| // 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. |
| |
| #ifndef BASE_SCOPED_CFTYPEREF_H__ |
| #define BASE_SCOPED_CFTYPEREF_H__ |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| // scoped_cftyperef<> is patterned after scoped_ptr<>, but maintains ownership |
| // of a CoreFoundation object: any object that can be represented as a |
| // CFTypeRef. Style deviations here are solely for compatibility with |
| // scoped_ptr<>'s interface, with which everyone is already familiar. |
| template<typename CFT> |
| class scoped_cftyperef { |
| public: |
| typedef CFT element_type; |
| |
| explicit scoped_cftyperef(CFT object = NULL) |
| : object_(object) { |
| } |
| |
| ~scoped_cftyperef() { |
| if (object_) |
| CFRelease(object_); |
| } |
| |
| void reset(CFT object = NULL) { |
| if (object_ && object_ != object) { |
| CFRelease(object_); |
| object_ = object; |
| } |
| } |
| |
| bool operator==(CFT that) const { |
| return object_ == that; |
| } |
| |
| bool operator!=(CFT that) const { |
| return object_ != that; |
| } |
| |
| operator CFT() const { |
| return object_; |
| } |
| |
| CFT get() const { |
| return object_; |
| } |
| |
| void swap(scoped_cftyperef& that) { |
| CFT temp = that.object_; |
| that.object_ = object_; |
| object_ = temp; |
| } |
| |
| // scoped_cftyperef<>::release() is like scoped_ptr<>::release. It is NOT |
| // a wrapper for CFRelease(). To force a scoped_cftyperef<> object to call |
| // CFRelease(), use scoped_cftyperef<>::reset(). |
| CFT release() { |
| CFT temp = object_; |
| object_ = NULL; |
| return temp; |
| } |
| |
| private: |
| CFT object_; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(scoped_cftyperef); |
| }; |
| |
| #endif // BASE_SCOPED_CFTYPEREF_H__ |