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Side by Side Diff: base/memory/aligned_memory.h

Issue 168643002: Convert scoped_ptr_malloc -> scoped_ptr, part 1. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 10 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 // AlignedMemory is a POD type that gives you a portable way to specify static 5 // AlignedMemory is a POD type that gives you a portable way to specify static
6 // or local stack data of a given alignment and size. For example, if you need 6 // or local stack data of a given alignment and size. For example, if you need
7 // static storage for a class, but you want manual control over when the object 7 // static storage for a class, but you want manual control over when the object
8 // is constructed and destructed (you don't want static initialization and 8 // is constructed and destructed (you don't want static initialization and
9 // destruction), use AlignedMemory: 9 // destruction), use AlignedMemory:
10 // 10 //
11 // static AlignedMemory<sizeof(MyClass), ALIGNOF(MyClass)> my_class; 11 // static AlignedMemory<sizeof(MyClass), ALIGNOF(MyClass)> my_class;
12 // 12 //
13 // // ... at runtime: 13 // // ... at runtime:
14 // new(my_class.void_data()) MyClass(); 14 // new(my_class.void_data()) MyClass();
15 // 15 //
16 // // ... use it: 16 // // ... use it:
17 // MyClass* mc = my_class.data_as<MyClass>(); 17 // MyClass* mc = my_class.data_as<MyClass>();
18 // 18 //
19 // // ... later, to destruct my_class: 19 // // ... later, to destruct my_class:
20 // my_class.data_as<MyClass>()->MyClass::~MyClass(); 20 // my_class.data_as<MyClass>()->MyClass::~MyClass();
21 // 21 //
22 // Alternatively, a runtime sized aligned allocation can be created: 22 // Alternatively, a runtime sized aligned allocation can be created:
23 // 23 //
24 // float* my_array = static_cast<float*>(AlignedAlloc(size, alignment)); 24 // float* my_array = static_cast<float*>(AlignedAlloc(size, alignment));
25 // 25 //
26 // // ... later, to release the memory: 26 // // ... later, to release the memory:
27 // AlignedFree(my_array); 27 // AlignedFree(my_array);
28 // 28 //
29 // Or using scoped_ptr_malloc: 29 // Or using scoped_ptr:
30 // 30 //
31 // scoped_ptr_malloc<float, ScopedPtrAlignedFree> my_array( 31 // scoped_ptr<float, AlignedFreeDeleter> my_array(
32 // static_cast<float*>(AlignedAlloc(size, alignment))); 32 // static_cast<float*>(AlignedAlloc(size, alignment)));
33 33
34 #ifndef BASE_MEMORY_ALIGNED_MEMORY_H_ 34 #ifndef BASE_MEMORY_ALIGNED_MEMORY_H_
35 #define BASE_MEMORY_ALIGNED_MEMORY_H_ 35 #define BASE_MEMORY_ALIGNED_MEMORY_H_
36 36
37 #include "base/base_export.h" 37 #include "base/base_export.h"
38 #include "base/basictypes.h" 38 #include "base/basictypes.h"
39 #include "base/compiler_specific.h" 39 #include "base/compiler_specific.h"
40 40
41 #if defined(COMPILER_MSVC) 41 #if defined(COMPILER_MSVC)
(...skipping 63 matching lines...) Expand 10 before | Expand all | Expand 10 after
105 // scoped_ptr<Foo, base::AlignedFreeDeleter> foo; 105 // scoped_ptr<Foo, base::AlignedFreeDeleter> foo;
106 struct AlignedFreeDeleter { 106 struct AlignedFreeDeleter {
107 inline void operator()(void* ptr) const { 107 inline void operator()(void* ptr) const {
108 AlignedFree(ptr); 108 AlignedFree(ptr);
109 } 109 }
110 }; 110 };
111 111
112 } // namespace base 112 } // namespace base
113 113
114 #endif // BASE_MEMORY_ALIGNED_MEMORY_H_ 114 #endif // BASE_MEMORY_ALIGNED_MEMORY_H_
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