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event.h
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126 lines (103 loc) · 3.13 KB
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/*
* https://github.com/Kolkir/cpptask/
* Copyright (c) 2011, Kyrylo Kolodiazhnyi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _CPP_TASK_EVENT_H_
#define _CPP_TASK_EVENT_H_
#include "taskmanager.h"
#include <condition_variable>
namespace cpptask
{
class event
{
public:
event() noexcept
: signaled(false)
{}
~event()
{}
event(const event&) = delete;
const event& operator=(const event&) = delete;
void notify()
{
std::lock_guard<std::mutex> lock(guard);
signaled = true;
cv.notify_all();
}
void wait()
{
std::unique_lock<std::mutex> lock(guard);
cv.wait(lock, [&] {return signaled; });
signaled = false;
}
bool check()
{
std::unique_lock<std::mutex> lock(guard);
if (cv.wait_for(lock, std::chrono::milliseconds(0), [&] {return signaled; }))
{
signaled = false;
cv.notify_all();
return true;
}
return false;
}
private:
std::condition_variable cv;
std::mutex guard;
bool signaled;
};
//use this class only if you have corresponding process_lock object
class lockable_event
{
public:
typedef internal::EventManager EventManagerType;
lockable_event() noexcept
{}
~lockable_event()
{}
lockable_event(const lockable_event&) = delete;
const lockable_event& operator=(const lockable_event&) = delete;
void notify()
{
evt.notify();
internal::TaskManager::GetCurrent().GetEventManager().notify(internal::EventId::CustomEvent);
}
void lock()
{
evt.wait();
}
void unlock()
{
//do nothing
}
bool try_lock()
{
return evt.check();
}
private:
event evt;
};
}
#endif