source: trunk/server/lib/tevent/testsuite.c

/* 
   Unix SMB/CIFS implementation.

   testing of the events subsystem

   Copyright (C) Stefan Metzmacher 2006-2009

     ** NOTE! The following LGPL license applies to the tevent
     ** library. This does NOT imply that all of Samba is released
     ** under the LGPL

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "lib/events/events.h"
#include "system/filesys.h"
#include "torture/torture.h"

static int fde_count;

static void fde_handler(struct tevent_context *ev_ctx, struct tevent_fd *f, 
                        uint16_t flags, void *private_data)
{
        int *fd = (int *)private_data;
        char c;
#ifdef SA_SIGINFO
        kill(getpid(), SIGUSR1);
#endif
        kill(getpid(), SIGALRM);
        read(fd[0], &c, 1);
        write(fd[1], &c, 1);
        fde_count++;
}

static void finished_handler(struct tevent_context *ev_ctx, struct tevent_timer *te,
                             struct timeval tval, void *private_data)
{
        int *finished = (int *)private_data;
        (*finished) = 1;
}

static void count_handler(struct tevent_context *ev_ctx, struct signal_event *te,
                          int signum, int count, void *info, void *private_data)
{
        int *countp = (int *)private_data;
        (*countp) += count;
}

static bool test_event_context(struct torture_context *test,
                               const void *test_data)
{
        struct tevent_context *ev_ctx;
        int fd[2] = { -1, -1 };
        const char *backend = (const char *)test_data;
        int alarm_count=0, info_count=0;
        struct tevent_fd *fde;
#ifdef SA_RESTART
        struct tevent_signal *se1 = NULL;
#endif
        struct tevent_signal *se2 = NULL;
#ifdef SA_SIGINFO
        struct tevent_signal *se3 = NULL;
#endif
        int finished=0;
        struct timeval t;
        char c = 0;

        ev_ctx = event_context_init_byname(test, backend);
        if (ev_ctx == NULL) {
                torture_comment(test, "event backend '%s' not supported\n", backend);
                return true;
        }

        torture_comment(test, "Testing event backend '%s'\n", backend);

        /* reset globals */
        fde_count = 0;

        /* create a pipe */
        pipe(fd);

        fde = event_add_fd(ev_ctx, ev_ctx, fd[0], EVENT_FD_READ,
                           fde_handler, fd);
        tevent_fd_set_auto_close(fde);

        event_add_timed(ev_ctx, ev_ctx, timeval_current_ofs(2,0), 
                        finished_handler, &finished);

#ifdef SA_RESTART
        se1 = event_add_signal(ev_ctx, ev_ctx, SIGALRM, SA_RESTART, count_handler, &alarm_count);
#endif
#ifdef SA_RESETHAND
        se2 = event_add_signal(ev_ctx, ev_ctx, SIGALRM, SA_RESETHAND, count_handler, &alarm_count);
#endif
#ifdef SA_SIGINFO
        se3 = event_add_signal(ev_ctx, ev_ctx, SIGUSR1, SA_SIGINFO, count_handler, &info_count);
#endif

        write(fd[1], &c, 1);

        t = timeval_current();
        while (!finished) {
                errno = 0;
                if (event_loop_once(ev_ctx) == -1) {
                        talloc_free(ev_ctx);
                        torture_fail(test, talloc_asprintf(test, "Failed event loop %s\n", strerror(errno)));
                }
        }

        talloc_free(fde);
        close(fd[1]);

        while (alarm_count < fde_count+1) {
                if (event_loop_once(ev_ctx) == -1) {
                        break;
                }
        }

        torture_comment(test, "Got %.2f pipe events/sec\n", fde_count/timeval_elapsed(&t));

#ifdef SA_RESTART
        talloc_free(se1);
#endif

        torture_assert_int_equal(test, alarm_count, 1+fde_count, "alarm count mismatch");

#ifdef SA_SIGINFO
        talloc_free(se3);
        torture_assert_int_equal(test, info_count, fde_count, "info count mismatch");
#endif

        talloc_free(ev_ctx);

        return true;
}

struct torture_suite *torture_local_event(TALLOC_CTX *mem_ctx)
{
        struct torture_suite *suite = torture_suite_create(mem_ctx, "event");
        const char **list = event_backend_list(suite);
        int i;

        for (i=0;list && list[i];i++) {
                torture_suite_add_simple_tcase_const(suite, list[i],
                                               test_event_context,
                                               (const void *)list[i]);
        }

        return suite;
}