| // 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. |
| |
| #include "base/singleton.h" |
| |
| #ifdef OS_WIN |
| #include <Windows.h> |
| #else |
| #include <cstdlib> |
| #endif // OS_WIN |
| |
| #include "base/mutex.h" |
| |
| namespace mozc { |
| namespace { |
| |
| const size_t kMaxFinalizersSize = 256; |
| size_t g_finalizers_size = 0; |
| |
| SingletonFinalizer::FinalizerFunc g_finalizers[kMaxFinalizersSize]; |
| |
| // We can't use CHECK logic for Singleton because CHECK (and LOG) |
| // obtains the singleton LogStream by calling Singleton::get(). If |
| // something goes wrong during Singleton::get of the LogStream, it |
| // recursively calls Singleton::get again to report errors, which |
| // leads an inifinite wait loop because the first Singleton::get locks |
| // everything. |
| // ExitWithError() exits the program without reporting errors, which |
| // is not good but better than an inifinite loop. |
| void ExitWithError() { |
| // This logic is copied from logging.h |
| #ifdef OS_WIN |
| ::RaiseException(::GetLastError(), |
| EXCEPTION_NONCONTINUABLE, |
| NULL, NULL); |
| #else |
| exit(-1); |
| #endif |
| } |
| } // namespace |
| |
| void SingletonFinalizer::AddFinalizer(FinalizerFunc func) { |
| // When g_finalizers_size is equal to kMaxFinalizersSize, |
| // SingletonFinalizer::Finalize is called already. |
| if (g_finalizers_size >= kMaxFinalizersSize) { |
| ExitWithError(); |
| } |
| // This part is not thread safe. |
| // When two different classes are instantiated at the same time, |
| // this code will raise an exception. |
| g_finalizers[g_finalizers_size++] = func; |
| } |
| |
| void SingletonFinalizer::Finalize() { |
| // This part is not thread safe. |
| // When two different classes are instantiated at the same time, |
| // this code will raise an exception. |
| for (int i = static_cast<int>(g_finalizers_size) - 1; i >= 0; --i) { |
| (*g_finalizers[i])(); |
| } |
| g_finalizers_size = 0; |
| } |
| } // mozc |