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construct/ircd/mods.h

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3 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
namespace ircd::mods
{
struct mod;
struct log::log extern log;
extern const filesystem::path suffix;
filesystem::path prefix_if_relative(const filesystem::path &path);
filesystem::path postfixed(const filesystem::path &path);
filesystem::path unpostfixed(const filesystem::path &path);
template<class R, class F> R info(const filesystem::path &, F&& closure);
std::vector<std::string> sections(const filesystem::path &path);
std::vector<std::string> symbols(const filesystem::path &path);
std::vector<std::string> symbols(const filesystem::path &path, const string_view &section);
std::unordered_map<std::string, std::string> mangles(const std::vector<std::string> &);
std::unordered_map<std::string, std::string> mangles(const filesystem::path &path);
std::unordered_map<std::string, std::string> mangles(const filesystem::path &path, const string_view &section);
// Get the full path of a [valid] available module by name
filesystem::path fullpath(const string_view &name);
// Checks if loadable module containing a mapi header (does not verify the magic)
bool is_module(const filesystem::path &);
bool is_module(const filesystem::path &, std::string &why);
bool is_module(const filesystem::path &, std::nothrow_t);
}
/// Internal module representation
struct ircd::mods::mod
:std::enable_shared_from_this<mod>
{
static std::stack<mod *> loading; // State of current dlopen() recursion.
static std::map<string_view, mod *, std::less<>> loaded;
filesystem::path path;
load_mode::type mode;
std::deque<mod *> children;
std::unordered_map<std::string, std::string> mangles;
boost::dll::shared_library handle;
const std::string _name;
const std::string _location;
mapi::header *header;
// Metadata
auto &operator[](const std::string &s) const { return header->meta.operator[](s); }
auto &operator[](const std::string &s) { return header->meta.operator[](s); }
auto &name() const { return _name; }
auto &location() const { return _location; }
auto &version() const { return header->version; }
auto &description() const { return (*this)["description"]; }
bool unload();
mod(const filesystem::path &,
const load_mode::type & = load_mode::rtld_local | load_mode::rtld_now);
mod(mod &&) = delete;
mod(const mod &) = delete;
mod &operator=(mod &&) = delete;
mod &operator=(const mod &) = delete;
~mod() noexcept;
};