mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-30 09:07:28 +03:00
307 lines
11 KiB
C++
307 lines
11 KiB
C++
// Copyright 2015-2016 Klemens D. Morgenstern
|
|
//
|
|
// 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)
|
|
|
|
|
|
#ifndef BOOST_DLL_IMPORT_MANGLED_HPP_
|
|
#define BOOST_DLL_IMPORT_MANGLED_HPP_
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/make_shared.hpp>
|
|
#include <boost/move/move.hpp>
|
|
#include <boost/dll/smart_library.hpp>
|
|
#include <boost/dll/detail/import_mangled_helpers.hpp>
|
|
#include <boost/utility/addressof.hpp>
|
|
#include <boost/utility/enable_if.hpp>
|
|
#include <boost/type_traits/conditional.hpp>
|
|
#include <boost/type_traits/is_object.hpp>
|
|
|
|
|
|
|
|
#ifdef BOOST_HAS_PRAGMA_ONCE
|
|
# pragma once
|
|
#endif
|
|
|
|
namespace boost { namespace dll { namespace experimental {
|
|
|
|
namespace detail
|
|
{
|
|
|
|
|
|
|
|
template <class ... Ts>
|
|
class mangled_library_function {
|
|
// Copying of `boost::dll::shared_library` is very expensive, so we use a `shared_ptr` to make it faster.
|
|
boost::shared_ptr<function_tuple<Ts...>> f_;
|
|
|
|
public:
|
|
inline mangled_library_function(const boost::shared_ptr<shared_library>& lib, Ts*... func_ptr) BOOST_NOEXCEPT
|
|
: f_(lib, new function_tuple<Ts...>(func_ptr...))
|
|
{}
|
|
|
|
|
|
// Compilation error at this point means that imported function
|
|
// was called with unmatching parameters.
|
|
//
|
|
// Example:
|
|
// auto f = dll::import_mangled<void(int), void(double)>("function", "lib.so");
|
|
// f("Hello"); // error: invalid conversion from 'const char*' to 'int'
|
|
// f(1, 2); // error: too many arguments to function
|
|
// f(); // error: too few arguments to function
|
|
template <class... Args>
|
|
inline auto operator()(Args&&... args) const
|
|
-> decltype( (*f_)(static_cast<Args&&>(args)...) )
|
|
{
|
|
return (*f_)(static_cast<Args&&>(args)...);
|
|
}
|
|
};
|
|
|
|
|
|
template<class Class, class Sequence>
|
|
class mangled_library_mem_fn;
|
|
|
|
template <class Class, class ... Ts>
|
|
class mangled_library_mem_fn<Class, sequence<Ts...>> {
|
|
// Copying of `boost::dll::shared_library` is very expensive, so we use a `shared_ptr` to make it faster.
|
|
typedef mem_fn_tuple<Ts...> call_tuple_t;
|
|
boost::shared_ptr<call_tuple_t> f_;
|
|
|
|
public:
|
|
inline mangled_library_mem_fn(const boost::shared_ptr<shared_library>& lib,
|
|
typename Ts::mem_fn... func_ptr) BOOST_NOEXCEPT
|
|
: f_(lib, new call_tuple_t(func_ptr...))
