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| author | darkf <lw9k123@gmail.com> | 2014-12-29 19:47:41 -0800 |
|---|---|---|
| committer | darkf <lw9k123@gmail.com> | 2014-12-29 19:47:41 -0800 |
| commit | 8ba9ac0f74abb0408a26207a76a0c1808bad8de0 (patch) | |
| tree | f1c7c3393fa726435b5b90bf335567c93e528ef1 /src/common/scope_exit.h | |
| parent | a19354acedbfeafd28219c48a1ec32f76dd17a54 (diff) | |
| parent | 3d14eb285382740b144e5b047cb2ad072f6129ea (diff) | |
Fix merge conflicts
Diffstat (limited to 'src/common/scope_exit.h')
| -rw-r--r-- | src/common/scope_exit.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/common/scope_exit.h b/src/common/scope_exit.h new file mode 100644 index 0000000000..263beaf0ef --- /dev/null +++ b/src/common/scope_exit.h @@ -0,0 +1,37 @@ +// Copyright 2014 Citra Emulator Project +// Licensed under GPLv2 or any later version +// 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) |