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/** |
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* Copyright (C) 2017 Fábio Bento (random-guy) |
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* |
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* This library is distributed under the MIT License. See notice at the end |
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* of this file. |
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* |
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*/ |
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|
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#ifndef CONDITIONALSEMAPHORE_H |
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#define CONDITIONALSEMAPHORE_H |
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|
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#include <atomic> |
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#include <stdexcept> |
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|
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/*** |
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* Conditional Semaphore - Thread safe conditional semaphore. You can set the variable by using SetCondition(), |
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* and unset it by using UnsetCondition() (you can set and unset multiple times). You can get the internal boolean variable state |
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* by using ConditionIsSet(). |
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* ConditionIsSet() return true when there were more calls to SetCondition() than to UnsetCondition() and |
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* false if there the calls to SetCondition() and UnsetCondition() were equal. |
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* |
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* UnsetCondition() throws an exception if it is called more than SetCondition(). |
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* */ |
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|
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namespace Cosemaphore{ |
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|
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class ConditionalSemaphore |
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{ |
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public: |
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ConditionalSemaphore(); |
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void SetCondition(); |
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void UnsetCondition(); |
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bool ConditionIsSet(); |
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private: |
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std::atomic<long long> internalCounter; |
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}; |
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|
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} |
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|
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#endif // CONDITIONALSEMAPHORE_H |
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|
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/** |
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* Copyright (c) 2017 |
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* |
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* Permission is hereby granted, free of charge, to any person |
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* obtaining a copy of this software and associated documentation |
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* files (the "Software"), to deal in the Software without |
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* restriction, including without limitation the rights to use, |
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* copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following |
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* conditions: |
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* |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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* OTHER DEALINGS IN THE SOFTWARE. |
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*/ |