1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 * Copyright (C) 2002-2012, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 ******************************************************************************
10 * file name: uobject.h
11 * encoding: UTF-8
12 * tab size: 8 (not used)
13 * indentation:4
14 *
15 * created on: 2002jun26
16 * created by: Markus W. Scherer
17 */
18
19 #include "unicode/uobject.h"
20 #include "cmemory.h"
21
22 U_NAMESPACE_BEGIN
23
24 #if U_OVERRIDE_CXX_ALLOCATION
25
26 /*
27 * Default implementation of UMemory::new/delete
28 * using uprv_malloc() and uprv_free().
29 *
30 * For testing, this is used together with a list of imported symbols to verify
31 * that ICU is not using the global ::new and ::delete operators.
32 *
33 * These operators can be implemented like this or any other appropriate way
34 * when customizing ICU for certain environments.
35 * Whenever ICU is customized in binary incompatible ways please be sure
36 * to use library name suffixes to distinguish such libraries from
37 * the standard build.
38 *
39 * Instead of just modifying these C++ new/delete operators, it is usually best
40 * to modify the uprv_malloc()/uprv_free()/uprv_realloc() functions in cmemory.c.
41 *
42 * Memory test on Windows/MSVC 6:
43 * The global operators new and delete look as follows:
44 * 04F 00000000 UNDEF notype () External | ??2@YAPAXI@Z (void * __cdecl operator new(unsigned int))
45 * 03F 00000000 UNDEF notype () External | ??3@YAXPAX@Z (void __cdecl operator delete(void *))
46 *
47 * These lines are from output generated by the MSVC 6 tool dumpbin with
48 * dumpbin /symbols *.obj
49 *
50 * ??2@YAPAXI@Z and ??3@YAXPAX@Z are the linker symbols in the .obj
51 * files and are imported from msvcrtd.dll (in a debug build).
52 *
53 * Make sure that with the UMemory operators new and delete defined these two symbols
54 * do not appear in the dumpbin /symbols output for the ICU libraries!
55 *
56 * If such a symbol appears in the output then look in the preceding lines in the output
57 * for which file and function calls the global new or delete operator,
58 * and replace with uprv_malloc/uprv_free.
59 */
60
operator new(size_t size)61 void * U_EXPORT2 UMemory::operator new(size_t size) U_NOEXCEPT {
62 return uprv_malloc(size);
63 }
64
operator delete(void * p)65 void U_EXPORT2 UMemory::operator delete(void *p) U_NOEXCEPT {
66 if(p!=NULL) {
67 uprv_free(p);
68 }
69 }
70
operator new[](size_t size)71 void * U_EXPORT2 UMemory::operator new[](size_t size) U_NOEXCEPT {
72 return uprv_malloc(size);
73 }
74
operator delete[](void * p)75 void U_EXPORT2 UMemory::operator delete[](void *p) U_NOEXCEPT {
76 if(p!=NULL) {
77 uprv_free(p);
78 }
79 }
80
81 #if U_HAVE_DEBUG_LOCATION_NEW
operator new(size_t size,const char *,int)82 void * U_EXPORT2 UMemory::operator new(size_t size, const char* /*file*/, int /*line*/) U_NOEXCEPT {
83 return UMemory::operator new(size);
84 }
85
operator delete(void * p,const char *,int)86 void U_EXPORT2 UMemory::operator delete(void* p, const char* /*file*/, int /*line*/) U_NOEXCEPT {
87 UMemory::operator delete(p);
88 }
89 #endif /* U_HAVE_DEBUG_LOCATION_NEW */
90
91
92 #endif
93
~UObject()94 UObject::~UObject() {}
95
getDynamicClassID() const96 UClassID UObject::getDynamicClassID() const { return NULL; }
97
98 U_NAMESPACE_END
99
100 U_NAMESPACE_USE
101
102 U_CAPI void U_EXPORT2
uprv_deleteUObject(void * obj)103 uprv_deleteUObject(void *obj) {
104 delete static_cast<UObject *>(obj);
105 }
106