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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/* Test of gpr_cancellable. */
#include <stdio.h>
#include <stdlib.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include <grpc/support/thd.h>
#include <grpc/support/time.h>
#include "test/core/util/test_config.h"
struct test {
gpr_mu mu;
gpr_cv cv;
gpr_event ev;
gpr_event done;
gpr_cancellable cancel;
int n;
};
/* A thread body. Wait until t->cancel is cancelledm then
decrement t->n. If t->n becomes 0, set t->done. */
static void thd_body(void *v) {
struct test *t = v;
gpr_mu_lock(&t->mu);
while (!gpr_cv_cancellable_wait(&t->cv, &t->mu, gpr_inf_future, &t->cancel)) {
}
t->n--;
if (t->n == 0) {
gpr_event_set(&t->done, (void *)1);
}
gpr_mu_unlock(&t->mu);
}
static void test(void) {
int i;
gpr_thd_id thd;
struct test t;
int n = 1;
gpr_timespec interval;
gpr_mu_init(&t.mu);
gpr_cv_init(&t.cv);
gpr_event_init(&t.ev);
gpr_event_init(&t.done);
gpr_cancellable_init(&t.cancel);
/* A gpr_cancellable starts not cancelled. */
GPR_ASSERT(!gpr_cancellable_is_cancelled(&t.cancel));
/* Test timeout on event wait for uncancelled gpr_cancellable */
interval = gpr_now();
gpr_event_cancellable_wait(
&t.ev, gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)), &t.cancel);
interval = gpr_time_sub(gpr_now(), interval);
GPR_ASSERT(gpr_time_cmp(interval, gpr_time_from_micros(500000)) >= 0);
GPR_ASSERT(gpr_time_cmp(gpr_time_from_micros(2000000), interval) >= 0);
/* Test timeout on cv wait for uncancelled gpr_cancellable */
gpr_mu_lock(&t.mu);
interval = gpr_now();
while (!gpr_cv_cancellable_wait(
&t.cv, &t.mu,
gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)),
&t.cancel)) {
}
interval = gpr_time_sub(gpr_now(), interval);
GPR_ASSERT(gpr_time_cmp(interval, gpr_time_from_micros(500000)) >= 0);
GPR_ASSERT(gpr_time_cmp(gpr_time_from_micros(2000000), interval) >= 0);
gpr_mu_unlock(&t.mu);
/* Create some threads. They all wait until cancelled; the last to finish
sets t.done. */
t.n = n;
for (i = 0; i != n; i++) {
GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, NULL));
}
/* Check that t.cancel still is not cancelled. */
GPR_ASSERT(!gpr_cancellable_is_cancelled(&t.cancel));
/* Wait a second, and check that no threads have finished waiting. */
gpr_mu_lock(&t.mu);
gpr_cv_wait(&t.cv, &t.mu,
gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)));
GPR_ASSERT(t.n == n);
gpr_mu_unlock(&t.mu);
/* Check that t.cancel still is not cancelled, but when
cancelled it retports that it is cacncelled. */
GPR_ASSERT(!gpr_cancellable_is_cancelled(&t.cancel));
gpr_cancellable_cancel(&t.cancel);
GPR_ASSERT(gpr_cancellable_is_cancelled(&t.cancel));
/* Wait for threads to finish. */
gpr_event_wait(&t.done, gpr_inf_future);
GPR_ASSERT(t.n == 0);
/* Test timeout on cv wait for cancelled gpr_cancellable */
gpr_mu_lock(&t.mu);
interval = gpr_now();
while (!gpr_cv_cancellable_wait(
&t.cv, &t.mu,
gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)),
&t.cancel)) {
}
interval = gpr_time_sub(gpr_now(), interval);
GPR_ASSERT(gpr_time_cmp(gpr_time_from_micros(100000), interval) >= 0);
gpr_mu_unlock(&t.mu);
/* Test timeout on event wait for cancelled gpr_cancellable */
interval = gpr_now();
gpr_event_cancellable_wait(
&t.ev, gpr_time_add(gpr_now(), gpr_time_from_micros(1000000)), &t.cancel);
interval = gpr_time_sub(gpr_now(), interval);
GPR_ASSERT(gpr_time_cmp(gpr_time_from_micros(100000), interval) >= 0);
gpr_mu_destroy(&t.mu);
gpr_cv_destroy(&t.cv);
gpr_cancellable_destroy(&t.cancel);
}
/* ------------------------------------------------- */
int main(int argc, char *argv[]) {
grpc_test_init(argc, argv);
test();
return 0;
}
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