|
|
{}
|
|
|
|
template <class ClassIn, class... Args>
|
|
inline auto operator()(ClassIn *cl, Args&&... args) const -> decltype( (*f_)(cl, static_cast<Args&&>(args)...) )
|
|
{
|
|
return (*f_)(cl, static_cast<Args&&>(args)...);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
// simple enough to be here
|
|
template<class Seq> struct is_variable : boost::false_type {};
|
|
template<typename T> struct is_variable<sequence<T>> : boost::is_object<T> {};
|
|
|
|
template <class Sequence,
|
|
bool isFunction = is_function_seq<Sequence>::value,
|
|
bool isMemFn = is_mem_fn_seq <Sequence>::value,
|
|
bool isVariable = is_variable <Sequence>::value>
|
|
struct mangled_import_type;
|
|
|
|
template <class ...Args>
|
|
struct mangled_import_type<sequence<Args...>, true,false,false> //is function
|
|
{
|
|
typedef boost::dll::experimental::detail::mangled_library_function<Args...> type;
|
|
static type make(
|
|
const boost::dll::experimental::smart_library& p,
|
|
const std::string& name)
|
|
{
|
|
return type(
|
|
boost::make_shared<shared_library>(p.shared_lib()),
|
|
boost::addressof(p.get_function<Args>(name))...);
|
|
}
|
|
};
|
|
|
|
template <class Class, class ...Args>
|
|
struct mangled_import_type<sequence<Class, Args...>, false, true, false> //is member-function
|
|
{
|
|
typedef typename boost::dll::experimental::detail::make_mem_fn_seq<Class, Args...>::type actual_sequence;
|
|
typedef typename boost::dll::experimental::detail::mangled_library_mem_fn<Class, actual_sequence> type;
|
|
|
|
|
|
template<class ... ArgsIn>
|
|
static type make_impl(
|
|
const boost::dll::experimental::smart_library& p,
|
|
const std::string & name,
|
|
sequence<ArgsIn...> * )
|
|
{
|
|
return type(boost::make_shared<shared_library>(p.shared_lib()),
|
|
p.get_mem_fn<typename ArgsIn::class_type, typename ArgsIn::func_type>(name)...);
|
|
}
|
|
|
|
static type make(
|
|
const boost::dll::experimental::smart_library& p,
|
|
const std::string& name)
|
|
{
|
|
return make_impl(p, name, static_cast<actual_sequence*>(nullptr));
|
|
}
|
|
|
|
};
|
|
|
|
template <class T>
|
|
struct mangled_import_type<sequence<T>, false, false, true> //is variable
|
|
{
|
|
typedef boost::shared_ptr<T> type;
|
|
|
|
static type make(
|
|
const boost::dll::experimental::smart_library& p,
|
|
const std::string& name)
|
|
{
|
|
return type(
|
|
boost::make_shared<shared_library>(p.shared_lib()),
|
|
boost::addressof(p.get_variable<T>(name)));
|
|
}
|
|
|
|
};
|
|
|
|
|
|
} // namespace detail
|
|
|
|
|
|
#ifndef BOOST_DLL_DOXYGEN
|
|
# define BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE inline typename \
|
|
boost::dll::experimental::detail::mangled_import_type<boost::dll::experimental::detail::sequence<Args...>>::type
|
|
#endif
|
|
|
|
/*
|
|
* Variants:
|
|
* import_mangled<int>("Stuff");
|
|
* import_mangled<thingy(xyz)>("Function");
|
|
* import mangled<thingy, void(int)>("Function");
|
|
*/
|
|
|
|
/*!
|
|
* Returns callable object or boost::shared_ptr<T> that holds the symbol imported
|
|
* from the loaded library. Returned value refcounts usage
|
|
* of the loaded shared library, so that it won't get unload until all copies of return value
|
|
* are not destroyed.
|
|
*
|
|
* For importing symbols by \b alias names use \forcedlink{import_alias} method.
|
|
*
|
|
* \b Examples:
|
|
*
|
|
* \code
|
|
* boost::function<int(int)> f = import_mangled<int(int)>("test_lib.so", "integer_func_name");
|
|
*
|
|
* auto f_cpp11 = import_mangled<int(int)>("test_lib.so", "integer_func_name");
|
|
* \endcode
|
|
*
|
|
* \code
|
|
* boost::shared_ptr<int> i = import_mangled<int>("test_lib.so", "integer_name");
|
|
* \endcode
|
|
*
|
|
* Additionally you can also import overloaded symbols, including member-functions.
