87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
//
|
|
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
|
|
//
|
|
// 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/utils/common.h"
|
|
#include "td/utils/Status.h"
|
|
|
|
namespace td {
|
|
|
|
/*** PartsManager***/
|
|
struct Part {
|
|
int id;
|
|
int64 offset;
|
|
size_t size;
|
|
};
|
|
|
|
class PartsManager {
|
|
public:
|
|
Status init(int64 size, bool is_size_final, size_t part_size, const std::vector<int> &ready_parts,
|
|
bool use_part_count_limit) TD_WARN_UNUSED_RESULT;
|
|
bool ready();
|
|
bool unchecked_ready();
|
|
Status finish() TD_WARN_UNUSED_RESULT;
|
|
|
|
// returns empty part if nothing to return
|
|
Result<Part> start_part() TD_WARN_UNUSED_RESULT;
|
|
Status on_part_ok(int32 id, size_t part_size, size_t actual_size) TD_WARN_UNUSED_RESULT;
|
|
void on_part_failed(int32 id);
|
|
void set_known_prefix(size_t size, bool is_ready);
|
|
void set_need_check();
|
|
void set_checked_prefix_size(int64 size);
|
|
|
|
int64 get_checked_prefix_size() const;
|
|
int64 get_unchecked_ready_prefix_size();
|
|
int64 get_size() const;
|
|
int64 get_size_or_zero() const;
|
|
int64 get_expected_size() const;
|
|
int64 get_ready_size() const;
|
|
size_t get_part_size() const;
|
|
int32 get_part_count() const;
|
|
int32 get_ready_prefix_count();
|
|
|
|
private:
|
|
static constexpr int MAX_PART_COUNT = 3000;
|
|
static constexpr int MAX_PART_SIZE = 512 * (1 << 10);
|
|
static constexpr int64 MAX_FILE_SIZE = MAX_PART_SIZE * MAX_PART_COUNT;
|
|
|
|
enum class PartStatus { Empty, Pending, Ready };
|
|
|
|
bool need_check_{false};
|
|
int64 checked_prefix_size_{0};
|
|
|
|
bool known_prefix_flag_{false};
|
|
int64 known_prefix_size_;
|
|
|
|
int64 size_;
|
|
int64 min_size_;
|
|
int64 max_size_;
|
|
bool unknown_size_flag_;
|
|
int64 ready_size_;
|
|
|
|
size_t part_size_;
|
|
int part_count_;
|
|
int pending_count_;
|
|
int first_empty_part_;
|
|
int first_not_ready_part_;
|
|
vector<PartStatus> part_status_;
|
|
bool use_part_count_limit_;
|
|
|
|
void init_common(const vector<int> &ready_parts);
|
|
Status init_known_prefix(int64 known_prefix, size_t part_size,
|
|
const std::vector<int> &ready_parts) TD_WARN_UNUSED_RESULT;
|
|
Status init_no_size(size_t part_size, const std::vector<int> &ready_parts) TD_WARN_UNUSED_RESULT;
|
|
|
|
Part get_part(int id);
|
|
Part get_empty_part();
|
|
void on_part_start(int32 id);
|
|
void update_first_empty_part();
|
|
void update_first_not_ready_part();
|
|
};
|
|
|
|
} // namespace td
|