| // Copyright 2010-2015, 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. |
| |
| #include "base/scoped_handle.h" |
| |
| #ifdef OS_WIN |
| #include <windows.h> |
| |
| namespace mozc { |
| |
| ScopedHandle::ScopedHandle() |
| : handle_(NULL) {} |
| |
| ScopedHandle::ScopedHandle(Win32Handle handle) |
| : handle_(NULL) { |
| reset(handle); |
| } |
| |
| ScopedHandle::~ScopedHandle() { |
| Close(); |
| } |
| |
| void ScopedHandle::reset(Win32Handle handle) { |
| Close(); |
| // Comment by yukawa: |
| // FYI, ATL has similar class called CHandle and its document |
| // says that we cannot |
| // assume INVALID_HANDLE_VALUE is the only invalid handle. |
| // See the note section of this document. |
| // http://msdn.microsoft.com/en-us/library/5fc6ft2t.aspx |
| // .NET approach is also informative. |
| // .NET has similar handle wrapper called SafeHandle, |
| // which allows us to override |
| // the condition of invalid handle. |
| // http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.safehandle.isinvalid.aspx |
| // They has pre-defined special classes SafeHandleMinusOneIsInvalid and |
| // SafeHandleZeroOrMinusOneIsInvalid. |
| // http://msdn.microsoft.com/en-us/library/microsoft.win32.safehandles.safehandleminusoneisinvalid.aspx |
| // http://msdn.microsoft.com/en-us/library/microsoft.win32.safehandles.safehandlezeroorminusoneisinvalid.aspx |
| if (handle != INVALID_HANDLE_VALUE) { |
| handle_ = handle; |
| } |
| } |
| |
| ScopedHandle::Win32Handle ScopedHandle::get() const { |
| return handle_; |
| } |
| |
| // transfers ownership away from this object |
| ScopedHandle::Win32Handle ScopedHandle::take() { |
| HANDLE handle = handle_; |
| handle_ = NULL; |
| return handle; |
| } |
| |
| void ScopedHandle::Close() { |
| if (handle_ != NULL) { |
| ::CloseHandle(handle_); |
| handle_ = NULL; |
| } |
| } |
| |
| } // namespace mozc |
| |
| #endif // OS_WIN |