Brendan LE GLAUNEC
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
// Copyright 2016 Etix Labs
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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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#pragma once
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#include <assert.h> // assert
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#include <csignal> // sigint
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#include <iostream> // stc::cout
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// To avoid an unused warning for the asserted in handle_signal
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#define _unused(x) ((void)(x))
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namespace etix {
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namespace cameradar {
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enum class stop_priority { running, stop, force_stop };
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class event_handler {
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public:
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event_handler(void) : ss(stop_priority::running) {}
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virtual int
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handle_signal(int signum) {
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assert(signum == SIGINT);
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_unused(signum);
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std::cout << "\b\b\b\033[K";
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if (this->ss == stop_priority::running)
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this->ss = stop_priority::stop;
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else
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this->ss = stop_priority::force_stop;
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return 0;
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}
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etix::cameradar::stop_priority
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should_stop(void) const {
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return this->ss;
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}
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private:
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stop_priority ss;
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};
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class signal_handler {
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private:
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signal_handler(void);
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signal_handler(const signal_handler&);
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signal_handler& operator=(const signal_handler&);
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static void call_handler(int signum);
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static event_handler handler;
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public:
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static signal_handler& instance(void);
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etix::cameradar::stop_priority should_stop(void) const;
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};
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}
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}
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