|
|
*
|
|
* \code
|
|
* auto fp = import_mangled<void(int), void(double)>("test_lib.so", "func");
|
|
* \endcode
|
|
*
|
|
* \code
|
|
* auto fp = import_mangled<my_class, void(int), void(double)>("test_lib.so", "func");
|
|
* \endcode
|
|
*
|
|
* If qualified member-functions are needed, this can be set by repeating the class name with const or volatile.
|
|
* All following signatures after the redifintion will use this, i.e. the latest.
|
|
*
|
|
* * * \code
|
|
* auto fp = import_mangled<my_class, void(int), void(double),
|
|
* const my_class, void(int), void(double)>("test_lib.so", "func");
|
|
* \endcode
|
|
*
|
|
* \b Template \b parameter \b T: Type of the symbol that we are going to import. Must be explicitly specified.
|
|
*
|
|
* \param lib Path to shared library or shared library to load function from.
|
|
* \param name Null-terminated C or C++ mangled name of the function to import. Can handle std::string, char*, const char*.
|
|
* \param mode An mode that will be used on library load.
|
|
*
|
|
* \return callable object if T is a function type, or boost::shared_ptr<T> if T is an object type.
|
|
*
|
|
* \throw boost::system::system_error if symbol does not exist or if the DLL/DSO was not loaded.
|
|
* Overload that accepts path also throws std::bad_alloc in case of insufficient memory.
|
|
*/
|
|
|
|
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const boost::filesystem::path& lib, const char* name,
|
|
load_mode::type mode = load_mode::default_mode)
|
|
{
|
|
typedef typename boost::dll::experimental::detail::mangled_import_type<
|
|
boost::dll::experimental::detail::sequence<Args...>> type;
|
|
|
|
boost::dll::experimental::smart_library p(lib, mode);
|
|
//the load
|
|
return type::make(p, name);
|
|
}
|
|
|
|
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const boost::filesystem::path& lib, const std::string& name,
|
|
load_mode::type mode = load_mode::default_mode)
|
|
{
|
|
return import_mangled<Args...>(lib, name.c_str(), mode);
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const smart_library& lib, const char* name) {
|
|
typedef typename boost::dll::experimental::detail::mangled_import_type<detail::sequence<Args...>> type;
|
|
|
|
return type::make(lib, name);
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const smart_library& lib, const std::string& name) {
|
|
return import_mangled<Args...>(lib, name.c_str());
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(BOOST_RV_REF(smart_library) lib, const char* name) {
|
|
typedef typename boost::dll::experimental::detail::mangled_import_type<detail::sequence<Args...>> type;
|
|
|
|
return type::make(lib, name);
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(BOOST_RV_REF(smart_library) lib, const std::string& name) {
|
|
return import_mangled<Args...>(boost::move(lib), name.c_str());
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const shared_library& lib, const char* name) {
|
|
typedef typename boost::dll::experimental::detail::mangled_import_type<detail::sequence<Args...>> type;
|
|
|
|
boost::shared_ptr<boost::dll::experimental::smart_library> p = boost::make_shared<boost::dll::experimental::smart_library>(lib);
|
|
return type::make(p, name);
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(const shared_library& lib, const std::string& name) {
|
|
return import_mangled<Args...>(lib, name.c_str());
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(BOOST_RV_REF(shared_library) lib, const char* name) {
|
|
typedef typename boost::dll::experimental::detail::mangled_import_type<detail::sequence<Args...>> type;
|
|
|
|
boost::dll::experimental::smart_library p(boost::move(lib));
|
|
|
|
return type::make(p, name);
|
|
}
|
|
|
|
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
|
|
template <class ...Args>
|
|
BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE import_mangled(BOOST_RV_REF(shared_library) lib, const std::string& name) {
|
|
return import_mangled<Args...>(boost::move(lib), name.c_str());
|
|
}
|
|
|
|
#undef BOOST_DLL_MANGLED_IMPORT_RESULT_TYPE
|
|
|
|
}}}
|
|
|
|
|
|
#endif /* BOOST_DLL_IMPORT_MANGLED_HPP_ */
|