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task_stream.h
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task_stream.h
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#pragma once
#include "functional.h"
#include "event_loop.h"
#include "task.h"
#include "promise_stream.h"
namespace kaiu {
/*
* PromiseStream which calls callbacks (data/resolve/reject) in specified
* threads in a thread pool
*/
template <typename Result, typename Datum>
class AsyncPromiseStreamState : public PromiseStreamState<Result, Datum> {
public:
AsyncPromiseStreamState() = delete;
AsyncPromiseStreamState(EventLoop& loop,
const EventLoopPool stream_pool,
const EventLoopPool react_pool = EventLoopPool::same);
protected:
virtual void call_data_callback(Datum) override;
using completer_func = typename PromiseStreamState<Result, Datum>::completer_func;
virtual completer_func resolve_completer(Result) override;
virtual completer_func reject_completer(std::exception_ptr) override;
private:
EventLoop& loop;
EventLoopPool stream_pool;
EventLoopPool react_pool;
};
template <typename Result, typename Datum>
class AsyncPromiseStream : public PromiseStream<Result, Datum> {
public:
AsyncPromiseStream() = delete;
AsyncPromiseStream(EventLoop& loop,
const EventLoopPool stream_pool,
const EventLoopPool react_pool = EventLoopPool::same);
};
namespace promise {
/*** Promise-stream factories ***/
template <typename Result, typename Datum, typename... Args>
using UnboundTaskStream = Curried<PromiseStream<Result, Datum>, sizeof...(Args) + 1, StreamFactory<Result, Datum, EventLoop&, Args...>>;
template <typename Result, typename Datum, typename... Args>
using BoundTaskStream = Curried<PromiseStream<Result, Datum>, sizeof...(Args) + 1, StreamFactory<Result, Datum, EventLoop&, Args...>, EventLoop&>;
/* Parameter is a promise-stream factory, result is a streaming task */
template <typename Result, typename Datum, typename... Args>
UnboundTaskStream<Result, Datum, Args...> task_stream(
StreamFactory<Result, Datum, Args...> factory,
const EventLoopPool producer_pool,
const EventLoopPool consumer_pool = EventLoopPool::same,
const EventLoopPool reaction_pool = EventLoopPool::same);
template <typename Result, typename Datum, typename... Args>
UnboundTaskStream<Result, Datum, Args...> task_stream(
PromiseStream<Result, Datum> (&factory)(Args...),
const EventLoopPool producer_pool,
const EventLoopPool consumer_pool = EventLoopPool::same,
const EventLoopPool reaction_pool = EventLoopPool::same);
}
}
#ifndef task_stream_tcc
#include "task_stream.tcc"
#endif