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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#pragma once
#if !defined(RXCPP_OPERATORS_RX_WINDOW_WITH_TIME_OR_COUNT_HPP)
#define RXCPP_OPERATORS_RX_WINDOW_WITH_TIME_OR_COUNT_HPP
#include "../rx-includes.hpp"
namespace rxcpp {
namespace operators {
namespace detail {
template<class T, class Duration, class Coordination>
struct window_with_time_or_count
{
typedef rxu::decay_t<T> source_value_type;
typedef rxu::decay_t<Coordination> coordination_type;
typedef typename coordination_type::coordinator_type coordinator_type;
typedef rxu::decay_t<Duration> duration_type;
struct window_with_time_or_count_values
{
window_with_time_or_count_values(duration_type p, int n, coordination_type c)
: period(p)
, count(n)
, coordination(c)
{
}
duration_type period;
int count;
coordination_type coordination;
};
window_with_time_or_count_values initial;
window_with_time_or_count(duration_type period, int count, coordination_type coordination)
: initial(period, count, coordination)
{
}
template<class Subscriber>
struct window_with_time_or_count_observer : public observer_base<observable<T>>
{
typedef window_with_time_or_count_observer<Subscriber> this_type;
typedef observer_base<observable<T>> base_type;
typedef typename base_type::value_type value_type;
typedef rxu::decay_t<Subscriber> dest_type;
typedef observer<T, this_type> observer_type;
struct window_with_time_or_count_subscriber_values : public window_with_time_or_count_values
{
window_with_time_or_count_subscriber_values(dest_type d, window_with_time_or_count_values v, coordinator_type c)
: window_with_time_or_count_values(std::move(v))
, dest(std::move(d))
, coordinator(std::move(c))
, worker(std::move(coordinator.get_worker()))
, cursor(0)
, subj_id(0)
{
}
dest_type dest;
coordinator_type coordinator;
rxsc::worker worker;
mutable int cursor;
mutable int subj_id;
mutable rxcpp::subjects::subject<T> subj;
};
typedef std::shared_ptr<window_with_time_or_count_subscriber_values> state_type;
state_type state;
window_with_time_or_count_observer(dest_type d, window_with_time_or_count_values v, coordinator_type c)
: state(std::make_shared<window_with_time_or_count_subscriber_values>(window_with_time_or_count_subscriber_values(std::move(d), std::move(v), std::move(c))))
{
state->dest.on_next(state->subj.get_observable().as_dynamic());
auto new_id = state->subj_id;
auto produce_time = state->worker.now() + state->period;
auto localState = state;
state->worker.schedule(produce_time, [new_id, produce_time, localState](const rxsc::schedulable&){
release_window(new_id, produce_time, localState);
});
}
static void release_window(int id, rxsc::scheduler::clock_type::time_point expected, state_type state) {
if (id != state->subj_id)
return;
state->subj.get_subscriber().on_completed();
state->subj = rxcpp::subjects::subject<T>();
state->dest.on_next(state->subj.get_observable().as_dynamic());
state->cursor = 0;
auto new_id = ++state->subj_id;
auto produce_time = expected + state->period;
auto localState = state;
state->worker.schedule(produce_time, [new_id, produce_time, localState](const rxsc::schedulable&){
release_window(new_id, produce_time, localState);
});
}
void on_next(T v) const {
state->subj.get_subscriber().on_next(v);
if (++state->cursor == state->count) {
release_window(state->subj_id, state->worker.now(), state);
}
}
void on_error(std::exception_ptr e) const {
state->subj.get_subscriber().on_error(e);
state->dest.on_error(e);
}
void on_completed() const {
state->subj.get_subscriber().on_completed();
state->dest.on_completed();
}
static subscriber<T, observer_type> make(dest_type d, window_with_time_or_count_values v) {
auto cs = d.get_subscription();
auto coordinator = v.coordination.create_coordinator(cs);
return make_subscriber<T>(std::move(cs), observer_type(this_type(std::move(d), std::move(v), std::move(coordinator))));
}
};
template<class Subscriber>
auto operator()(Subscriber dest) const
-> decltype(window_with_time_or_count_observer<Subscriber>::make(std::move(dest), initial)) {
return window_with_time_or_count_observer<Subscriber>::make(std::move(dest), initial);
}
};
template<class Duration, class Coordination>
class window_with_time_or_count_factory
{
typedef rxu::decay_t<Duration> duration_type;
typedef rxu::decay_t<Coordination> coordination_type;
duration_type period;
int count;
coordination_type coordination;
public:
window_with_time_or_count_factory(duration_type p, int n, coordination_type c) : period(p), count(n), coordination(c) {}
template<class Observable>
auto operator()(Observable&& source)
-> decltype(source.template lift<observable<rxu::value_type_t<rxu::decay_t<Observable>>>>(window_with_time_or_count<rxu::value_type_t<rxu::decay_t<Observable>>, Duration, Coordination>(period, count, coordination))) {
return source.template lift<observable<rxu::value_type_t<rxu::decay_t<Observable>>>>(window_with_time_or_count<rxu::value_type_t<rxu::decay_t<Observable>>, Duration, Coordination>(period, count, coordination));
}
};
}
template<class Duration, class Coordination>
inline auto window_with_time_or_count(Duration period, int count, Coordination coordination)
-> detail::window_with_time_or_count_factory<Duration, Coordination> {
return detail::window_with_time_or_count_factory<Duration, Coordination>(period, count, coordination);
}
}
}
#endif
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