Add SCOPE_EXIT macro to conveniently execute cleanup actions
This commit is contained in:
parent
ed0221552a
commit
04b1f2936c
|
@ -51,6 +51,7 @@ set(HEADERS
|
|||
msg_handler.h
|
||||
platform.h
|
||||
scm_rev.h
|
||||
scope_exit.h
|
||||
string_util.h
|
||||
swap.h
|
||||
symbols.h
|
||||
|
|
|
@ -0,0 +1,37 @@
|
|||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2+
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
namespace detail {
|
||||
template <typename Func>
|
||||
struct ScopeExitHelper {
|
||||
explicit ScopeExitHelper(Func&& func) : func(std::move(func)) {}
|
||||
~ScopeExitHelper() { func(); }
|
||||
|
||||
Func func;
|
||||
};
|
||||
|
||||
template <typename Func>
|
||||
ScopeExitHelper<Func> ScopeExit(Func&& func) { return ScopeExitHelper<Func>(std::move(func)); }
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 scope_exit_helper_##__LINE__ = detail::ScopeExit([&]() body)
|
Reference in New Issue