1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/memory/ref_counted.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,95 @@
1.4 +// Copyright (c) 2011 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/memory/ref_counted.h"
1.9 +
1.10 +#include "base/logging.h"
1.11 +#include "base/threading/thread_collision_warner.h"
1.12 +
1.13 +namespace base {
1.14 +
1.15 +namespace subtle {
1.16 +
1.17 +RefCountedBase::RefCountedBase()
1.18 + : ref_count_(0)
1.19 +#ifndef NDEBUG
1.20 + , in_dtor_(false)
1.21 +#endif
1.22 + {
1.23 +}
1.24 +
1.25 +RefCountedBase::~RefCountedBase() {
1.26 +#ifndef NDEBUG
1.27 + DCHECK(in_dtor_) << "RefCounted object deleted without calling Release()";
1.28 +#endif
1.29 +}
1.30 +
1.31 +void RefCountedBase::AddRef() const {
1.32 + // TODO(maruel): Add back once it doesn't assert 500 times/sec.
1.33 + // Current thread books the critical section "AddRelease" without release it.
1.34 + // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);
1.35 +#ifndef NDEBUG
1.36 + DCHECK(!in_dtor_);
1.37 +#endif
1.38 + ++ref_count_;
1.39 +}
1.40 +
1.41 +bool RefCountedBase::Release() const {
1.42 + // TODO(maruel): Add back once it doesn't assert 500 times/sec.
1.43 + // Current thread books the critical section "AddRelease" without release it.
1.44 + // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);
1.45 +#ifndef NDEBUG
1.46 + DCHECK(!in_dtor_);
1.47 +#endif
1.48 + if (--ref_count_ == 0) {
1.49 +#ifndef NDEBUG
1.50 + in_dtor_ = true;
1.51 +#endif
1.52 + return true;
1.53 + }
1.54 + return false;
1.55 +}
1.56 +
1.57 +bool RefCountedThreadSafeBase::HasOneRef() const {
1.58 + return AtomicRefCountIsOne(
1.59 + &const_cast<RefCountedThreadSafeBase*>(this)->ref_count_);
1.60 +}
1.61 +
1.62 +RefCountedThreadSafeBase::RefCountedThreadSafeBase() : ref_count_(0) {
1.63 +#ifndef NDEBUG
1.64 + in_dtor_ = false;
1.65 +#endif
1.66 +}
1.67 +
1.68 +RefCountedThreadSafeBase::~RefCountedThreadSafeBase() {
1.69 +#ifndef NDEBUG
1.70 + DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without "
1.71 + "calling Release()";
1.72 +#endif
1.73 +}
1.74 +
1.75 +void RefCountedThreadSafeBase::AddRef() const {
1.76 +#ifndef NDEBUG
1.77 + DCHECK(!in_dtor_);
1.78 +#endif
1.79 + AtomicRefCountInc(&ref_count_);
1.80 +}
1.81 +
1.82 +bool RefCountedThreadSafeBase::Release() const {
1.83 +#ifndef NDEBUG
1.84 + DCHECK(!in_dtor_);
1.85 + DCHECK(!AtomicRefCountIsZero(&ref_count_));
1.86 +#endif
1.87 + if (!AtomicRefCountDec(&ref_count_)) {
1.88 +#ifndef NDEBUG
1.89 + in_dtor_ = true;
1.90 +#endif
1.91 + return true;
1.92 + }
1.93 + return false;
1.94 +}
1.95 +
1.96 +} // namespace subtle
1.97 +
1.98 +} // namespace base
