68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
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/*
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Copyright (c) 2005-2021 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "common/test.h"
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#include "common/utils.h"
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#include "common/utils_concurrency_limit.h"
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#include "common/spin_barrier.h"
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#include <tbb/tick_count.h>
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#include <thread>
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//! \file test_tick_count.cpp
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//! \brief Test for [timing] specification
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//! Testing clock type of tbb::tick_count
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//! Clock in tbb::tick_count should be steady
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//! \brief \ref requirement
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TEST_CASE("Clock in tbb::tick_count should be steady") {
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CHECK_EQ(tbb::tick_count::clock_type::is_steady, true);
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}
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#if TBB_USE_EXCEPTIONS
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//! Subtraction of equal tick_counts should not throw
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//! \brief \ref error_guessing
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TEST_CASE("Subtraction of equal tick_counts should not throw") {
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tbb::tick_count tick_f = tbb::tick_count::now();
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tbb::tick_count tick_s(tick_f);
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CHECK_NOTHROW(tick_f - tick_s);
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}
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#endif
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//! Test that two tick_count values recorded on different threads can be meaningfully subtracted.
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//! \brief \ref error_guessing
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TEST_CASE("Test for subtracting calls to tick_count from different threads") {
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auto num_of_threads = utils::get_platform_max_threads();
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utils::SpinBarrier thread_barrier(num_of_threads);
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tbb::tick_count start_time;
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auto diff_func = [&thread_barrier, &start_time] (std::size_t ) {
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thread_barrier.wait([&start_time] { start_time = tbb::tick_count::now(); });
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tbb::tick_count end_time(tbb::tick_count::now());
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while ((end_time - start_time).seconds() == 0) {
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end_time = tbb::tick_count::now();
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}
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CHECK_GT((end_time - start_time).seconds(), 0);
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};
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for (std::size_t i = 0; i < 10; ++i) {
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utils::NativeParallelFor(num_of_threads, diff_func);
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}
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}
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