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Side by Side Diff: base/bind_helpers.h

Issue 23514018: Add Reset to ScopedClosureRunner. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: android fix 2 Created 7 years, 3 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // This defines a set of argument wrappers and related factory methods that 5 // This defines a set of argument wrappers and related factory methods that
6 // can be used specify the refcounting and reference semantics of arguments 6 // can be used specify the refcounting and reference semantics of arguments
7 // that are bound by the Bind() function in base/bind.h. 7 // that are bound by the Bind() function in base/bind.h.
8 // 8 //
9 // It also defines a set of simple functions and utilities that people want 9 // It also defines a set of simple functions and utilities that people want
10 // when using Callback<> and Bind(). 10 // when using Callback<> and Bind().
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132 // or if it is posted to a MessageLoopProxy. 132 // or if it is posted to a MessageLoopProxy.
133 // 133 //
134 // 134 //
135 // SIMPLE FUNCTIONS AND UTILITIES. 135 // SIMPLE FUNCTIONS AND UTILITIES.
136 // 136 //
137 // DoNothing() - Useful for creating a Closure that does nothing when called. 137 // DoNothing() - Useful for creating a Closure that does nothing when called.
138 // DeletePointer<T>() - Useful for creating a Closure that will delete a 138 // DeletePointer<T>() - Useful for creating a Closure that will delete a
139 // pointer when invoked. Only use this when necessary. 139 // pointer when invoked. Only use this when necessary.
140 // In most cases MessageLoop::DeleteSoon() is a better 140 // In most cases MessageLoop::DeleteSoon() is a better
141 // fit. 141 // fit.
142 // ScopedClosureRunner - Scoper object that runs the wrapped closure when it
143 // goes out of scope. It's conceptually similar to
144 // scoped_ptr<> but calls Run() instead of deleting
145 // the pointer.
146 142
147 #ifndef BASE_BIND_HELPERS_H_ 143 #ifndef BASE_BIND_HELPERS_H_
148 #define BASE_BIND_HELPERS_H_ 144 #define BASE_BIND_HELPERS_H_
149 145
150 #include "base/basictypes.h" 146 #include "base/basictypes.h"
151 #include "base/callback.h" 147 #include "base/callback.h"
152 #include "base/memory/weak_ptr.h" 148 #include "base/memory/weak_ptr.h"
153 #include "base/template_util.h" 149 #include "base/template_util.h"
154 150
155 namespace base { 151 namespace base {
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536 return internal::IgnoreResultHelper<Callback<T> >(data); 532 return internal::IgnoreResultHelper<Callback<T> >(data);
537 } 533 }
538 534
539 BASE_EXPORT void DoNothing(); 535 BASE_EXPORT void DoNothing();
540 536
541 template<typename T> 537 template<typename T>
542 void DeletePointer(T* obj) { 538 void DeletePointer(T* obj) {
543 delete obj; 539 delete obj;
544 } 540 }
545 541
546 // ScopedClosureRunner is akin to scoped_ptr for Closures. It ensures that the
547 // Closure is executed and deleted no matter how the current scope exits.
548 class BASE_EXPORT ScopedClosureRunner {
549 public:
550 explicit ScopedClosureRunner(const Closure& closure);
551 ~ScopedClosureRunner();
552
553 Closure Release();
554
555 private:
556 Closure closure_;
557
558 DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedClosureRunner);
559 };
560
561 } // namespace base 542 } // namespace base
562 543
563 #endif // BASE_BIND_HELPERS_H_ 544 #endif // BASE_BIND_HELPERS_H_
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