1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/base/at_exit.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,72 @@
1.4 +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "base/at_exit.h"
1.9 +#include "base/logging.h"
1.10 +
1.11 +namespace base {
1.12 +
1.13 +// Keep a stack of registered AtExitManagers. We always operate on the most
1.14 +// recent, and we should never have more than one outside of testing, when we
1.15 +// use the shadow version of the constructor. We don't protect this for
1.16 +// thread-safe access, since it will only be modified in testing.
1.17 +static AtExitManager* g_top_manager = NULL;
1.18 +
1.19 +AtExitManager::AtExitManager() : next_manager_(NULL) {
1.20 + DCHECK(!g_top_manager);
1.21 + g_top_manager = this;
1.22 +}
1.23 +
1.24 +AtExitManager::AtExitManager(bool shadow) : next_manager_(g_top_manager) {
1.25 + DCHECK(shadow || !g_top_manager);
1.26 + g_top_manager = this;
1.27 +}
1.28 +
1.29 +AtExitManager::~AtExitManager() {
1.30 + if (!g_top_manager) {
1.31 + NOTREACHED() << "Tried to ~AtExitManager without an AtExitManager";
1.32 + return;
1.33 + }
1.34 + DCHECK(g_top_manager == this);
1.35 +
1.36 + ProcessCallbacksNow();
1.37 + g_top_manager = next_manager_;
1.38 +}
1.39 +
1.40 +// static
1.41 +void AtExitManager::RegisterCallback(AtExitCallbackType func, void* param) {
1.42 + if (!g_top_manager) {
1.43 + NOTREACHED() << "Tried to RegisterCallback without an AtExitManager";
1.44 + return;
1.45 + }
1.46 +
1.47 + DCHECK(func);
1.48 +
1.49 + AutoLock lock(g_top_manager->lock_);
1.50 + g_top_manager->stack_.push(CallbackAndParam(func, param));
1.51 +}
1.52 +
1.53 +// static
1.54 +void AtExitManager::ProcessCallbacksNow() {
1.55 + if (!g_top_manager) {
1.56 + NOTREACHED() << "Tried to ProcessCallbacksNow without an AtExitManager";
1.57 + return;
1.58 + }
1.59 +
1.60 + AutoLock lock(g_top_manager->lock_);
1.61 +
1.62 + while (!g_top_manager->stack_.empty()) {
1.63 + CallbackAndParam callback_and_param = g_top_manager->stack_.top();
1.64 + g_top_manager->stack_.pop();
1.65 +
1.66 + callback_and_param.func_(callback_and_param.param_);
1.67 + }
1.68 +}
1.69 +
1.70 +// static
1.71 +bool AtExitManager::AlreadyRegistered() {
1.72 + return !!g_top_manager;
1.73 +}
1.74 +
1.75 +} // namespace base
