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comparison: ipc/chromium/src/base/at_exit.cc
ipc/chromium/src/base/at_exit.cc
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:5a6a14609a88 |
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/at_exit.h" | |
| 6 #include "base/logging.h" | |
| 7 | |
| 8 namespace base { | |
| 9 | |
| 10 // Keep a stack of registered AtExitManagers. We always operate on the most | |
| 11 // recent, and we should never have more than one outside of testing, when we | |
| 12 // use the shadow version of the constructor. We don't protect this for | |
| 13 // thread-safe access, since it will only be modified in testing. | |
| 14 static AtExitManager* g_top_manager = NULL; | |
| 15 | |
| 16 AtExitManager::AtExitManager() : next_manager_(NULL) { | |
| 17 DCHECK(!g_top_manager); | |
| 18 g_top_manager = this; | |
| 19 } | |
| 20 | |
| 21 AtExitManager::AtExitManager(bool shadow) : next_manager_(g_top_manager) { | |
| 22 DCHECK(shadow || !g_top_manager); | |
| 23 g_top_manager = this; | |
| 24 } | |
| 25 | |
| 26 AtExitManager::~AtExitManager() { | |
| 27 if (!g_top_manager) { | |
| 28 NOTREACHED() << "Tried to ~AtExitManager without an AtExitManager"; | |
| 29 return; | |
| 30 } | |
| 31 DCHECK(g_top_manager == this); | |
| 32 | |
| 33 ProcessCallbacksNow(); | |
| 34 g_top_manager = next_manager_; | |
| 35 } | |
| 36 | |
| 37 // static | |
| 38 void AtExitManager::RegisterCallback(AtExitCallbackType func, void* param) { | |
| 39 if (!g_top_manager) { | |
| 40 NOTREACHED() << "Tried to RegisterCallback without an AtExitManager"; | |
| 41 return; | |
| 42 } | |
| 43 | |
| 44 DCHECK(func); | |
| 45 | |
| 46 AutoLock lock(g_top_manager->lock_); | |
| 47 g_top_manager->stack_.push(CallbackAndParam(func, param)); | |
| 48 } | |
| 49 | |
| 50 // static | |
| 51 void AtExitManager::ProcessCallbacksNow() { | |
| 52 if (!g_top_manager) { | |
| 53 NOTREACHED() << "Tried to ProcessCallbacksNow without an AtExitManager"; | |
| 54 return; | |
| 55 } | |
| 56 | |
| 57 AutoLock lock(g_top_manager->lock_); | |
| 58 | |
| 59 while (!g_top_manager->stack_.empty()) { | |
| 60 CallbackAndParam callback_and_param = g_top_manager->stack_.top(); | |
| 61 g_top_manager->stack_.pop(); | |
| 62 | |
| 63 callback_and_param.func_(callback_and_param.param_); | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 // static | |
| 68 bool AtExitManager::AlreadyRegistered() { | |
| 69 return !!g_top_manager; | |
| 70 } | |
| 71 | |
| 72 } // namespace base |
