mirror of
https://github.com/matrix-construct/construct
synced 2024-10-30 10:28:55 +01:00
274 lines
7.2 KiB
C++
274 lines
7.2 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.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_MODS_H
|
|
|
|
/// Modules system
|
|
namespace ircd::mods
|
|
{
|
|
IRCD_EXCEPTION(ircd::error, error)
|
|
IRCD_EXCEPTION(error, filesystem_error)
|
|
IRCD_EXCEPTION(error, invalid_export)
|
|
IRCD_EXCEPTION(error, expired_symbol)
|
|
IRCD_EXCEPTION(error, undefined_symbol)
|
|
IRCD_EXCEPTION(error, demangle_error)
|
|
IRCD_EXCEPTION(demangle_error, not_mangled)
|
|
|
|
struct mod;
|
|
struct module;
|
|
struct sym_ptr;
|
|
template<class T> struct import;
|
|
template<class T> struct import_shared;
|
|
|
|
struct paths extern paths;
|
|
|
|
// Platform (.so|.dll) postfixing
|
|
std::string postfixed(const std::string &name);
|
|
std::string unpostfixed(const std::string &name);
|
|
|
|
// Section & Symbol utilites
|
|
std::vector<std::string> sections(const std::string &fullpath);
|
|
std::vector<std::string> symbols(const std::string &fullpath, const std::string §ion);
|
|
std::vector<std::string> symbols(const std::string &fullpath);
|
|
std::unordered_map<std::string, std::string> mangles(const std::vector<std::string> &);
|
|
std::unordered_map<std::string, std::string> mangles(const std::string &fullpath, const std::string §ion);
|
|
std::unordered_map<std::string, std::string> mangles(const std::string &fullpath);
|
|
|
|
// Find module names where symbol resides
|
|
bool has_symbol(const std::string &name, const std::string &symbol);
|
|
std::vector<std::string> find_symbol(const std::string &symbol);
|
|
|
|
// returns dir/name of first dir containing 'name' (and this will be a loadable module)
|
|
// Unlike libltdl, the reason each individual candidate failed is presented in a vector.
|
|
std::string search(const std::string &name, std::vector<std::string> &why);
|
|
std::string search(const std::string &name);
|
|
|
|
// Potential modules available to load
|
|
std::forward_list<std::string> available();
|
|
bool available(const std::string &name);
|
|
bool loaded(const std::string &name);
|
|
}
|
|
|
|
// Bring struct module into main ircd::
|
|
namespace ircd
|
|
{
|
|
using mods::module;
|
|
using mods::import;
|
|
using mods::import_shared;
|
|
}
|
|
|
|
struct ircd::mods::paths
|
|
:std::vector<std::string>
|
|
{
|
|
bool added(const std::string &dir) const;
|
|
|
|
bool del(const std::string &dir);
|
|
bool add(const std::string &dir, std::nothrow_t);
|
|
bool add(const std::string &dir);
|
|
|
|
paths();
|
|
};
|
|
|
|
struct ircd::mods::module
|
|
:std::shared_ptr<mod>
|
|
{
|
|
const std::string &name() const;
|
|
const std::string &path() const;
|
|
const std::string &mangle(const std::string &) const;
|
|
|
|
bool has(const std::string &name) const;
|
|
|
|
template<class T = uint8_t> const T *ptr(const std::string &name) const;
|
|
template<class T = uint8_t> T *ptr(const std::string &name);
|
|
|
|
template<class T> const T &get(const std::string &name) const;
|
|
template<class T> T &get(const std::string &name);
|
|
|
|
module(std::shared_ptr<mod> ptr = {})
|
|
:std::shared_ptr<mod>{std::move(ptr)}
|
|
{}
|
|
|
|
module(const std::string &name);
|
|
~module() noexcept;
|
|
};
|
|
|
|
namespace ircd::mods
|
|
{
|
|
template<> const uint8_t *module::ptr<const uint8_t>(const std::string &name) const;
|
|
template<> uint8_t *module::ptr<uint8_t>(const std::string &name);
|
|
}
|
|
|
|
template<class T>
|
|
T &
|
|
ircd::mods::module::get(const std::string &name)
|
|
{
|
|
return *ptr<T>(name);
|
|
}
|
|
|
|
template<class T>
|
|
const T &
|
|
ircd::mods::module::get(const std::string &name)
|
|
const
|
|
{
|
|
return *ptr<T>(name);
|
|
}
|
|
|
|
template<class T>
|
|
T *
|
|
ircd::mods::module::ptr(const std::string &name)
|
|
{
|
|
return reinterpret_cast<T *>(ptr<uint8_t>(name));
|
|
}
|
|
|
|
template<class T>
|
|
const T *
|
|
ircd::mods::module::ptr(const std::string &name)
|
|
const
|
|
{
|
|
return reinterpret_cast<const T *>(ptr<const uint8_t>(name));
|
|
}
|
|
|
|
/// Representation of a symbol in a loaded library (non-template; low level).
