1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// Copyright 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)
#include "../b2_workarounds.hpp" // contains dll_test::replace_with_full_path
//[smart_lib_setup
#include <boost/dll/smart_library.hpp> // for import_alias
#include <iostream>
#include <memory>
namespace dll = boost::dll;
struct alias;
int main(int argc, char* argv[]) {
/*<-*/ b2_workarounds::argv_to_path_guard guard(argc, argv); /*->*/
boost::dll::fs::path lib_path(argv[1]); // argv[1] contains path to directory with our plugin library
dll::smart_lib lib(lib_path); // smart library instance
//]
//[smart_lib_size
auto size_f = lib.get_function<std::size_t()>("space::my_plugin::size"); //get the size function
auto size = size_f(); // get the size of the class
std::unique_ptr<char[], size> buffer(new char[size]); //allocate a buffer for the import
alias & inst = *reinterpret_cast<alias*>(buffer.get()); //cast it to our alias type.
//]
//[smart_lib_type_alias
lib.add_type_alias("space::my_plugin"); //add an alias, so i can import a class that is not declared here
//]
//[smart_lib_ctor
auto ctor = lib.get_constructor<alias(const std::string&)>(); //get the constructor
ctor.call_standard(&inst, "MyName"); //call the non-allocating constructor. The allocating-constructor is a non-portable feature
//]
//[smart_lib_name
auto name_f = lib.get_mem_fn<const alias, std::string()>("name");//import the name function
std::cout << "Name Call: " << (inst.*name_f)() << std::endl;
//]
//[smart_lib_calculate
//import both calculate functions
auto calc_f = lib.get_mem_fn<alias, float(float, float)>("calculate");
auto calc_i = lib.get_mem_fn<alias, int(int, int)> ("calculate");
std::cout << "calc(float): " << (inst.*calc_f)(5., 2.) << std::endl;
std::cout << "calc(int) : " << (inst.*calc_f)(5, 2) << std::endl;
//]
//[smart_lib_var
auto & var = lib.get_variable<int>("space::my_plugin::value");
cout << "value " << var << endl;
//]
//[smart_lib_dtor
auto dtor = lib.get_destructor<alias>(); //get the destructor
dtor.call_standard(&inst);
std::cout << "plugin->calculate(1.5, 1.5) call: " << plugin->calculate(1.5, 1.5) << std::endl;
}
//]
|
