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ipc/chromium/src/third_party/libevent/test/regress_et.c@6474c204b198 (annotated)

ipc/chromium/src/third_party/libevent/test/regress_et.c

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0 1 /*
michael@0 2 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson
michael@0 3 *
michael@0 4 * Redistribution and use in source and binary forms, with or without
michael@0 5 * modification, are permitted provided that the following conditions
michael@0 6 * are met:
michael@0 7 * 1. Redistributions of source code must retain the above copyright
michael@0 8 * notice, this list of conditions and the following disclaimer.
michael@0 9 * 2. Redistributions in binary form must reproduce the above copyright
michael@0 10 * notice, this list of conditions and the following disclaimer in the
michael@0 11 * documentation and/or other materials provided with the distribution.
michael@0 12 * 3. The name of the author may not be used to endorse or promote products
michael@0 13 * derived from this software without specific prior written permission.
michael@0 14 *
michael@0 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
michael@0 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
michael@0 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
michael@0 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
michael@0 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
michael@0 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
michael@0 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
michael@0 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
michael@0 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0 25 */
michael@0 26 #include "../util-internal.h"
michael@0 27 #include "event2/event-config.h"
michael@0 28
michael@0 29 #ifdef WIN32
michael@0 30 #include <winsock2.h>
michael@0 31 #endif
michael@0 32 #include <sys/types.h>
michael@0 33 #include <sys/stat.h>
michael@0 34 #ifdef _EVENT_HAVE_SYS_SOCKET_H
michael@0 35 #include <sys/socket.h>
michael@0 36 #endif
michael@0 37 #include <fcntl.h>
michael@0 38 #include <stdlib.h>
michael@0 39 #include <stdio.h>
michael@0 40 #include <string.h>
michael@0 41 #ifndef WIN32
michael@0 42 #include <sys/time.h>
michael@0 43 #include <unistd.h>
michael@0 44 #endif
michael@0 45 #include <errno.h>
michael@0 46
michael@0 47 #include "event2/event.h"
michael@0 48 #include "event2/util.h"
michael@0 49
michael@0 50 #include "regress.h"
michael@0 51
michael@0 52 static int was_et = 0;
michael@0 53
michael@0 54 static void
michael@0 55 read_cb(evutil_socket_t fd, short event, void *arg)
michael@0 56 {
michael@0 57 char buf;
michael@0 58 int len;
michael@0 59
michael@0 60 len = recv(fd, &buf, sizeof(buf), 0);
michael@0 61
michael@0 62 called++;
michael@0 63 if (event & EV_ET)
michael@0 64 was_et = 1;
michael@0 65
michael@0 66 if (!len)
michael@0 67 event_del(arg);
michael@0 68 }
michael@0 69
michael@0 70 #ifndef SHUT_WR
michael@0 71 #define SHUT_WR 1
michael@0 72 #endif
michael@0 73
michael@0 74 #ifdef WIN32
michael@0 75 #define LOCAL_SOCKETPAIR_AF AF_INET
michael@0 76 #else
michael@0 77 #define LOCAL_SOCKETPAIR_AF AF_UNIX
michael@0 78 #endif
michael@0 79
michael@0 80 static void
michael@0 81 test_edgetriggered(void *et)
michael@0 82 {
michael@0 83 struct event *ev = NULL;
michael@0 84 struct event_base *base = NULL;
michael@0 85 const char *test = "test string";
michael@0 86 evutil_socket_t pair[2] = {-1,-1};
michael@0 87 int supports_et;
michael@0 88
michael@0 89 /* On Linux 3.2.1 (at least, as patched by Fedora and tested by Nick),
michael@0 90 * doing a "recv" on an AF_UNIX socket resets the readability of the
michael@0 91 * socket, even though there is no state change, so we don't actually
michael@0 92 * get edge-triggered behavior. Yuck! Linux 3.1.9 didn't have this
michael@0 93 * problem.
michael@0 94 */
michael@0 95 #ifdef __linux__
michael@0 96 if (evutil_ersatz_socketpair(AF_INET, SOCK_STREAM, 0, pair) == -1) {
michael@0 97 tt_abort_perror("socketpair");
michael@0 98 }
michael@0 99 #else
michael@0 100 if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, pair) == -1) {
michael@0 101 tt_abort_perror("socketpair");
michael@0 102 }
michael@0 103 #endif
michael@0 104
michael@0 105 called = was_et = 0;
michael@0 106
