afb81b8278
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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include <crl/common/crl_common_config.h>
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#include <memory>
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namespace crl {
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template <typename T, typename Enable>
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struct guard_traits;
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template <typename T>
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struct guard_traits<std::weak_ptr<T>, void> {
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static std::weak_ptr<T> create(const std::weak_ptr<T> &value) {
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return value;
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}
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static std::weak_ptr<T> create(std::weak_ptr<T> &&value) {
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return std::move(value);
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}
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static bool check(const std::weak_ptr<T> &guard) {
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return guard.lock() != nullptr;
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}
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};
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template <typename T>
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struct guard_traits<std::shared_ptr<T>, void> {
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static std::weak_ptr<T> create(const std::shared_ptr<T> &value) {
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return value;
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}
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static std::weak_ptr<T> create(std::shared_ptr<T> &&value) {
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return value;
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}
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static bool check(const std::weak_ptr<T> &guard) {
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return guard.lock() != nullptr;
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}
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};
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} // namespace crl
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