| // 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. |
| |
| #ifndef MOZC_BASE_PEPPER_SCOPED_OBJ_H_ |
| #define MOZC_BASE_PEPPER_SCOPED_OBJ_H_ |
| |
| #include <ppapi/utility/completion_callback_factory.h> |
| |
| #include "base/port.h" |
| #include "base/unnamed_event.h" |
| |
| namespace mozc { |
| |
| // Some Pepper classes have to be deleted in the NaCl main thread. |
| // scoped_main_thread_destructed_object template guarantees that the object will |
| // be deleted in the NaCl main thread. |
| template <class C> |
| class scoped_main_thread_destructed_object { |
| public: |
| typedef C element_type; |
| |
| explicit scoped_main_thread_destructed_object(C *p = NULL) : ptr_(p) { |
| cc_factory_.Initialize(this); |
| } |
| |
| ~scoped_main_thread_destructed_object() { |
| if (ptr_ != NULL) { |
| DeleteObject(); |
| } |
| } |
| |
| void reset(C *p = NULL) { |
| if (p != ptr_) { |
| if (ptr_ != NULL) { |
| DeleteObject(); |
| } |
| ptr_ = p; |
| } |
| } |
| |
| C &operator*() const { |
| assert(ptr_ != NULL); |
| return *ptr_; |
| } |
| |
| C *operator->() const { |
| assert(ptr_ != NULL); |
| return ptr_; |
| } |
| |
| C *get() const { |
| return ptr_; |
| } |
| |
| private: |
| void DeleteObject() { |
| if (!pp::Module::Get()->core()->IsMainThread()) { |
| pp::Module::Get()->core()->CallOnMainThread( |
| 0, |
| cc_factory_.NewCallback( |
| &scoped_main_thread_destructed_object::DeleteObjectImpl)); |
| } else { |
| DeleteObjectImpl(PP_OK); |
| } |
| event_.Wait(-1); |
| } |
| |
| void DeleteObjectImpl(int32_t result) { |
| delete ptr_; |
| event_.Notify(); |
| } |
| |
| C *ptr_; |
| UnnamedEvent event_; |
| pp::CompletionCallbackFactory<scoped_main_thread_destructed_object> |
| cc_factory_; |
| DISALLOW_COPY_AND_ASSIGN(scoped_main_thread_destructed_object); |
| }; |
| |
| } // namespace mozc |
| |
| #endif // MOZC_BASE_PEPPER_SCOPED_OBJ_H_ |