108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
|
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#if !defined(RXCPP_RX_BEHAVIOR_HPP)
|
||
|
|
#define RXCPP_RX_BEHAVIOR_HPP
|
||
|
|
|
||
|
|
#include "../rx-includes.hpp"
|
||
|
|
|
||
|
|
namespace rxcpp {
|
||
|
|
|
||
|
|
namespace subjects {
|
||
|
|
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
class behavior_observer : public detail::multicast_observer<T>
|
||
|
|
{
|
||
|
|
typedef behavior_observer<T> this_type;
|
||
|
|
typedef detail::multicast_observer<T> base_type;
|
||
|
|
|
||
|
|
class behavior_observer_state : public std::enable_shared_from_this<behavior_observer_state>
|
||
|
|
{
|
||
|
|
mutable std::mutex lock;
|
||
|
|
mutable T value;
|
||
|
|
|
||
|
|
public:
|
||
|
|
behavior_observer_state(T first)
|
||
|
|
: value(first)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void reset(T v) const {
|
||
|
|
std::unique_lock<std::mutex> guard(lock);
|
||
|
|
value = std::move(v);
|
||
|
|
}
|
||
|
|
T get() const {
|
||
|
|
std::unique_lock<std::mutex> guard(lock);
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
std::shared_ptr<behavior_observer_state> state;
|
||
|
|
|
||
|
|
public:
|
||
|
|
behavior_observer(T f, composite_subscription l)
|
||
|
|
: base_type(l)
|
||
|
|
, state(std::make_shared<behavior_observer_state>(std::move(f)))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
subscriber<T> get_subscriber() const {
|
||
|
|
return make_subscriber<T>(this->get_id(), this->get_subscription(), observer<T, detail::behavior_observer<T>>(*this)).as_dynamic();
|
||
|
|
}
|
||
|
|
|
||
|
|
T get_value() const {
|
||
|
|
return state->get();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class V>
|
||
|
|
void on_next(V v) const {
|
||
|
|
state->reset(v);
|
||
|
|
base_type::on_next(std::move(v));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
class behavior
|
||
|
|
{
|
||
|
|
detail::behavior_observer<T> s;
|
||
|
|
|
||
|
|
public:
|
||
|
|
explicit behavior(T f, composite_subscription cs = composite_subscription())
|
||
|
|
: s(std::move(f), cs)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool has_observers() const {
|
||
|
|
return s.has_observers();
|
||
|
|
}
|
||
|
|
|
||
|
|
T get_value() const {
|
||
|
|
return s.get_value();
|
||
|
|
}
|
||
|
|
|
||
|
|
subscriber<T> get_subscriber() const {
|
||
|
|
return s.get_subscriber();
|
||
|
|
}
|
||
|
|
|
||
|
|
observable<T> get_observable() const {
|
||
|
|
auto keepAlive = s;
|
||
|
|
return make_observable_dynamic<T>([keepAlive](subscriber<T> o){
|
||
|
|
if (keepAlive.get_subscription().is_subscribed()) {
|
||
|
|
o.on_next(keepAlive.get_value());
|
||
|
|
}
|
||
|
|
keepAlive.add(keepAlive.get_subscriber(), std::move(o));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|