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66 lines
1.7 KiB
66 lines
1.7 KiB
// Copyright © 2015 Jean-Luc Deltombe (LX3JL). All rights reserved.
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// urfd -- The universal reflector
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// Copyright © 2021 Thomas A. Early N7TAE
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#include "Semaphore.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// constructor
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CSemaphore::CSemaphore()
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{
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// Initialized as locked.
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m_Count = 0;
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// operation
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void CSemaphore::Reset(void)
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{
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std::unique_lock<decltype(m_Mutex)> lock(m_Mutex);
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m_Count = 0;
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}
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void CSemaphore::Notify(void)
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{
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std::unique_lock<std::mutex> lock(m_Mutex);
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m_Count++;
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m_Condition.notify_one();
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}
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void CSemaphore::Wait(void)
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{
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std::unique_lock<std::mutex> lock(m_Mutex);
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m_Condition.wait(lock, [&] { return m_Count > 0; });
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m_Count--;
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}
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bool CSemaphore::WaitFor(unsigned ms)
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{
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std::chrono::milliseconds timespan(ms);
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std::unique_lock<decltype(m_Mutex)> lock(m_Mutex);
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auto ok = m_Condition.wait_for(lock, timespan, [&] { return m_Count > 0; });
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if ( ok )
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{
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m_Count--;
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}
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return ok;
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}
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