| // Copyright 2008, 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/at_exit.h" |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| // Keep a stack of registered AtExitManagers. We always operate on the most |
| // recent, and we should never have more than one outside of testing, when we |
| // use the shadow version of the constructor. We don't protect this for |
| // thread-safe access, since it will only be modified in testing. |
| static AtExitManager* g_top_manager = NULL; |
| |
| AtExitManager::AtExitManager() : next_manager_(NULL) { |
| DCHECK(!g_top_manager); |
| g_top_manager = this; |
| } |
| |
| AtExitManager::AtExitManager(bool shadow) : next_manager_(g_top_manager) { |
| DCHECK(shadow || !g_top_manager); |
| g_top_manager = this; |
| } |
| |
| AtExitManager::~AtExitManager() { |
| if (!g_top_manager) { |
| NOTREACHED() << "Tried to ~AtExitManager without an AtExitManager"; |
| return; |
| } |
| DCHECK(g_top_manager == this); |
| |
| ProcessCallbacksNow(); |
| g_top_manager = next_manager_; |
| } |
| |
| // static |
| void AtExitManager::RegisterCallback(AtExitCallbackType func) { |
| if (!g_top_manager) { |
| NOTREACHED() << "Tried to RegisterCallback without an AtExitManager"; |
| return; |
| } |
| |
| AutoLock lock(g_top_manager->lock_); |
| g_top_manager->stack_.push(func); |
| } |
| |
| // static |
| void AtExitManager::ProcessCallbacksNow() { |
| if (!g_top_manager) { |
| NOTREACHED() << "Tried to ProcessCallbacksNow without an AtExitManager"; |
| return; |
| } |
| |
| AutoLock lock(g_top_manager->lock_); |
| |
| while (!g_top_manager->stack_.empty()) { |
| AtExitCallbackType func = g_top_manager->stack_.top(); |
| g_top_manager->stack_.pop(); |
| if (func) |
| func(); |
| } |
| } |
| |
| } // namespace base |