transmission/libtransmission/peer-mgr-active-requests.h

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// This file Copyright © Mnemosyne LLC.
2022-08-08 18:05:39 +00:00
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
#ifndef LIBTRANSMISSION_PEER_MODULE
#error only the libtransmission peer module should #include this header.
#endif
#include <cstddef> // size_t
#include <ctime> // time_t
#include <memory>
#include <utility>
#include <vector>
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#include "libtransmission/transmission.h" // tr_block_index_t
struct tr_peer;
/**
* Bookkeeping for the active requests we have --
* e.g. the requests we've sent and are awaiting a response.
*/
class ActiveRequests
{
public:
ActiveRequests();
~ActiveRequests();
// record that we've requested `block` from `peer`
bool add(tr_block_index_t block, tr_peer* peer, time_t when);
// erase any record of a request for `block` from `peer`
bool remove(tr_block_index_t block, tr_peer const* peer);
// erase any record of requests to `peer` and return the previously-associated blocks
std::vector<tr_block_index_t> remove(tr_peer const* peer);
// erase any record of requests to `block` and return the previously-associated peers
std::vector<tr_peer*> remove(tr_block_index_t block);
// return true if there's a record of a request for `block` from `peer`
[[nodiscard]] bool has(tr_block_index_t block, tr_peer const* peer) const;
// count how many peers we're asking for `block`
[[nodiscard]] size_t count(tr_block_index_t block) const;
// count how many active block requests we have to `peer`
[[nodiscard]] size_t count(tr_peer const* peer) const;
// return the total number of active requests
[[nodiscard]] size_t size() const;
// returns the active requests sent before `when`
[[nodiscard]] std::vector<std::pair<tr_block_index_t, tr_peer*>> sentBefore(time_t when) const;
private:
class Impl;
std::unique_ptr<Impl> const impl_;
};