1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/base/scoped_nsobject.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +// Copyright (c) 2009 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 +#ifndef BASE_SCOPED_NSOBJECT_H_
1.9 +#define BASE_SCOPED_NSOBJECT_H_
1.10 +
1.11 +#import <Foundation/Foundation.h>
1.12 +#include "base/basictypes.h"
1.13 +
1.14 +// scoped_nsobject<> is patterned after scoped_ptr<>, but maintains ownership
1.15 +// of an NSObject subclass object. Style deviations here are solely for
1.16 +// compatibility with scoped_ptr<>'s interface, with which everyone is already
1.17 +// familiar.
1.18 +//
1.19 +// When scoped_nsobject<> takes ownership of an object (in the constructor or
1.20 +// in reset()), it takes over the caller's existing ownership claim. The
1.21 +// caller must own the object it gives to scoped_nsobject<>, and relinquishes
1.22 +// an ownership claim to that object. scoped_nsobject<> does not call
1.23 +// -retain.
1.24 +template<typename NST>
1.25 +class scoped_nsobject {
1.26 + public:
1.27 + typedef NST* element_type;
1.28 +
1.29 + explicit scoped_nsobject(NST* object = nil)
1.30 + : object_(object) {
1.31 + }
1.32 +
1.33 + ~scoped_nsobject() {
1.34 + [object_ release];
1.35 + }
1.36 +
1.37 + void reset(NST* object = nil) {
1.38 + [object_ release];
1.39 + object_ = object;
1.40 + }
1.41 +
1.42 + bool operator==(NST* that) const {
1.43 + return object_ == that;
1.44 + }
1.45 +
1.46 + bool operator!=(NST* that) const {
1.47 + return object_ != that;
1.48 + }
1.49 +
1.50 + operator NST*() const {
1.51 + return object_;
1.52 + }
1.53 +
1.54 + NST* get() const {
1.55 + return object_;
1.56 + }
1.57 +
1.58 + void swap(scoped_nsobject& that) {
1.59 + NST* temp = that.object_;
1.60 + that.object_ = object_;
1.61 + object_ = temp;
1.62 + }
1.63 +
1.64 + // scoped_nsobject<>::release() is like scoped_ptr<>::release. It is NOT
1.65 + // a wrapper for [object_ release]. To force a scoped_nsobject<> object to
1.66 + // call [object_ release], use scoped_nsobject<>::reset().
1.67 + NST* release() {
1.68 + NST* temp = object_;
1.69 + object_ = nil;
1.70 + return temp;
1.71 + }
1.72 +
1.73 + private:
1.74 + NST* object_;
1.75 +
1.76 + DISALLOW_COPY_AND_ASSIGN(scoped_nsobject);
1.77 +};
1.78 +
1.79 +#endif // BASE_SCOPED_NSOBJECT_H_
