CommonLibs/ConditionalSemaphore/conditionalsemaphore.h

/**
 * Copyright (C) 2017 - 2018 Fábio Bento (fabiobento512)
 *
 * This library is distributed under the MIT License. See notice at the end
 * of this file.
 *
 */

#ifndef CONDITIONALSEMAPHORE_H
#define CONDITIONALSEMAPHORE_H

#include <atomic>
#include <stdexcept>

/***
 * Conditional Semaphore - Thread safe conditional semaphore. You can set the variable by using SetCondition(),
 * and unset it by using UnsetCondition() (you can set and unset multiple times). You can get the internal boolean variable state
 * by using ConditionIsSet().
 * ConditionIsSet() return true when there were more calls to SetCondition() than to UnsetCondition() and
 * false if there the calls to SetCondition() and UnsetCondition() were equal.
 *
 * UnsetCondition() throws an exception if it is called more than SetCondition().
 * */

 namespace Cosemaphore{
 
class ConditionalSemaphore
{
public:
    ConditionalSemaphore();
        void SetCondition();
        void UnsetCondition();
    bool ConditionIsSet();
private:
    std::atomic<long long> internalCounter;
};

}

#endif // CONDITIONALSEMAPHORE_H

/**
 * Copyright (C) 2017 - 2018 Fábio Bento (fabiobento512)
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
Revision:	1110
Committed:	Sat Feb 16 17:24:18 2019 UTC (6 years, 8 months ago) by s10k
Content type:	text/x-chdr
File size:	2296 byte(s)
Log Message:	slightly modifications to allow subclassing, added Q_OBJECT macro, since usually all classes derived from QObject should use it
#	Content
1	/**
2	* Copyright (C) 2017 - 2018 Fábio Bento (fabiobento512)
3	*
4	* This library is distributed under the MIT License. See notice at the end
5	* of this file.
6	*
7	*/
8
9	#ifndef CONDITIONALSEMAPHORE_H
10	#define CONDITIONALSEMAPHORE_H
11
12	#include <atomic>
13	#include <stdexcept>
14
15	/***
16	* Conditional Semaphore - Thread safe conditional semaphore. You can set the variable by using SetCondition(),
17	* and unset it by using UnsetCondition() (you can set and unset multiple times). You can get the internal boolean variable state
18	* by using ConditionIsSet().
19	* ConditionIsSet() return true when there were more calls to SetCondition() than to UnsetCondition() and
20	* false if there the calls to SetCondition() and UnsetCondition() were equal.
21	*
22	* UnsetCondition() throws an exception if it is called more than SetCondition().
23	* */
24
25	namespace Cosemaphore{
26
27	class ConditionalSemaphore
28	{
29	public:
30	ConditionalSemaphore();
31	void SetCondition();
32	void UnsetCondition();
33	bool ConditionIsSet();
34	private:
35	std::atomic<long long> internalCounter;
36	};
37
38	}
39
40	#endif // CONDITIONALSEMAPHORE_H
41
42	/**
43	* Copyright (C) 2017 - 2018 Fábio Bento (fabiobento512)
44	*
45	* Permission is hereby granted, free of charge, to any person
46	* obtaining a copy of this software and associated documentation
47	* files (the "Software"), to deal in the Software without
48	* restriction, including without limitation the rights to use,
49	* copy, modify, merge, publish, distribute, sublicense, and/or sell
50	* copies of the Software, and to permit persons to whom the
51	* Software is furnished to do so, subject to the following
52	* conditions:
53	*
54	* The above copyright notice and this permission notice shall be
55	* included in all copies or substantial portions of the Software.
56	*
57	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
58	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
59	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
60	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
61	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
62	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
63	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
64	* OTHER DEALINGS IN THE SOFTWARE.
65	*/