The Tor Browser: security/sandbox/chromium/base/memory/ref

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2011 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.

     5 #include "base/memory/ref_counted.h"

     7 #include "base/logging.h"

     8 #include "base/threading/thread_collision_warner.h"

    10 namespace base {

    12 namespace subtle {

    14 RefCountedBase::RefCountedBase()

    15     : ref_count_(0)

    16 #ifndef NDEBUG

    17     , in_dtor_(false)

    18 #endif

    19     {

    20 }

    22 RefCountedBase::~RefCountedBase() {

    23 #ifndef NDEBUG

    24   DCHECK(in_dtor_) << "RefCounted object deleted without calling Release()";

    25 #endif

    26 }

    28 void RefCountedBase::AddRef() const {

    29   // TODO(maruel): Add back once it doesn't assert 500 times/sec.

    30   // Current thread books the critical section "AddRelease" without release it.

    31   // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);

    32 #ifndef NDEBUG

    33   DCHECK(!in_dtor_);

    34 #endif

    35   ++ref_count_;

    36 }

    38 bool RefCountedBase::Release() const {

    39   // TODO(maruel): Add back once it doesn't assert 500 times/sec.

    40   // Current thread books the critical section "AddRelease" without release it.

    41   // DFAKE_SCOPED_LOCK_THREAD_LOCKED(add_release_);

    42 #ifndef NDEBUG

    43   DCHECK(!in_dtor_);

    44 #endif

    45   if (--ref_count_ == 0) {

    46 #ifndef NDEBUG

    47     in_dtor_ = true;

    48 #endif

    49     return true;

    50   }

    51   return false;

    52 }

    54 bool RefCountedThreadSafeBase::HasOneRef() const {

    55   return AtomicRefCountIsOne(

    56       &const_cast<RefCountedThreadSafeBase*>(this)->ref_count_);

    57 }

    59 RefCountedThreadSafeBase::RefCountedThreadSafeBase() : ref_count_(0) {

    60 #ifndef NDEBUG

    61   in_dtor_ = false;

    62 #endif

    63 }

    65 RefCountedThreadSafeBase::~RefCountedThreadSafeBase() {

    66 #ifndef NDEBUG

    67   DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without "

    68                       "calling Release()";

    69 #endif

    70 }

    72 void RefCountedThreadSafeBase::AddRef() const {

    73 #ifndef NDEBUG

    74   DCHECK(!in_dtor_);

    75 #endif

    76   AtomicRefCountInc(&ref_count_);

    77 }

    79 bool RefCountedThreadSafeBase::Release() const {

    80 #ifndef NDEBUG

    81   DCHECK(!in_dtor_);

    82   DCHECK(!AtomicRefCountIsZero(&ref_count_));

    83 #endif

    84   if (!AtomicRefCountDec(&ref_count_)) {

    85 #ifndef NDEBUG

    86     in_dtor_ = true;

    87 #endif

    88     return true;

    89   }

    90   return false;

    91 }

    93 }  // namespace subtle

    95 }  // namespace base

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