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time_test.c
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time_test.c
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/*
*
* Copyright 2015-2016, 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 time support. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.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"
static void to_fp(void *arg, const char *buf, size_t len) {
fwrite(buf, 1, len, (FILE *)arg);
}
/* Convert gpr_uintmax x to ascii base b (2..16), and write with
(*writer)(arg, ...), zero padding to "chars" digits). */
static void u_to_s(uintmax_t x, unsigned base, int chars,
void (*writer)(void *arg, const char *buf, size_t len),
void *arg) {
char buf[64];
char *p = buf + sizeof(buf);
do {
*--p = "0123456789abcdef"[x % base];
x /= base;
chars--;
} while (x != 0 || chars > 0);
(*writer)(arg, p, (size_t)(buf + sizeof(buf) - p));
}
/* Convert gpr_intmax x to ascii base b (2..16), and write with
(*writer)(arg, ...), zero padding to "chars" digits). */
static void i_to_s(intmax_t x, unsigned base, int chars,
void (*writer)(void *arg, const char *buf, size_t len),
void *arg) {
if (x < 0) {
(*writer)(arg, "-", 1);
u_to_s((uintmax_t)-x, base, chars - 1, writer, arg);
} else {
u_to_s((uintmax_t)x, base, chars, writer, arg);
}
}
/* Convert ts to ascii, and write with (*writer)(arg, ...). */
static void ts_to_s(gpr_timespec t,
void (*writer)(void *arg, const char *buf, size_t len),
void *arg) {
if (t.tv_sec < 0 && t.tv_nsec != 0) {
t.tv_sec++;
t.tv_nsec = GPR_NS_PER_SEC - t.tv_nsec;
}
i_to_s(t.tv_sec, 10, 0, writer, arg);
(*writer)(arg, ".", 1);
i_to_s(t.tv_nsec, 10, 9, writer, arg);
}
static void test_values(void) {
int i;
gpr_timespec x = gpr_time_0(GPR_CLOCK_REALTIME);
GPR_ASSERT(x.tv_sec == 0 && x.tv_nsec == 0);
x = gpr_inf_future(GPR_CLOCK_REALTIME);
fprintf(stderr, "far future ");
i_to_s(x.tv_sec, 16, 16, &to_fp, stderr);
fprintf(stderr, "\n");
GPR_ASSERT(x.tv_sec == INT64_MAX);
fprintf(stderr, "far future ");
ts_to_s(x, &to_fp, stderr);
fprintf(stderr, "\n");
x = gpr_inf_past(GPR_CLOCK_REALTIME);
fprintf(stderr, "far past ");
i_to_s(x.tv_sec, 16, 16, &to_fp, stderr);
fprintf(stderr, "\n");
GPR_ASSERT(x.tv_sec == INT64_MIN);
fprintf(stderr, "far past ");
ts_to_s(x, &to_fp, stderr);
fprintf(stderr, "\n");
for (i = 1; i != 1000 * 1000 * 1000; i *= 10) {
x = gpr_time_from_micros(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec == i / GPR_US_PER_SEC &&
x.tv_nsec == (i % GPR_US_PER_SEC) * GPR_NS_PER_US);
x = gpr_time_from_nanos(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec == i / GPR_NS_PER_SEC &&
x.tv_nsec == (i % GPR_NS_PER_SEC));
x = gpr_time_from_millis(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec == i / GPR_MS_PER_SEC &&
x.tv_nsec == (i % GPR_MS_PER_SEC) * GPR_NS_PER_MS);
}
/* Test possible overflow in conversion of -ve values. */
x = gpr_time_from_micros(-(INT64_MAX - 999997), GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec < 0);
GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
x = gpr_time_from_nanos(-(INT64_MAX - 999999997), GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec < 0);
GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
x = gpr_time_from_millis(-(INT64_MAX - 997), GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec < 0);
GPR_ASSERT(x.tv_nsec >= 0 && x.tv_nsec < GPR_NS_PER_SEC);
/* Test general -ve values. */
for (i = -1; i > -1000 * 1000 * 1000; i *= 7) {
x = gpr_time_from_micros(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec * GPR_US_PER_SEC + x.tv_nsec / GPR_NS_PER_US == i);
x = gpr_time_from_nanos(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec * GPR_NS_PER_SEC + x.tv_nsec == i);
x = gpr_time_from_millis(i, GPR_TIMESPAN);
