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#pragma once
#include "../std/algorithm.hpp"
#include "../std/mutex.hpp"
#include "../std/vector.hpp"
namespace my
{
/// This class represents a thread-safe observers list. It allows to
/// add/remove observers as well as trigger them all.
template <typename TObserver>
class ObserverList
{
public:
bool Add(TObserver & observer)
{
lock_guard<mutex> lock(m_observersLock);
auto it = find(m_observers.begin(), m_observers.end(), &observer);
if (it != m_observers.end())
return false;
m_observers.push_back(&observer);
return true;
}
bool Remove(TObserver & observer)
{
lock_guard<mutex> lock(m_observersLock);
auto it = find(m_observers.begin(), m_observers.end(), &observer);
if (it == m_observers.end())
return false;
m_observers.erase(it);
return true;
}
template <typename F, typename... Args>
void ForEach(F fn, Args const &... args)
{
lock_guard<mutex> lock(m_observersLock);
for (TObserver * observer : m_observers)
(observer->*fn)(args...);
}
private:
vector<TObserver *> m_observers;
mutex m_observersLock;
};
} // namespace my
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