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// Copyright 2014 Renato Tegon Forti, Antony Polukhin.
// Copyright 2015 Antony Polukhin.
//
// 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_HPP
#define BOOST_DLL_IMPORT_HPP
#include <boost/config.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_object.hpp>
#include <boost/function.hpp>
#include <boost/make_shared.hpp>
#include <boost/dll/shared_library.hpp>
#include <boost/dll/detail/strip_calling_convention.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
/// \file boost/dll/import.hpp
/// \brief Contains all the boost::dll::import* reference counting
/// functions that hold a shared pointer to the instance of
/// boost::dll::shared_library.
namespace boost { namespace dll {
namespace detail {
template <class T>
class refc_function {
SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library> lib_;
T* func_ptr_;
public:
refc_function(const SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library>& lib, T* func_ptr) BOOST_NOEXCEPT
: lib_(lib)
, func_ptr_(func_ptr)
{}
operator T*() const BOOST_NOEXCEPT {
return func_ptr_;
}
};
template <class T, class = void>
struct import_type;
template <class T>
struct import_type<T, typename boost::disable_if<boost::is_object<T> >::type> {
typedef boost::dll::detail::refc_function<T> base_type;
typedef boost::function<
typename boost::dll::detail::strip_calling_convention<T>::type
> type;
};
template <class T>
struct import_type<T, typename boost::enable_if<boost::is_object<T> >::type> {
typedef SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<T> base_type;
typedef SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<T> type;
};
} // namespace detail
#ifndef BOOST_DLL_DOXYGEN
# define BOOST_DLL_IMPORT_RESULT_TYPE inline typename boost::dll::detail::import_type<T>::type
#endif
/*!
* Returns boost::function<T> or SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<T> that holds an imported function or variable
* from the loaded library and refcounts usage
* of the loaded shared library, so that it won't get unload until all copies of return value
* are not destroyed.
*
* This call will succeed if call to \forcedlink{shared_library}`::has(const char* )`
* function with the same symbol name returned `true`.
*
* For importing symbols by \b alias names use \forcedlink{import_alias} method.
*
* \b Examples:
* \code
* boost::function<int(int)> f = import<int(int)>(
* SWIFTEN_SHRPTR_NAMESPACE::make_shared<shared_library>("test_lib.so"),
* "integer_func_name"
* );
* \endcode
*
* \code
* boost::function<int(int)> f = import<int(int)>("test_lib.so", "integer_func_name");
* \endcode
*
* \code
* SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<int> i = import<int>("test_lib.so", "integer_name");
* \endcode
*
* \b Template \b parameter \b T: Type of the symbol that we are going to import. Must be explicitly specified.
*
* \param lib Path or shared pointer to 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 boost::function<T> if T is a function type, or SWIFTEN_SHRPTR_NAMESPACE::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 T>
BOOST_DLL_IMPORT_RESULT_TYPE import(const boost::filesystem::path& lib, const char* name,
load_mode::type mode = load_mode::default_mode);
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import(const boost::filesystem::path& lib, const std::string& name,
load_mode::type mode = load_mode::default_mode)
{
return boost::dll::import<T>(
SWIFTEN_SHRPTR_NAMESPACE::make_shared<boost::dll::shared_library>(lib, mode),
name.c_str()
);
}
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import(const SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library>& lib, const char* name) {
typedef typename boost::dll::detail::import_type<T>::base_type type;
return type(lib, &lib->get<T>(name));
}
//! \overload boost::dll::import(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import(const SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library>& lib, const std::string& name) {
return boost::dll::import<T>(lib, name.c_str());
}
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import(const boost::filesystem::path& lib, const char* name, load_mode::type mode) {
return boost::dll::import<T>(
SWIFTEN_SHRPTR_NAMESPACE::make_shared<boost::dll::shared_library>(lib, mode),
name
);
}
/*!
* Returns boost::function<T> or SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<T> that holds an imported function or variable
* from the loaded library and refcounts usage
* of the loaded shared library, so that it won't get unload until all copies of return value
* are not destroyed.
*
* This call will succeed if call to \forcedlink{shared_library}`::has(const char* )`
* function with the same symbol name returned `true`.
*
* For importing symbols by \b non \b alias names use \forcedlink{import} method.
*
* \b Examples:
* \code
* boost::function<int(int)> f = import_alias<int(int)>(
* SWIFTEN_SHRPTR_NAMESPACE::make_shared<shared_library>("test_lib.so"),
* "integer_func_alias_name"
* );
* \endcode
*
* \code
* boost::function<int(int)> f = import_alias<int(int)>("test_lib.so", "integer_func_alias_name");
* \endcode
*
* \code
* SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<int> i = import_alias<int>("test_lib.so", "integer_alias_name");
* \endcode
*
* \b Template \b parameter \b T: Type of the symbol alias that we are going to import. Must be explicitly specified.
*
* \param lib Path or shared pointer to library to load function from.
* \param name Null-terminated C or C++ mangled name of the function or variable to import. Can handle std::string, char*, const char*.
* \param mode An mode that will be used on library load.
*
* \return boost::function<T> if T is a function type, or SWIFTEN_SHRPTR_NAMESPACE::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 T>
BOOST_DLL_IMPORT_RESULT_TYPE import_alias(const boost::filesystem::path& lib, const char* name,
load_mode::type mode = load_mode::default_mode);
//! \overload boost::dll::import_alias(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import_alias(const boost::filesystem::path& lib, const std::string& name,
load_mode::type mode = load_mode::default_mode)
{
return boost::dll::import_alias<T>(
SWIFTEN_SHRPTR_NAMESPACE::make_shared<boost::dll::shared_library>(lib, mode),
name.c_str()
);
}
//! \overload boost::dll::import_alias(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import_alias(const SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library>& lib, const std::string& name) {
return boost::dll::import_alias<T>(lib, name.c_str());
}
//! \overload boost::dll::import_alias(const boost::filesystem::path& lib, const char* name, load_mode::type mode)
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import_alias(const SWIFTEN_SHRPTR_NAMESPACE::shared_ptr<shared_library>& lib, const char* name) {
typedef typename boost::dll::detail::import_type<T>::base_type type;
return type(lib, lib->get<T*>(name));
}
template <class T>
BOOST_DLL_IMPORT_RESULT_TYPE import_alias(const boost::filesystem::path& lib, const char* name, load_mode::type mode) {
return boost::dll::import_alias<T>(
SWIFTEN_SHRPTR_NAMESPACE::make_shared<boost::dll::shared_library>(lib, mode),
name
);
}
#undef BOOST_DLL_IMPORT_RESULT_TYPE
}} // boost::dll
#endif // BOOST_DLL_IMPORT_HPP
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