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Side by Side Diff: core/fxcrt/fx_memory.h

Issue 2382723003: Move core/fxcrt/include to core/fxcrt (Closed)
Patch Set: Rebase to master Created 4 years, 2 months ago
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1 // Copyright 2014 PDFium Authors. All rights reserved. 1 // Copyright 2014 PDFium 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 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 6
7 #ifndef CORE_FXCRT_INCLUDE_FX_MEMORY_H_ 7 #ifndef CORE_FXCRT_FX_MEMORY_H_
8 #define CORE_FXCRT_INCLUDE_FX_MEMORY_H_ 8 #define CORE_FXCRT_FX_MEMORY_H_
9 9
10 #include "core/fxcrt/include/fx_system.h" 10 #include "core/fxcrt/fx_system.h"
11 11
12 #ifdef __cplusplus 12 #ifdef __cplusplus
13 extern "C" { 13 extern "C" {
14 #endif 14 #endif
15 15
16 // For external C libraries to malloc through PDFium. These may return nullptr. 16 // For external C libraries to malloc through PDFium. These may return nullptr.
17 void* FXMEM_DefaultAlloc(size_t byte_size, int flags); 17 void* FXMEM_DefaultAlloc(size_t byte_size, int flags);
18 void* FXMEM_DefaultRealloc(void* pointer, size_t new_size, int flags); 18 void* FXMEM_DefaultRealloc(void* pointer, size_t new_size, int flags);
19 void FXMEM_DefaultFree(void* pointer, int flags); 19 void FXMEM_DefaultFree(void* pointer, int flags);
20 20
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56 size_t num_members, 56 size_t num_members,
57 size_t member_size) { 57 size_t member_size) {
58 if (void* result = FX_SafeRealloc(ptr, num_members, member_size)) { 58 if (void* result = FX_SafeRealloc(ptr, num_members, member_size)) {
59 return result; 59 return result;
60 } 60 }
61 FX_OutOfMemoryTerminate(); // Never returns. 61 FX_OutOfMemoryTerminate(); // Never returns.
62 return nullptr; // Suppress compiler warning. 62 return nullptr; // Suppress compiler warning.
63 } 63 }
64 64
65 // Never returns nullptr. 65 // Never returns nullptr.
66 #define FX_Alloc(type, size) (type*) FX_AllocOrDie(size, sizeof(type)) 66 #define FX_Alloc(type, size) (type*)FX_AllocOrDie(size, sizeof(type))
67 #define FX_Alloc2D(type, w, h) (type*) FX_AllocOrDie2D(w, h, sizeof(type)) 67 #define FX_Alloc2D(type, w, h) (type*)FX_AllocOrDie2D(w, h, sizeof(type))
68 #define FX_Realloc(type, ptr, size) \ 68 #define FX_Realloc(type, ptr, size) \
69 (type*) FX_ReallocOrDie(ptr, size, sizeof(type)) 69 (type*)FX_ReallocOrDie(ptr, size, sizeof(type))
70 70
71 // May return nullptr. 71 // May return nullptr.
72 #define FX_TryAlloc(type, size) (type*) calloc(size, sizeof(type)) 72 #define FX_TryAlloc(type, size) (type*)calloc(size, sizeof(type))
73 #define FX_TryRealloc(type, ptr, size) \ 73 #define FX_TryRealloc(type, ptr, size) \
74 (type*) FX_SafeRealloc(ptr, size, sizeof(type)) 74 (type*)FX_SafeRealloc(ptr, size, sizeof(type))
75 75
76 #define FX_Free(ptr) free(ptr) 76 #define FX_Free(ptr) free(ptr)
77 77
78 // The FX_ArraySize(arr) macro returns the # of elements in an array arr. 78 // The FX_ArraySize(arr) macro returns the # of elements in an array arr.
79 // The expression is a compile-time constant, and therefore can be 79 // The expression is a compile-time constant, and therefore can be
80 // used in defining new arrays, for example. If you use FX_ArraySize on 80 // used in defining new arrays, for example. If you use FX_ArraySize on
81 // a pointer by mistake, you will get a compile-time error. 81 // a pointer by mistake, you will get a compile-time error.
82 // 82 //
83 // One caveat is that FX_ArraySize() doesn't accept any array of an 83 // One caveat is that FX_ArraySize() doesn't accept any array of an
84 // anonymous type or a type defined inside a function. 84 // anonymous type or a type defined inside a function.
85 #define FX_ArraySize(array) (sizeof(ArraySizeHelper(array))) 85 #define FX_ArraySize(array) (sizeof(ArraySizeHelper(array)))
86 86
87 // This template function declaration is used in defining FX_ArraySize. 87 // This template function declaration is used in defining FX_ArraySize.
88 // Note that the function doesn't need an implementation, as we only 88 // Note that the function doesn't need an implementation, as we only
89 // use its type. 89 // use its type.
90 template <typename T, size_t N> 90 template <typename T, size_t N>
91 char(&ArraySizeHelper(T(&array)[N]))[N]; 91 char (&ArraySizeHelper(T (&array)[N]))[N];
92 92
93 // Used with std::unique_ptr to FX_Free raw memory. 93 // Used with std::unique_ptr to FX_Free raw memory.
94 struct FxFreeDeleter { 94 struct FxFreeDeleter {
95 inline void operator()(void* ptr) const { FX_Free(ptr); } 95 inline void operator()(void* ptr) const { FX_Free(ptr); }
96 }; 96 };
97 97
98 // Used with std::unique_ptr to Release() objects that can't be deleted. 98 // Used with std::unique_ptr to Release() objects that can't be deleted.
99 template <class T> 99 template <class T>
100 struct ReleaseDeleter { 100 struct ReleaseDeleter {
101 inline void operator()(T* ptr) const { ptr->Release(); } 101 inline void operator()(T* ptr) const { ptr->Release(); }
102 }; 102 };
103 103
104 // Used to help transfer ownership of a raw pointer to std::unique_ptr. 104 // Used to help transfer ownership of a raw pointer to std::unique_ptr.
105 template <typename T> 105 template <typename T>
106 std::unique_ptr<T> WrapUnique(T* ptr) { 106 std::unique_ptr<T> WrapUnique(T* ptr) {
107 return std::unique_ptr<T>(ptr); 107 return std::unique_ptr<T>(ptr);
108 } 108 }
109 109
110 #endif // __cplusplus 110 #endif // __cplusplus
111 111
112 #endif // CORE_FXCRT_INCLUDE_FX_MEMORY_H_ 112 #endif // CORE_FXCRT_FX_MEMORY_H_
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