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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#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)
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