|
|
///
|
|
class ircd::mods::sym_ptr
|
|
:std::weak_ptr<mod>
|
|
{
|
|
void *ptr;
|
|
|
|
public:
|
|
operator bool() const { return !expired(); }
|
|
bool operator!() const { return expired(); }
|
|
|
|
template<class T> const T *get() const;
|
|
template<class T> const T *operator->() const;
|
|
template<class T> const T &operator*() const;
|
|
template<class T, class... args> auto operator()(args&&... a) const;
|
|
|
|
template<class T> T *get();
|
|
template<class T> T *operator->();
|
|
template<class T> T &operator*();
|
|
|
|
sym_ptr(const std::string &modname, const std::string &symname);
|
|
~sym_ptr() noexcept;
|
|
};
|
|
|
|
template<class T>
|
|
T &
|
|
ircd::mods::sym_ptr::operator*()
|
|
{
|
|
if(unlikely(expired()))
|
|
throw expired_symbol("The reference to a symbol in another module is no longer valid");
|
|
|
|
return *get<T>();
|
|
}
|
|
|
|
template<class T>
|
|
T *
|
|
ircd::mods::sym_ptr::operator->()
|
|
{
|
|
return get<T>();
|
|
}
|
|
|
|
template<class T>
|
|
T *
|
|
ircd::mods::sym_ptr::get()
|
|
{
|
|
return reinterpret_cast<T *>(ptr);
|
|
}
|
|
|
|
template<class T,
|
|
class... args>
|
|
auto
|
|
ircd::mods::sym_ptr::operator()(args&&... a)
|
|
const
|
|
{
|
|
return (*get<T>())(std::forward<args>(a)...);
|
|
}
|
|
|
|
template<class T>
|
|
const T &
|
|
ircd::mods::sym_ptr::operator*()
|
|
const
|
|
{
|
|
if(unlikely(expired()))
|
|
throw expired_symbol("The const reference to a symbol in another module is no longer valid");
|
|
|
|
return *get<T>();
|
|
}
|
|
|
|
template<class T>
|
|
const T *
|
|
ircd::mods::sym_ptr::operator->()
|
|
const
|
|
{
|
|
return get<T>();
|
|
}
|
|
|
|
template<class T>
|
|
const T *
|
|
ircd::mods::sym_ptr::get()
|
|
const
|
|
{
|
|
return reinterpret_cast<const T *>(ptr);
|
|
}
|
|
|
|
/// Representation of a symbol in a loaded shared library
|
|
///
|
|
template<class T>
|
|
struct ircd::mods::import
|
|
:sym_ptr
|
|
{
|
|
template<class... args>
|
|
auto operator()(args&&... a) const
|
|
{
|
|
return sym_ptr::operator()<T>(std::forward<args>(a)...);
|
|
}
|
|
|
|
const T *operator->() const { return sym_ptr::operator-><T>(); }
|
|
const T &operator*() const { return sym_ptr::operator*<T>(); }
|
|
operator const T &() const { return sym_ptr::operator*<T>(); }
|
|
|
|
T *operator->() { return sym_ptr::operator-><T>(); }
|
|
T &operator*() { return sym_ptr::operator*<T>(); }
|
|
operator T &() { return sym_ptr::operator*<T>(); }
|
|
|
|
using sym_ptr::sym_ptr;
|
|
};
|
|
|
|
/// Convenience for importing an std::shared_ptr<T> from a loaded lib
|
|
///
|
|
template<class T>
|
|
struct ircd::mods::import_shared
|
|
:import<std::shared_ptr<T>>
|
|
,std::shared_ptr<T>
|
|
{
|
|
using std::shared_ptr<T>::get;
|
|
using std::shared_ptr<T>::operator bool;
|
|
using std::shared_ptr<T>::operator->;
|
|
using std::shared_ptr<T>::operator*;
|
|
|
|
operator const T &() const { return std::shared_ptr<T>::operator*(); }
|
|
operator T &() { return std::shared_ptr<T>::operator*(); }
|
|
|
|
import_shared(const std::string &modname, const std::string &symname);
|
|
};
|
|
|
|
template<class T>
|
|
ircd::mods::import_shared<T>::import_shared(const std::string &modname,
|
|
const std::string &symname)
|
|
:import<std::shared_ptr<T>>
|
|
{
|
|
modname, symname
|
|
}
|
|
,std::shared_ptr<T>
|
|
{
|
|
import<std::shared_ptr<T>>::operator*()
|
|
}{}
|