47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
/*
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This file is a part of the JThread package, which contains some object-
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oriented thread wrappers for different thread implementations.
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Copyright (c) 2000-2006 Jori Liesenborgs (jori.liesenborgs@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell 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 conditions:
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The above copyright notice and this permission notice shall be included in
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all 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
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THE 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
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <condition_variable>
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/** A syncronization primitive that will wake up one waiting thread when signaled.
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* Calling @c signal() multiple times before a waiting thread has had a chance
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* to notice the signal will wake only one thread. Additionally, if no threads
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* are waiting on the event when it is signaled, the next call to @c wait()
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* will return (almost) immediately.
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*/
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class Event
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{
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public:
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void wait();
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void signal();
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private:
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std::condition_variable cv;
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std::mutex mutex;
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bool notified = false;
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};
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