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Diffstat (limited to 'third_party/chromium/base/memory/scoped_ptr.h')
| -rw-r--r-- | third_party/chromium/base/memory/scoped_ptr.h | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/third_party/chromium/base/memory/scoped_ptr.h b/third_party/chromium/base/memory/scoped_ptr.h deleted file mode 100644 index 2d2c0ec..0000000 --- a/third_party/chromium/base/memory/scoped_ptr.h +++ /dev/null @@ -1,135 +0,0 @@ -// Copyright (c) 2012 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -// Scopers help you manage ownership of a pointer, helping you easily manage a -// pointer within a scope, and automatically destroying the pointer at the end -// of a scope. There are two main classes you will use, which correspond to the -// operators new/delete and new[]/delete[]. -// -// Example usage (scoped_ptr<T>): -// { -// scoped_ptr<Foo> foo(new Foo("wee")); -// } // foo goes out of scope, releasing the pointer with it. -// -// { -// scoped_ptr<Foo> foo; // No pointer managed. -// foo.reset(new Foo("wee")); // Now a pointer is managed. -// foo.reset(new Foo("wee2")); // Foo("wee") was destroyed. -// foo.reset(new Foo("wee3")); // Foo("wee2") was destroyed. -// foo->Method(); // Foo::Method() called. -// foo.get()->Method(); // Foo::Method() called. -// SomeFunc(foo.release()); // SomeFunc takes ownership, foo no longer -// // manages a pointer. -// foo.reset(new Foo("wee4")); // foo manages a pointer again. -// foo.reset(); // Foo("wee4") destroyed, foo no longer -// // manages a pointer. -// } // foo wasn't managing a pointer, so nothing was destroyed. -// -// Example usage (scoped_ptr<T[]>): -// { -// scoped_ptr<Foo[]> foo(new Foo[100]); -// foo.get()->Method(); // Foo::Method on the 0th element. -// foo[10].Method(); // Foo::Method on the 10th element. -// } -// -// Scopers are testable as booleans: -// { -// scoped_ptr<Foo> foo; -// if (!foo) -// foo.reset(new Foo()); -// if (foo) -// LOG(INFO) << "This code is reached." -// } -// -// These scopers also implement part of the functionality of C++11 unique_ptr -// in that they are "movable but not copyable." You can use the scopers in -// the parameter and return types of functions to signify ownership transfer -// in to and out of a function. When calling a function that has a scoper -// as the argument type, it must be called with an rvalue of a scoper, which -// can be created by using std::move(), or the result of another function that -// generates a temporary; passing by copy will NOT work. Here is an example -// using scoped_ptr: -// -// void TakesOwnership(scoped_ptr<Foo> arg) { -// // Do something with arg. -// } -// scoped_ptr<Foo> CreateFoo() { -// // No need for calling std::move() for returning a move-only value, or -// // when you already have an rvalue as we do here. -// return scoped_ptr<Foo>(new Foo("new")); -// } -// scoped_ptr<Foo> PassThru(scoped_ptr<Foo> arg) { -// return arg; -// } -// -// { -// scoped_ptr<Foo> ptr(new Foo("yay")); // ptr manages Foo("yay"). -// TakesOwnership(std::move(ptr)); // ptr no longer owns Foo("yay"). -// scoped_ptr<Foo> ptr2 = CreateFoo(); // ptr2 owns the return Foo. -// scoped_ptr<Foo> ptr3 = // ptr3 now owns what was in ptr2. -// PassThru(std::move(ptr2)); // ptr2 is correspondingly nullptr. -// } -// -// Notice that if you do not call std::move() when returning from PassThru(), or -// when invoking TakesOwnership(), the code will not compile because scopers -// are not copyable; they only implement move semantics which require calling -// the std::move() function to signify a destructive transfer of state. -// CreateFoo() is different though because we are constructing a temporary on -// the return line and thus can avoid needing to call std::move(). -// -// The conversion move-constructor properly handles upcast in initialization, -// i.e. you can use a scoped_ptr<Child> to initialize a scoped_ptr<Parent>: -// -// scoped_ptr<Foo> foo(new Foo()); -// scoped_ptr<FooParent> parent(std::move(foo)); - -#ifndef BASE_MEMORY_SCOPED_PTR_H_ -#define BASE_MEMORY_SCOPED_PTR_H_ - -// This is an implementation designed to match the anticipated future TR2 -// implementation of the scoped_ptr class. - -// TODO(dcheng): Clean up these headers, but there are likely lots of existing -// IWYU violations. -#include <stddef.h> -#include <stdlib.h> - -#include <iosfwd> -#include <memory> -#include <type_traits> -#include <utility> - -#include "base/compiler_specific.h" -#include "base/logging.h" -#include "base/macros.h" -#include "base/move.h" -#include "build/build_config.h" - -namespace base { - -// Function object which invokes 'free' on its parameter, which must be -// a pointer. Can be used to store malloc-allocated pointers in scoped_ptr: -// -// scoped_ptr<int, base::FreeDeleter> foo_ptr( -// static_cast<int*>(malloc(sizeof(int)))); -struct FreeDeleter { - inline void operator()(void* ptr) const { - free(ptr); - } -}; - -} // namespace base - -template <typename T, typename D = std::default_delete<T>> -using scoped_ptr = std::unique_ptr<T, D>; - -// A function to convert T* into scoped_ptr<T> -// Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation -// for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg)) -template <typename T> -scoped_ptr<T> make_scoped_ptr(T* ptr) { - return scoped_ptr<T>(ptr); -} - -#endif // BASE_MEMORY_SCOPED_PTR_H_ |