GPR_ASSERT(x.tv_sec * GPR_MS_PER_SEC + x.tv_nsec / GPR_NS_PER_MS == i);
}
}
static void test_add_sub(void) {
int i;
int j;
int k;
/* Basic addition and subtraction. */
for (i = -100; i <= 100; i++) {
for (j = -100; j <= 100; j++) {
for (k = 1; k <= 10000000; k *= 10) {
int sum = i + j;
int diff = i - j;
gpr_timespec it = gpr_time_from_micros(i * k, GPR_TIMESPAN);
gpr_timespec jt = gpr_time_from_micros(j * k, GPR_TIMESPAN);
gpr_timespec sumt = gpr_time_add(it, jt);
gpr_timespec difft = gpr_time_sub(it, jt);
if (gpr_time_cmp(gpr_time_from_micros(sum * k, GPR_TIMESPAN), sumt) !=
0) {
fprintf(stderr, "i %d j %d sum %d sumt ", i, j, sum);
ts_to_s(sumt, &to_fp, stderr);
fprintf(stderr, "\n");
GPR_ASSERT(0);
}
if (gpr_time_cmp(gpr_time_from_micros(diff * k, GPR_TIMESPAN), difft) !=
0) {
fprintf(stderr, "i %d j %d diff %d diff ", i, j, diff);
ts_to_s(sumt, &to_fp, stderr);
fprintf(stderr, "\n");
GPR_ASSERT(0);
}
}
}
}
}
static void test_overflow(void) {
/* overflow */
gpr_timespec x = gpr_time_from_micros(1, GPR_TIMESPAN);
do {
x = gpr_time_add(x, x);
} while (gpr_time_cmp(x, gpr_inf_future(GPR_TIMESPAN)) < 0);
GPR_ASSERT(gpr_time_cmp(x, gpr_inf_future(GPR_TIMESPAN)) == 0);
x = gpr_time_from_micros(-1, GPR_TIMESPAN);
do {
x = gpr_time_add(x, x);
} while (gpr_time_cmp(x, gpr_inf_past(GPR_TIMESPAN)) > 0);
GPR_ASSERT(gpr_time_cmp(x, gpr_inf_past(GPR_TIMESPAN)) == 0);
}
static void test_sticky_infinities(void) {
int i;
int j;
int k;
gpr_timespec infinity[2];
gpr_timespec addend[3];
infinity[0] = gpr_inf_future(GPR_TIMESPAN);
infinity[1] = gpr_inf_past(GPR_TIMESPAN);
addend[0] = gpr_inf_future(GPR_TIMESPAN);
addend[1] = gpr_inf_past(GPR_TIMESPAN);
addend[2] = gpr_time_0(GPR_TIMESPAN);
/* Infinities are sticky */
for (i = 0; i != sizeof(infinity) / sizeof(infinity[0]); i++) {
for (j = 0; j != sizeof(addend) / sizeof(addend[0]); j++) {
gpr_timespec x = gpr_time_add(infinity[i], addend[j]);
GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
x = gpr_time_sub(infinity[i], addend[j]);
GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
}
for (k = -200; k <= 200; k++) {
gpr_timespec y = gpr_time_from_micros(k * 100000, GPR_TIMESPAN);
gpr_timespec x = gpr_time_add(infinity[i], y);
GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
x = gpr_time_sub(infinity[i], y);
GPR_ASSERT(gpr_time_cmp(x, infinity[i]) == 0);
}
}
}
static void test_similar(void) {
GPR_ASSERT(1 == gpr_time_similar(gpr_inf_future(GPR_TIMESPAN),
gpr_inf_future(GPR_TIMESPAN),
gpr_time_0(GPR_TIMESPAN)));
GPR_ASSERT(1 == gpr_time_similar(gpr_inf_past(GPR_TIMESPAN),
gpr_inf_past(GPR_TIMESPAN),
gpr_time_0(GPR_TIMESPAN)));
GPR_ASSERT(0 == gpr_time_similar(gpr_inf_past(GPR_TIMESPAN),
gpr_inf_future(GPR_TIMESPAN),
gpr_time_0(GPR_TIMESPAN)));
GPR_ASSERT(0 == gpr_time_similar(gpr_inf_future(GPR_TIMESPAN),
gpr_inf_past(GPR_TIMESPAN),
gpr_time_0(GPR_TIMESPAN)));
GPR_ASSERT(1 == gpr_time_similar(gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_0(GPR_TIMESPAN)));
GPR_ASSERT(1 == gpr_time_similar(gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_from_micros(15, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN)));
GPR_ASSERT(1 == gpr_time_similar(gpr_time_from_micros(15, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN)));
GPR_ASSERT(0 == gpr_time_similar(gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_from_micros(25, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN)));
GPR_ASSERT(0 == gpr_time_similar(gpr_time_from_micros(25, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN),
gpr_time_from_micros(10, GPR_TIMESPAN)));
}
int main(int argc, char *argv[]) {
grpc_test_init(argc, argv);
test_values();
test_add_sub();
test_overflow();
test_sticky_infinities();
test_similar();
return 0;
}