tibia-client/src/framework/stdext/coroutine.h

101 lines
3.0 KiB
C
Raw Normal View History

/*
* Copyright (c) 2010-2013 OTClient <https://github.com/edubart/otclient>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef COROUTINE_H
#define COROUTINE_H
2012-08-04 17:35:39 +02:00
#include "thread.h"
#include <functional>
#include <cassert>
namespace stdext {
class coroutine
{
struct codata : public stdext::shared_object {
std::unique_ptr<std::thread> thread;
std::condition_variable conditionVar;
std::mutex mutex;
std::function<void()> func;
};
stdext::shared_object_ptr<codata> m;
void run() {
assert(m->func);
m->func();
std::lock_guard<std::mutex> lock(m->mutex);
m->func = nullptr;
m->conditionVar.notify_all();
}
public:
coroutine() : m(stdext::make_shared_object<codata>()) { }
coroutine(const coroutine& other) : m(other.m) { }
coroutine& operator=(const coroutine& other) { m = other.m; return *this; }
~coroutine() {
if(m.is_unique()) {
m->conditionVar.notify_all();
m->thread->join();
assert(!m->func);
}
}
void create(const std::function<void()>& func) {
assert(!!func && !m->func);
m->func = func;
}
void yield() const {
std::unique_lock<std::mutex> lock(m->mutex);
m->conditionVar.notify_all();
m->conditionVar.wait(lock);
}
void resume() {
if(!m->thread) {
std::unique_lock<std::mutex> lock(m->mutex);
m->thread.reset(new std::thread(std::bind(&coroutine::run, this)));
m->conditionVar.wait(lock); // wait for the thread to start
} else {
std::unique_lock<std::mutex> lock(m->mutex);
assert(m->func);
m->conditionVar.notify_all();
m->conditionVar.wait(lock);
}
}
void join() {
while(!is_finished())
resume();
}
bool is_suspended() { return !!m->func; }
bool is_finished() { return !m->func; }
};
};
#endif