| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkScopeExit_DEFINED |
| #define SkScopeExit_DEFINED |
| |
| #include "SkTypes.h" |
| #include <functional> |
| |
| /** SkScopeExit calls a std:::function<void()> in its destructor. */ |
| class SkScopeExit { |
| public: |
| SkScopeExit(std::function<void()> f) : fFn(std::move(f)) {} |
| SkScopeExit(SkScopeExit&& that) : fFn(std::move(that.fFn)) {} |
| |
| ~SkScopeExit() { |
| if (fFn) { |
| fFn(); |
| } |
| } |
| |
| SkScopeExit& operator=(SkScopeExit&& that) { |
| fFn = std::move(that.fFn); |
| return *this; |
| } |
| |
| private: |
| std::function<void()> fFn; |
| |
| SkScopeExit( const SkScopeExit& ) = delete; |
| SkScopeExit& operator=(const SkScopeExit& ) = delete; |
| }; |
| |
| /** |
| * SK_AT_SCOPE_EXIT(stmt) evaluates stmt when the current scope ends. |
| * |
| * E.g. |
| * { |
| * int x = 5; |
| * { |
| * SK_AT_SCOPE_EXIT(x--); |
| * SkASSERT(x == 5); |
| * } |
| * SkASSERT(x == 4); |
| * } |
| */ |
| #define SK_AT_SCOPE_EXIT(stmt) \ |
| SkScopeExit SK_MACRO_APPEND_LINE(at_scope_exit_)([&]() { stmt; }) |
| |
| #endif // SkScopeExit_DEFINED |