| // Copyright 2008, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "base/ref_counted.h" |
| |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| namespace subtle { |
| |
| RefCountedBase::RefCountedBase() : ref_count_(0) { |
| #ifndef NDEBUG |
| in_dtor_ = false; |
| #endif |
| } |
| |
| RefCountedBase::~RefCountedBase() { |
| #ifndef NDEBUG |
| DCHECK(in_dtor_) << "RefCounted object deleted without calling Release()"; |
| #endif |
| } |
| |
| void RefCountedBase::AddRef() { |
| #ifndef NDEBUG |
| DCHECK(!in_dtor_); |
| #endif |
| ++ref_count_; |
| } |
| |
| bool RefCountedBase::Release() { |
| #ifndef NDEBUG |
| DCHECK(!in_dtor_); |
| #endif |
| if (--ref_count_ == 0) { |
| #ifndef NDEBUG |
| in_dtor_ = true; |
| #endif |
| return true; |
| } |
| return false; |
| } |
| |
| RefCountedThreadSafeBase::RefCountedThreadSafeBase() : ref_count_(0) { |
| #ifndef NDEBUG |
| in_dtor_ = false; |
| #endif |
| } |
| |
| RefCountedThreadSafeBase::~RefCountedThreadSafeBase() { |
| #ifndef NDEBUG |
| DCHECK(in_dtor_) << "RefCountedThreadSafe object deleted without " |
| "calling Release()"; |
| #endif |
| } |
| |
| void RefCountedThreadSafeBase::AddRef() { |
| #ifndef NDEBUG |
| DCHECK(!in_dtor_); |
| #endif |
| AtomicRefCountInc(&ref_count_); |
| } |
| |
| bool RefCountedThreadSafeBase::Release() { |
| #ifndef NDEBUG |
| DCHECK(!in_dtor_); |
| DCHECK(!AtomicRefCountIsZero(&ref_count_)); |
| #endif |
| if (!AtomicRefCountDec(&ref_count_)) { |
| #ifndef NDEBUG |
| in_dtor_ = true; |
| #endif |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace subtle |
| |
| } // namespace base |