uobject.cpp (3257B)
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 61 void * U_EXPORT2 UMemory::operator new(size_t size) noexcept { 62 return uprv_malloc(size); 63 } 64 65 void U_EXPORT2 UMemory::operator delete(void *p) noexcept { 66 if(p!=nullptr) { 67 uprv_free(p); 68 } 69 } 70 71 void * U_EXPORT2 UMemory::operator new[](size_t size) noexcept { 72 return uprv_malloc(size); 73 } 74 75 void U_EXPORT2 UMemory::operator delete[](void *p) noexcept { 76 if(p!=nullptr) { 77 uprv_free(p); 78 } 79 } 80 81 #if U_HAVE_DEBUG_LOCATION_NEW 82 void * U_EXPORT2 UMemory::operator new(size_t size, const char* /*file*/, int /*line*/) noexcept { 83 return UMemory::operator new(size); 84 } 85 86 void U_EXPORT2 UMemory::operator delete(void* p, const char* /*file*/, int /*line*/) noexcept { 87 UMemory::operator delete(p); 88 } 89 #endif /* U_HAVE_DEBUG_LOCATION_NEW */ 90 91 92 #endif 93 94 UObject::~UObject() {} 95 96 UClassID UObject::getDynamicClassID() const { return nullptr; } 97 98 U_NAMESPACE_END 99 100 U_NAMESPACE_USE 101 102 U_CAPI void U_EXPORT2 103 uprv_deleteUObject(void *obj) { 104 delete static_cast<UObject *>(obj); 105 }