79 lines
1.2 KiB
C++
79 lines
1.2 KiB
C++
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// Event.cpp
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// Interfaces to the cEvent object representing a synchronization primitive that can be waited-for
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// Implemented using C++11 condition variable and mutex
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#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
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#include "Event.h"
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#include "Errors.h"
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cEvent::cEvent(void) :
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m_ShouldContinue(false)
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{
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}
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void cEvent::Wait(void)
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{
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{
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std::unique_lock<std::mutex> Lock(m_Mutex);
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m_CondVar.wait(Lock, [this](){ return m_ShouldContinue; });
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m_ShouldContinue = false;
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}
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}
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bool cEvent::Wait(unsigned a_TimeoutMSec)
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{
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auto dst = std::chrono::system_clock::now() + std::chrono::milliseconds(a_TimeoutMSec);
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bool Result;
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{
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std::unique_lock<std::mutex> Lock(m_Mutex); // We assume that this lock is acquired without much delay - we are the only user of the mutex
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Result = m_CondVar.wait_until(Lock, dst, [this](){ return m_ShouldContinue; });
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m_ShouldContinue = false;
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}
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return Result;
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}
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void cEvent::Set(void)
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{
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{
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std::unique_lock<std::mutex> Lock(m_Mutex);
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m_ShouldContinue = true;
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}
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m_CondVar.notify_one();
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}
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void cEvent::SetAll(void)
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{
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{
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std::unique_lock<std::mutex> Lock(m_Mutex);
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m_ShouldContinue = true;
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}
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m_CondVar.notify_all();
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}
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