Robin E.R. Davies
76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*
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* Copyright (c) Robin E.R. Davies
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* All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#pragma once
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#include <mutex>
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#include <atomic>
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#include <filesystem>
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namespace pipedal
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{
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/**
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* @brief Crash protection.
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*
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* Detect the situation where PiPedal has crashed multiple times due to SIG_SEGVS caused by a plugin.
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*
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* The basic premise: mark segments of code as "crash protected". If Pipedal shuts down without exiting the
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* crash guard zone for some fixed number of occasions (3?), then set a flag that will prevent
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* loading of the default plugin when PiPedal next loads. Since PiPedal restarts indefinitely while
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* running as a service, this allows users to recover after they have committed a plugin that crashes
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* into their current preset.
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*
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*/
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class CrashGuard
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{
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public:
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static void SetCrashGuardFileName(const std::filesystem::path &path);
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static bool HasCrashed();
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static void ClearCrashFlag();
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static void EnterCrashGuardZone();
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static void LeaveCrashGuardZone();
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private:
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static int crashCount;
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static std::mutex mutex;
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static std::filesystem::path fileName;
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static int64_t depth;
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};
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class CrashGuardLock {
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public:
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CrashGuardLock() {
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CrashGuard::EnterCrashGuardZone();
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}
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~CrashGuardLock() {
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CrashGuard::LeaveCrashGuardZone();
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}
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CrashGuardLock(const CrashGuardLock &) = delete;
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CrashGuardLock &operator=(const CrashGuardLock &) = delete;
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CrashGuardLock(CrashGuardLock &&) = delete;
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CrashGuardLock &operator=(CrashGuardLock &&) = delete;
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};
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}; |