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authorwolfbeast <mcwerewolf@gmail.com>2018-05-14 10:50:01 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-05-14 10:50:01 +0200
commite9dd029f5d00590e1a53e63b0ab805110a10b54c (patch)
tree1126ca5dda925a62be3dc12c99c90e953d08afcf /security/sandbox/chromium/base/threading/thread_collision_warner.cc
parent9d6a7ae25d7f5da855a8f8df884de483b4e2a538 (diff)
parent36b8fd734f590eb726ca2e50f8d1ff9cc968b8e1 (diff)
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Merge branch 'master' into Basilisk-release
Diffstat (limited to 'security/sandbox/chromium/base/threading/thread_collision_warner.cc')
-rw-r--r--security/sandbox/chromium/base/threading/thread_collision_warner.cc64
1 files changed, 0 insertions, 64 deletions
diff --git a/security/sandbox/chromium/base/threading/thread_collision_warner.cc b/security/sandbox/chromium/base/threading/thread_collision_warner.cc
deleted file mode 100644
index 547e11ca6..000000000
--- a/security/sandbox/chromium/base/threading/thread_collision_warner.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright (c) 2010 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/threading/thread_collision_warner.h"
-
-#include "base/logging.h"
-#include "base/threading/platform_thread.h"
-
-namespace base {
-
-void DCheckAsserter::warn() {
- NOTREACHED() << "Thread Collision";
-}
-
-static subtle::Atomic32 CurrentThread() {
- const PlatformThreadId current_thread_id = PlatformThread::CurrentId();
- // We need to get the thread id into an atomic data type. This might be a
- // truncating conversion, but any loss-of-information just increases the
- // chance of a fault negative, not a false positive.
- const subtle::Atomic32 atomic_thread_id =
- static_cast<subtle::Atomic32>(current_thread_id);
-
- return atomic_thread_id;
-}
-
-void ThreadCollisionWarner::EnterSelf() {
- // If the active thread is 0 then I'll write the current thread ID
- // if two or more threads arrive here only one will succeed to
- // write on valid_thread_id_ the current thread ID.
- subtle::Atomic32 current_thread_id = CurrentThread();
-
- int previous_value = subtle::NoBarrier_CompareAndSwap(&valid_thread_id_,
- 0,
- current_thread_id);
- if (previous_value != 0 && previous_value != current_thread_id) {
- // gotcha! a thread is trying to use the same class and that is
- // not current thread.
- asserter_->warn();
- }
-
- subtle::NoBarrier_AtomicIncrement(&counter_, 1);
-}
-
-void ThreadCollisionWarner::Enter() {
- subtle::Atomic32 current_thread_id = CurrentThread();
-
- if (subtle::NoBarrier_CompareAndSwap(&valid_thread_id_,
- 0,
- current_thread_id) != 0) {
- // gotcha! another thread is trying to use the same class.
- asserter_->warn();
- }
-
- subtle::NoBarrier_AtomicIncrement(&counter_, 1);
-}
-
-void ThreadCollisionWarner::Leave() {
- if (subtle::Barrier_AtomicIncrement(&counter_, -1) == 0) {
- subtle::NoBarrier_Store(&valid_thread_id_, 0);
- }
-}
-
-} // namespace base