forked from etc/pineapple-src
56 lines
1.4 KiB
C++
Executable file
56 lines
1.4 KiB
C++
Executable file
// SPDX-FileCopyrightText: 2014 Citra Emulator Project
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#pragma once
|
|
|
|
#include <utility>
|
|
#include "common/common_funcs.h"
|
|
|
|
namespace detail {
|
|
template <typename Func>
|
|
struct ScopeExitHelper {
|
|
explicit ScopeExitHelper(Func&& func_) : func(std::move(func_)) {}
|
|
~ScopeExitHelper() {
|
|
if (active) {
|
|
func();
|
|
}
|
|
}
|
|
|
|
void Cancel() {
|
|
active = false;
|
|
}
|
|
|
|
Func func;
|
|
bool active{true};
|
|
};
|
|
|
|
template <typename Func>
|
|
ScopeExitHelper<Func> ScopeExit(Func&& func) {
|
|
return ScopeExitHelper<Func>(std::forward<Func>(func));
|
|
}
|
|
} // namespace detail
|
|
|
|
/**
|
|
* This macro allows you to conveniently specify a block of code that will run on scope exit. Handy
|
|
* for doing ad-hoc clean-up tasks in a function with multiple returns.
|
|
*
|
|
* Example usage:
|
|
* \code
|
|
* const int saved_val = g_foo;
|
|
* g_foo = 55;
|
|
* SCOPE_EXIT({ g_foo = saved_val; });
|
|
*
|
|
* if (Bar()) {
|
|
* return 0;
|
|
* } else {
|
|
* return 20;
|
|
* }
|
|
* \endcode
|
|
*/
|
|
#define SCOPE_EXIT(body) auto CONCAT2(scope_exit_helper_, __LINE__) = detail::ScopeExit([&]() body)
|
|
|
|
/**
|
|
* This macro is similar to SCOPE_EXIT, except the object is caller managed. This is intended to be
|
|
* used when the caller might want to cancel the ScopeExit.
|
|
*/
|
|
#define SCOPE_GUARD(body) detail::ScopeExit([&]() body)
|