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// Copyright Antony Polukhin, 2015-2026.

// 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)

// MinGW related workaround

#define BOOST_DLL_FORCE_ALIAS_INSTANTIATION

//[plugcpp_on_unload

#include <functional>

#include <vector>

#include <boost/dll/alias.hpp> // for BOOST_DLL_ALIAS

namespace my_namespace {

struct on_unload {

using callback_t = std::function<void()> ;

using this_type = on_unload;

~on_unload() {

for (std::size_t i = 0; i < callbacks_.size(); ++i) {

callback_t& function = callbacks_[i];

function(); // calling the callback

}

// not thread safe

static void add(const callback_t& function) {

static this_type instance;

instance.callbacks_.push_back(function);

}

private:

std::vector<callback_t> callbacks_;

on_unload() {} // prohibit construction outside of the `add` function

};

// Exporting the static "add" function with name "on_unload"

BOOST_DLL_ALIAS(my_namespace::on_unload::add, on_unload)

} // namespace my_namespace

//]

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