security/sandbox/chromium/base/threading/thread_restrictions.cc@925c144e1f1f (annotated)
security/sandbox/chromium/base/threading/thread_restrictions.cc
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
| michael@0 | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "base/threading/thread_restrictions.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #if ENABLE_THREAD_RESTRICTIONS |
| michael@0 | 8 | |
| michael@0 | 9 | #include "base/lazy_instance.h" |
| michael@0 | 10 | #include "base/logging.h" |
| michael@0 | 11 | #include "base/threading/thread_local.h" |
| michael@0 | 12 | |
| michael@0 | 13 | namespace base { |
| michael@0 | 14 | |
| michael@0 | 15 | namespace { |
| michael@0 | 16 | |
| michael@0 | 17 | LazyInstance<ThreadLocalBoolean>::Leaky |
| michael@0 | 18 | g_io_disallowed = LAZY_INSTANCE_INITIALIZER; |
| michael@0 | 19 | |
| michael@0 | 20 | LazyInstance<ThreadLocalBoolean>::Leaky |
| michael@0 | 21 | g_singleton_disallowed = LAZY_INSTANCE_INITIALIZER; |
| michael@0 | 22 | |
| michael@0 | 23 | LazyInstance<ThreadLocalBoolean>::Leaky |
| michael@0 | 24 | g_wait_disallowed = LAZY_INSTANCE_INITIALIZER; |
| michael@0 | 25 | |
| michael@0 | 26 | } // anonymous namespace |
| michael@0 | 27 | |
| michael@0 | 28 | // static |
| michael@0 | 29 | bool ThreadRestrictions::SetIOAllowed(bool allowed) { |
| michael@0 | 30 | bool previous_disallowed = g_io_disallowed.Get().Get(); |
| michael@0 | 31 | g_io_disallowed.Get().Set(!allowed); |
| michael@0 | 32 | return !previous_disallowed; |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | // static |
| michael@0 | 36 | void ThreadRestrictions::AssertIOAllowed() { |
| michael@0 | 37 | if (g_io_disallowed.Get().Get()) { |
| michael@0 | 38 | LOG(FATAL) << |
| michael@0 | 39 | "Function marked as IO-only was called from a thread that " |
| michael@0 | 40 | "disallows IO! If this thread really should be allowed to " |
| michael@0 | 41 | "make IO calls, adjust the call to " |
| michael@0 | 42 | "base::ThreadRestrictions::SetIOAllowed() in this thread's " |
| michael@0 | 43 | "startup."; |
| michael@0 | 44 | } |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | // static |
| michael@0 | 48 | bool ThreadRestrictions::SetSingletonAllowed(bool allowed) { |
| michael@0 | 49 | bool previous_disallowed = g_singleton_disallowed.Get().Get(); |
| michael@0 | 50 | g_singleton_disallowed.Get().Set(!allowed); |
| michael@0 | 51 | return !previous_disallowed; |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | // static |
| michael@0 | 55 | void ThreadRestrictions::AssertSingletonAllowed() { |
| michael@0 | 56 | if (g_singleton_disallowed.Get().Get()) { |
| michael@0 | 57 | LOG(FATAL) << "LazyInstance/Singleton is not allowed to be used on this " |
| michael@0 | 58 | << "thread. Most likely it's because this thread is not " |
| michael@0 | 59 | << "joinable, so AtExitManager may have deleted the object " |
| michael@0 | 60 | << "on shutdown, leading to a potential shutdown crash."; |
| michael@0 | 61 | } |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | // static |
| michael@0 | 65 | void ThreadRestrictions::DisallowWaiting() { |
| michael@0 | 66 | g_wait_disallowed.Get().Set(true); |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | // static |
| michael@0 | 70 | void ThreadRestrictions::AssertWaitAllowed() { |
| michael@0 | 71 | if (g_wait_disallowed.Get().Get()) { |
| michael@0 | 72 | LOG(FATAL) << "Waiting is not allowed to be used on this thread to prevent" |
| michael@0 | 73 | << "jank and deadlock."; |
| michael@0 | 74 | } |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | bool ThreadRestrictions::SetWaitAllowed(bool allowed) { |
| michael@0 | 78 | bool previous_disallowed = g_wait_disallowed.Get().Get(); |
| michael@0 | 79 | g_wait_disallowed.Get().Set(!allowed); |
| michael@0 | 80 | return !previous_disallowed; |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | } // namespace base |
| michael@0 | 84 | |
| michael@0 | 85 | #endif // ENABLE_THREAD_RESTRICTIONS |
