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| author | bunnei <bunneidev@gmail.com> | 2014-12-12 23:20:01 -0500 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2014-12-12 23:20:01 -0500 |
| commit | af1cd769e7b407af71496e788e218add31f8b2b0 (patch) | |
| tree | 1e3fd71256c04a15970b09abd3f7280f8b1ff678 /src/common/scope_exit.h | |
| parent | a6791e4fc73dda4853c8363d8ecf5094dbedd0ab (diff) | |
| parent | 4d2a6f8b9b3eeb85574a5e4f93422ffd4feebcd3 (diff) | |
Merge pull request #258 from yuriks/log-ng
New logging system
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..1d3e59319b --- /dev/null +++ b/src/common/scope_exit.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) |