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tdlib-fork/tddb/td/db/binlog/ConcurrentBinlog.h

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/actor/actor.h"
#include "td/actor/PromiseFuture.h"
#include "td/db/binlog/Binlog.h"
#include "td/db/binlog/BinlogInterface.h"
#include "td/utils/buffer.h"
#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include <atomic>
#include <functional>
namespace td {
namespace detail {
class BinlogActor;
} // namespace detail
class ConcurrentBinlog : public BinlogInterface {
public:
using Callback = std::function<void(const BinlogEvent &)>;
Result<BinlogInfo> init(string path, const Callback &callback, DbKey db_key = DbKey::empty(),
DbKey old_db_key = DbKey::empty(), int scheduler_id = -1) TD_WARN_UNUSED_RESULT;
ConcurrentBinlog();
explicit ConcurrentBinlog(unique_ptr<Binlog> binlog, int scheduler_id = -1);
ConcurrentBinlog(const ConcurrentBinlog &other) = delete;
ConcurrentBinlog &operator=(const ConcurrentBinlog &other) = delete;
ConcurrentBinlog(ConcurrentBinlog &&other) = delete;
ConcurrentBinlog &operator=(ConcurrentBinlog &&other) = delete;
~ConcurrentBinlog() override;
void force_sync(Promise<> promise) override;
void force_flush() override;
void change_key(DbKey db_key, Promise<> promise) override;
uint64 next_id() override {
return last_id_.fetch_add(1, std::memory_order_relaxed);
}
uint64 next_id(int32 shift) override {
return last_id_.fetch_add(shift, std::memory_order_relaxed);
}
CSlice get_path() const {
return path_;
}
private:
void init_impl(unique_ptr<Binlog> binlog, int scheduler_id);
void close_impl(Promise<> promise) override;
void close_and_destroy_impl(Promise<> promise) override;
void add_raw_event_impl(uint64 id, BufferSlice &&raw_event, Promise<> promise, BinlogDebugInfo info) override;
ActorOwn<detail::BinlogActor> binlog_actor_;
string path_;
std::atomic<uint64> last_id_{0};
};
} // namespace td