scope_exit.hpp

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//
// Copyright 2019 Ettus Research, a National Instruments Brand
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
 
#pragma once
 
#include <functional>
#include <memory>
#include <utility>
 
namespace uhd { namespace utils {
 
class scope_exit
{
public:
    using uptr      = std::unique_ptr<scope_exit>;
    using exit_cb_t = std::function<void(void)>;
 
    // \param exit_b The function object ("exit callback") that gets executed
    //               in the destructor
    static uptr make(exit_cb_t&& exit_cb)
    {
        // Note: We can't use make_unique() here because it requires the
        // constructor to be public.
        return uptr(new scope_exit(std::forward<exit_cb_t>(exit_cb)));
    }
 
    ~scope_exit()
    {
        _exit_cb();
    }
 
private:
    scope_exit(exit_cb_t&& exit_cb) : _exit_cb(std::forward<exit_cb_t>(exit_cb))
    {
        // nop
    }
 
    exit_cb_t _exit_cb;
};
 
}} // namespace uhd::utils