAD_ARG(thread);
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/* this could be like iterating through 150k of route_table
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* or worse, iterating through a list of peers, to bgp_stop them with
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* each having 150k route tables to process...
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*/
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while (ws->i < ITERS_MAX)
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{
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slow_func(ws->vty, ws->str, ws->i);
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ws->i++;
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if (thread_should_yield(thread))
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{
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thread_add_background(master, clear_something, ws, 0);
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return 0;
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}
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}
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/* All done! */
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XFREE (MTYPE_TMP, ws->str);
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XFREE (MTYPE_TMP, ws);
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return 0;
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}
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DEFUN (clear_foo,
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clear_foo_cmd,
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"clear foo .LINE",
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"clear command\n"
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"arbitrary string\n")
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{
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char *str;
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struct work_state *ws;
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if (!argc)
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{
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vty_out (vty, "%% string argument required%s", VTY_NEWLINE);
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return CMD_WARNING;
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}
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str = argv_concat (argv, argc, 0);
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if ((ws = XMALLOC(MTYPE_TMP, sizeof(*ws))) == NULL)
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{
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zlog_err ("%s: unable to allocate work_state", __func__);
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return CMD_WARNING;
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}
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if (!(ws->str = XSTRDUP (MTYPE_TMP, str)))
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{
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zlog_err ("%s: unable to xstrdup", __func__);
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XFREE (MTYPE_TMP, ws);
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return CMD_WARNING;
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}
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ws->vty = vty;
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ws->i = ITERS_FIRST;
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thread_add_background(master, clear_something, ws, 0);
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return CMD_SUCCESS;
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}
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void
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test_init()
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{
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install_element (VIEW_NODE, &clear_foo_cmd);
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}
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