| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #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, void* param) { |
| if (!g_top_manager) { |
| NOTREACHED() << "Tried to RegisterCallback without an AtExitManager"; |
| return; |
| } |
| |
| DCHECK(func); |
| |
| AutoLock lock(g_top_manager->lock_); |
| g_top_manager->stack_.push(CallbackAndParam(func, param)); |
| } |
| |
| // 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()) { |
| CallbackAndParam callback_and_param = g_top_manager->stack_.top(); |
| g_top_manager->stack_.pop(); |
| |
| callback_and_param.func_(callback_and_param.param_); |
| } |
| } |
| |
| } // namespace base |