| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef MOZC_BASE_SCOPED_HANDLE_H_ |
| #define MOZC_BASE_SCOPED_HANDLE_H_ |
| |
| #ifdef OS_WIN |
| // Example: |
| // ScopedHandle hfile(CreateFile(...)); |
| // if (!hfile.get()) |
| // ...process error |
| // ReadFile(hfile.get(), ...); |
| namespace mozc { |
| |
| class ScopedHandle { |
| public: |
| // In order not to depend on <Windows.h> from this header, here we |
| // assume HANDLE type is a synonym of void *. |
| typedef void *Win32Handle; |
| |
| // Initializes with NULL. |
| ScopedHandle(); |
| |
| // Initializes with taking ownership of |handle|. |
| // Covert: If |handle| is INVALID_HANDLE_VALUE, this wrapper treat |
| // it as NULL. |
| explicit ScopedHandle(Win32Handle handle); |
| |
| // Call ::CloseHandle API against the current object (if any). |
| ~ScopedHandle(); |
| |
| // Call ::CloseHandle API against the current object (if any), then |
| // takes ownership of |handle| |
| void reset(Win32Handle handle); |
| |
| // Returns the object pointer without transferring the ownership. |
| Win32Handle get() const; |
| |
| // Transfers ownership away from this object. |
| Win32Handle take(); |
| |
| private: |
| void Close(); |
| |
| Win32Handle handle_; |
| }; |
| |
| } // namespace mozc |
| |
| #endif // OS_WIN |
| #endif // MOZC_BASE_SCOPED_HANDLE_H_ |