49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// Copyright 2010-2025 Google LLC
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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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#include "ortools/util/sigint.h"
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#include <csignal>
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#include <cstdlib>
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#include <functional>
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#include "ortools/base/logging.h"
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namespace operations_research {
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void SigintHandler::Register(const std::function<void()>& f) {
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handler_ = [this, f]() -> void {
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++num_sigint_calls_;
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if (num_sigint_calls_ >= 3) {
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LOG(INFO) << "^C pressed " << num_sigint_calls_
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<< " times. Forcing termination.";
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exit(EXIT_FAILURE);
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}
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LOG(INFO) << "^C pressed " << num_sigint_calls_ << " times. "
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<< "Interrupting the solver. Press 3 times to force termination.";
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if (num_sigint_calls_ == 1) f();
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};
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signal(SIGINT, &ControlCHandler);
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}
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// This method will be called by the system after the SIGINT signal.
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// The parameter is the signal received.
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void SigintHandler::ControlCHandler(int sig) { handler_(); }
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// Unregister the SIGINT handler.
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SigintHandler::~SigintHandler() { signal(SIGINT, SIG_DFL); }
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thread_local std::function<void()> SigintHandler::handler_;
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} // namespace operations_research
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