michael@0 107 tt_int_op(send(pair[0], test, (int)strlen(test)+1, 0), >, 0);
michael@0 108 shutdown(pair[0], SHUT_WR);
michael@0 109
michael@0 110 /* Initalize the event library */
michael@0 111 base = event_base_new();
michael@0 112
michael@0 113 if (!strcmp(event_base_get_method(base), "epoll") ||
michael@0 114 !strcmp(event_base_get_method(base), "epoll (with changelist)") ||
michael@0 115 !strcmp(event_base_get_method(base), "kqueue"))
michael@0 116 supports_et = 1;
michael@0 117 else
michael@0 118 supports_et = 0;
michael@0 119
michael@0 120 TT_BLATHER(("Checking for edge-triggered events with %s, which should %s"
michael@0 121 "support edge-triggering", event_base_get_method(base),
michael@0 122 supports_et?"":"not "));
michael@0 123
michael@0 124 /* Initalize one event */
michael@0 125 ev = event_new(base, pair[1], EV_READ|EV_ET|EV_PERSIST, read_cb, &ev);
michael@0 126
michael@0 127 event_add(ev, NULL);
michael@0 128
michael@0 129 /* We're going to call the dispatch function twice. The first invocation
michael@0 130 * will read a single byte from pair[1] in either case. If we're edge
michael@0 131 * triggered, we'll only see the event once (since we only see transitions
michael@0 132 * from no data to data), so the second invocation of event_base_loop will
michael@0 133 * do nothing. If we're level triggered, the second invocation of
michael@0 134 * event_base_loop will also activate the event (because there's still
michael@0 135 * data to read). */
michael@0 136 event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);
michael@0 137 event_base_loop(base,EVLOOP_NONBLOCK|EVLOOP_ONCE);
michael@0 138
michael@0 139 if (supports_et) {
michael@0 140 tt_int_op(called, ==, 1);
michael@0 141 tt_assert(was_et);
michael@0 142 } else {
michael@0 143 tt_int_op(called, ==, 2);
michael@0 144 tt_assert(!was_et);
michael@0 145 }
michael@0 146
michael@0 147 end:
michael@0 148 if (ev) {
michael@0 149 event_del(ev);
michael@0 150 event_free(ev);
michael@0 151 }
michael@0 152 if (base)
michael@0 153 event_base_free(base);
michael@0 154 evutil_closesocket(pair[0]);
michael@0 155 evutil_closesocket(pair[1]);
michael@0 156 }
michael@0 157
michael@0 158 static void
michael@0 159 test_edgetriggered_mix_error(void *data_)
michael@0 160 {
michael@0 161 struct basic_test_data *data = data_;
michael@0 162 struct event_base *base = NULL;
michael@0 163 struct event *ev_et=NULL, *ev_lt=NULL;
michael@0 164
michael@0 165 #ifdef _EVENT_DISABLE_DEBUG_MODE
michael@0 166 if (1)
michael@0 167 tt_skip();
michael@0 168 #endif
michael@0 169
michael@0 170 event_enable_debug_mode();
michael@0 171
michael@0 172 base = event_base_new();
michael@0 173
michael@0 174 /* try mixing edge-triggered and level-triggered to make sure it fails*/
michael@0 175 ev_et = event_new(base, data->pair[0], EV_READ|EV_ET, read_cb, ev_et);
michael@0 176 tt_assert(ev_et);
michael@0 177 ev_lt = event_new(base, data->pair[0], EV_READ, read_cb, ev_lt);
michael@0 178 tt_assert(ev_lt);
michael@0 179
michael@0 180 /* Add edge-triggered, then level-triggered. Get an error. */
michael@0 181 tt_int_op(0, ==, event_add(ev_et, NULL));
michael@0 182 tt_int_op(-1, ==, event_add(ev_lt, NULL));
michael@0 183 tt_int_op(EV_READ, ==, event_pending(ev_et, EV_READ, NULL));
michael@0 184 tt_int_op(0, ==, event_pending(ev_lt, EV_READ, NULL));
michael@0 185
michael@0 186 tt_int_op(0, ==, event_del(ev_et));
michael@0 187 /* Add level-triggered, then edge-triggered. Get an error. */
michael@0 188 tt_int_op(0, ==, event_add(ev_lt, NULL));
michael@0 189 tt_int_op(-1, ==, event_add(ev_et, NULL));
michael@0 190 tt_int_op(EV_READ, ==, event_pending(ev_lt, EV_READ, NULL));
michael@0 191 tt_int_op(0, ==, event_pending(ev_et, EV_READ, NULL));
michael@0 192
michael@0 193 end:
michael@0 194 if (ev_et)
michael@0 195 event_free(ev_et);
michael@0 196 if (ev_lt)
michael@0 197 event_free(ev_lt);
michael@0 198 if (base)
michael@0 199 event_base_free(base);
michael@0 200 }
michael@0 201
michael@0 202 struct testcase_t edgetriggered_testcases[] = {
michael@0 203 { "et", test_edgetriggered, TT_FORK, NULL, NULL },
michael@0 204 { "et_mix_error", test_edgetriggered_mix_error,
michael@0 205 TT_FORK|TT_NEED_SOCKETPAIR|TT_NO_LOGS, &basic_setup, NULL },
michael@0 206 END_OF_TESTCASES
michael@0 207 };

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