48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2018 Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include "../win32/handle.hpp"
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#include <atomic>
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namespace cruft::thread {
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/// Explicitly does not conform to BasicLockable.
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class semaphore {
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public:
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using value_type = LONG;
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semaphore (value_type initial);
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semaphore ();
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semaphore (const semaphore&) = delete;
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semaphore& operator= (const semaphore&) = delete;
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semaphore (semaphore&&) = delete;
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semaphore& operator= (semaphore&&) = delete;
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value_type acquire (void);
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value_type acquire (value_type count);
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value_type release (void);
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value_type release (value_type count);
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auto lock (void) { return acquire (); }
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auto unlock (void) { return release (); }
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value_type value (void) const;
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value_type operator++ (void);
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value_type operator-- (void);
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private:
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std::atomic<LONG> m_value;
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win32::handle m_handle;
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};
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};
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