lib/tevent/testsuite.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    testing of the events subsystem
   5
   6    Copyright (C) Stefan Metzmacher 2006-2009
   7
   8      ** NOTE! The following LGPL license applies to the tevent
   9      ** library. This does NOT imply that all of Samba is released
  10      ** under the LGPL
  11
  12    This library is free software; you can redistribute it and/or
  13    modify it under the terms of the GNU Lesser General Public
  14    License as published by the Free Software Foundation; either
  15    version 3 of the License, or (at your option) any later version.
  16
  17    This library is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    Lesser General Public License for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "lib/events/events.h"
  28 #include "system/filesys.h"
  29 #include "torture/torture.h"
  30
  31 static int fde_count;
  32
  33 static void fde_handler(struct tevent_context *ev_ctx, struct tevent_fd *f,
  34                         uint16_t flags, void *private_data)
  35 {
  36         int *fd = (int *)private_data;
  37         char c;
  38 #ifdef SA_SIGINFO
  39         kill(getpid(), SIGUSR1);
  40 #endif
  41         kill(getpid(), SIGALRM);
  42         read(fd[0], &c, 1);
  43         write(fd[1], &c, 1);
  44         fde_count++;
  45 }
  46
  47 static void finished_handler(struct tevent_context *ev_ctx, struct tevent_timer *te,
  48                              struct timeval tval, void *private_data)
  49 {
  50         int *finished = (int *)private_data;
  51         (*finished) = 1;
  52 }
  53
  54 static void count_handler(struct tevent_context *ev_ctx, struct tevent_signal *te,
  55                           int signum, int count, void *info, void *private_data)
  56 {
  57         int *countp = (int *)private_data;
  58         (*countp) += count;
  59 }
  60
  61 static bool test_event_context(struct torture_context *test,
  62                                const void *test_data)
  63 {
  64         struct tevent_context *ev_ctx;
  65         int fd[2] = { -1, -1 };
  66         const char *backend = (const char *)test_data;
  67         int alarm_count=0, info_count=0;
  68         struct tevent_fd *fde;
  69 #ifdef SA_RESTART
  70         struct tevent_signal *se1 = NULL;
  71 #endif
  72         struct tevent_signal *se2 = NULL;
  73 #ifdef SA_SIGINFO
  74         struct tevent_signal *se3 = NULL;
  75 #endif
  76         int finished=0;
  77         struct timeval t;
  78         char c = 0;
  79
  80         ev_ctx = tevent_context_init_byname(test, backend);
  81         if (ev_ctx == NULL) {
  82                 torture_comment(test, "event backend '%s' not supported\n", backend);
  83                 return true;
  84         }
  85
  86         torture_comment(test, "Testing event backend '%s'\n", backend);
  87
  88         /* reset globals */
  89         fde_count = 0;
  90
  91         /* create a pipe */
  92         pipe(fd);
  93
  94         fde = tevent_add_fd(ev_ctx, ev_ctx, fd[0], TEVENT_FD_READ,
  95                             fde_handler, fd);
  96         tevent_fd_set_auto_close(fde);
  97
  98         tevent_add_timer(ev_ctx, ev_ctx, timeval_current_ofs(2,0),
  99                          finished_handler, &finished);
 100
 101 #ifdef SA_RESTART
 102         se1 = tevent_add_signal(ev_ctx, ev_ctx, SIGALRM, SA_RESTART, count_handler, &alarm_count);
 103 #endif
 104 #ifdef SA_RESETHAND
 105         se2 = tevent_add_signal(ev_ctx, ev_ctx, SIGALRM, SA_RESETHAND, count_handler, &alarm_count);
 106 #endif
 107 #ifdef SA_SIGINFO
 108         se3 = tevent_add_signal(ev_ctx, ev_ctx, SIGUSR1, SA_SIGINFO, count_handler, &info_count);
 109 #endif
 110
 111         write(fd[1], &c, 1);
 112
 113         t = timeval_current();
 114         while (!finished) {
 115                 errno = 0;
 116                 if (tevent_loop_once(ev_ctx) == -1) {
 117                         talloc_free(ev_ctx);
 118                         torture_fail(test, talloc_asprintf(test, "Failed event loop %s\n", strerror(errno)));
 119                 }
 120         }
 121
 122         talloc_free(fde);
 123         close(fd[1]);
 124
 125         while (alarm_count < fde_count+1) {
 126                 if (tevent_loop_once(ev_ctx) == -1) {
 127                         break;
 128                 }
 129         }
 130
 131         torture_comment(test, "Got %.2f pipe events/sec\n", fde_count/timeval_elapsed(&t));
 132
 133 #ifdef SA_RESTART
 134         talloc_free(se1);
 135 #endif
 136
 137         torture_assert_int_equal(test, alarm_count, 1+fde_count, "alarm count mismatch");
 138
 139 #ifdef SA_SIGINFO
 140         talloc_free(se3);
 141         torture_assert_int_equal(test, info_count, fde_count, "info count mismatch");
 142 #endif
 143
 144         talloc_free(ev_ctx);
 145
 146         return true;
 147 }
 148
 149 struct torture_suite *torture_local_event(TALLOC_CTX *mem_ctx)
 150 {
 151         struct torture_suite *suite = torture_suite_create(mem_ctx, "event");
 152         const char **list = tevent_backend_list(suite);
 153         int i;
 154
 155         for (i=0;list && list[i];i++) {
 156                 torture_suite_add_simple_tcase_const(suite, list[i],
 157                                                test_event_context,
 158                                                (const void *)list[i]);
 159         }
 160
 161         return suite;
 162 }