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-rw-r--r--ipc/chromium/src/base/at_exit.cc74
1 files changed, 74 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/at_exit.cc b/ipc/chromium/src/base/at_exit.cc
new file mode 100644
index 000000000..9481f36e2
--- /dev/null
+++ b/ipc/chromium/src/base/at_exit.cc
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// 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_);
+ }
+}
+
+// static
+bool AtExitManager::AlreadyRegistered() {
+ return !!g_top_manager;
+}
+
+} // namespace base