mirror of
https://github.com/transmission/transmission
synced 2025-01-03 05:25:52 +00:00
d1a1a0adae
* fix: warning: deleted member function should be public [modernize-use-equals-delete] * fix: warning: variable has inline specifier but is implicitly inlined [readability-redundant-inline-specifier] * fix: warning: enum uses a larger base type than necessary for its value set [performance-enum-size] * fix: warning: initializer for member is redundant [readability-redundant-member-init] * warning: parameter is const-qualified in the function declaration; const-qualification of parameters only has an effect in function definitions [readability-avoid-const-params-in-decls]
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
// This file Copyright © Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#pragma once
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#include <cstddef> // for size_t
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#include <cstdint> // for uintX_t
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#include <optional>
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#include <string_view>
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#include <utility>
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#include "libtransmission/transmission.h"
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#include "libtransmission/file.h" // tr_sys_file_t
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#include "libtransmission/lru-cache.h"
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// A pool of open files that are cached while reading / writing torrents' data
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class tr_open_files
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{
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public:
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enum class Preallocation : uint8_t
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{
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None,
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Sparse,
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Full
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};
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[[nodiscard]] std::optional<tr_sys_file_t> get(tr_torrent_id_t tor_id, tr_file_index_t file_num, bool writable);
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[[nodiscard]] std::optional<tr_sys_file_t> get(
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tr_torrent_id_t tor_id,
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tr_file_index_t file_num,
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bool writable,
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std::string_view filename,
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Preallocation allocation,
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uint64_t file_size);
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void close_all();
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void close_torrent(tr_torrent_id_t tor_id);
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void close_file(tr_torrent_id_t tor_id, tr_file_index_t file_num);
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private:
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using Key = std::pair<tr_torrent_id_t, tr_file_index_t>;
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[[nodiscard]] static Key make_key(tr_torrent_id_t tor_id, tr_file_index_t file_num) noexcept
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{
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return std::make_pair(tor_id, file_num);
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}
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struct Val
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{
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Val() noexcept = default;
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Val(Val const&) = delete;
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Val& operator=(Val const&) = delete;
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Val(Val&& that) noexcept
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{
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*this = std::move(that);
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}
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Val& operator=(Val&& that) noexcept
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{
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std::swap(this->fd_, that.fd_);
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std::swap(this->writable_, that.writable_);
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return *this;
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}
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~Val();
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tr_sys_file_t fd_ = TR_BAD_SYS_FILE;
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bool writable_ = false;
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};
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static constexpr size_t MaxOpenFiles = 32U;
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tr_lru_cache<Key, Val, MaxOpenFiles> pool_;
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};
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