83eed0a886
Changes include: * CPU check has been broken up into a number of small libraries * BoringSSL option has been removed * Better abseil integration
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
// Copyright 2020 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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#ifndef THIRD_PARTY_CPU_CHECK_STOPPER_H_
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#define THIRD_PARTY_CPU_CHECK_STOPPER_H_
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#include <unistd.h>
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#include <atomic>
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#include <cmath>
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#include "utils.h"
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class Stopper {
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public:
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// Infinite timeout if 'timeout' <= 0.
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Stopper(int timeout)
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: t_stop_(timeout <= 0 ? std::numeric_limits<double>::infinity()
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: TimeInSeconds() + timeout) {}
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// Returns true if time has expired or Stop has been invoked.
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// Thread safe.
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bool Expired() const { return stopped_ || TimeInSeconds() > t_stop_; }
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// Sleeps for the minimum of 't' and remaining run time.
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// Thread safe.
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void BoundedSleep(int t) const {
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if (std::isinf(t_stop_)) {
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sleep(t);
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} else {
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const double remaining = t_stop_ - TimeInSeconds();
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if (!stopped_ && remaining > 0) {
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sleep(std::min<int>(t, ceil(remaining)));
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}
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}
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}
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// Causes timeout to expire now.
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// Thread safe.
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void Stop() { stopped_ = true; }
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private:
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const double t_stop_;
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std::atomic_bool stopped_ = false;
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};
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#endif // THIRD_PARTY_CPU_CHECK_STOPPER_H_
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