Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the master branch, built from commit 25d613dfbc.
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Function import_mangled

boost::dll::experimental::import_mangled

Synopsis

// In header: <boost/dll/import_mangled.hpp>


template<class ... Args> 
  result_type import_mangled(const boost::dll::fs::path & lib, 
                             const char * name, 
                             load_mode::type mode = load_mode::default_mode);
template<class ... Args> 
  result_type import_mangled(const boost::dll::fs::path & lib, 
                             const std::string & name, 
                             load_mode::type mode = load_mode::default_mode);
template<class ... Args> 
  result_type import_mangled(const smart_library & lib, const char * name);
template<class ... Args> 
  result_type import_mangled(const smart_library & lib, 
                             const std::string & name);
template<class ... Args> 
  result_type import_mangled(smart_library && lib, const char * name);
template<class ... Args> 
  result_type import_mangled(smart_library && lib, const std::string & name);
template<class ... Args> 
  result_type import_mangled(const shared_library & lib, const char * name);
template<class ... Args> 
  result_type import_mangled(const shared_library & lib, 
                             const std::string & name);
template<class ... Args> 
  result_type import_mangled(shared_library && lib, const char * name);
template<class ... Args> 
  result_type import_mangled(shared_library && lib, const std::string & name);

Description

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 alias names use boost::dll::import_alias method.

Examples:

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");
boost::shared_ptr<int> i = import_mangled<int>("test_lib.so", "integer_name");

Additionally you can also import overloaded symbols, including member-functions.

auto fp = import_mangled<void(int), void(double)>("test_lib.so", "func");
auto fp = import_mangled<my_class, void(int), void(double)>("test_lib.so", "func");

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.

  • *

    auto fp = import_mangled<my_class, void(int), void(double),
                             const my_class, void(int), void(double)>("test_lib.so", "func");
    

Template parameter T: Type of the symbol that we are going to import. Must be explicitly specified.

Parameters:

lib

Path to shared library or shared library to load function from.

mode

An mode that will be used on library load.

name

Null-terminated C or C++ mangled name of the function to import. Can handle std::string, char*, const char*.

Returns:

callable object if T is a function type, or boost::shared_ptr<T> if T is an object type.

Throws:


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