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| 1 /* |
| 2 ****************************************************************************** |
| 3 * |
| 4 * Copyright (C) 2002-2008, International Business Machines |
| 5 * Corporation and others. All Rights Reserved. |
| 6 * |
| 7 ****************************************************************************** |
| 8 * file name: uobject.h |
| 9 * encoding: US-ASCII |
| 10 * tab size: 8 (not used) |
| 11 * indentation:4 |
| 12 * |
| 13 * created on: 2002jun26 |
| 14 * created by: Markus W. Scherer |
| 15 */ |
| 16 |
| 17 #include "unicode/uobject.h" |
| 18 #include "cmemory.h" |
| 19 |
| 20 U_NAMESPACE_BEGIN |
| 21 |
| 22 #if U_OVERRIDE_CXX_ALLOCATION |
| 23 |
| 24 /* |
| 25 * Default implementation of UMemory::new/delete |
| 26 * using uprv_malloc() and uprv_free(). |
| 27 * |
| 28 * For testing, this is used together with a list of imported symbols to verify |
| 29 * that ICU is not using the global ::new and ::delete operators. |
| 30 * |
| 31 * These operators can be implemented like this or any other appropriate way |
| 32 * when customizing ICU for certain environments. |
| 33 * Whenever ICU is customized in binary incompatible ways please be sure |
| 34 * to use library name suffixes to distinguish such libraries from |
| 35 * the standard build. |
| 36 * |
| 37 * Instead of just modifying these C++ new/delete operators, it is usually best |
| 38 * to modify the uprv_malloc()/uprv_free()/uprv_realloc() functions in cmemory.c
. |
| 39 * |
| 40 * Memory test on Windows/MSVC 6: |
| 41 * The global operators new and delete look as follows: |
| 42 * 04F 00000000 UNDEF notype () External | ??2@YAPAXI@Z (void * __cdec
l operator new(unsigned int)) |
| 43 * 03F 00000000 UNDEF notype () External | ??3@YAXPAX@Z (void __cdecl
operator delete(void *)) |
| 44 * |
| 45 * These lines are from output generated by the MSVC 6 tool dumpbin with |
| 46 * dumpbin /symbols *.obj |
| 47 * |
| 48 * ??2@YAPAXI@Z and ??3@YAXPAX@Z are the linker symbols in the .obj |
| 49 * files and are imported from msvcrtd.dll (in a debug build). |
| 50 * |
| 51 * Make sure that with the UMemory operators new and delete defined these two sy
mbols |
| 52 * do not appear in the dumpbin /symbols output for the ICU libraries! |
| 53 * |
| 54 * If such a symbol appears in the output then look in the preceding lines in th
e output |
| 55 * for which file and function calls the global new or delete operator, |
| 56 * and replace with uprv_malloc/uprv_free. |
| 57 */ |
| 58 |
| 59 void * U_EXPORT2 UMemory::operator new(size_t size) U_NO_THROW { |
| 60 return uprv_malloc(size); |
| 61 } |
| 62 |
| 63 void U_EXPORT2 UMemory::operator delete(void *p) U_NO_THROW { |
| 64 if(p!=NULL) { |
| 65 uprv_free(p); |
| 66 } |
| 67 } |
| 68 |
| 69 void * U_EXPORT2 UMemory::operator new[](size_t size) U_NO_THROW { |
| 70 return uprv_malloc(size); |
| 71 } |
| 72 |
| 73 void U_EXPORT2 UMemory::operator delete[](void *p) U_NO_THROW { |
| 74 if(p!=NULL) { |
| 75 uprv_free(p); |
| 76 } |
| 77 } |
| 78 |
| 79 #if U_HAVE_DEBUG_LOCATION_NEW |
| 80 void * U_EXPORT2 UMemory::operator new(size_t size, const char* /*file*/, int /*
line*/) U_NO_THROW { |
| 81 return UMemory::operator new(size); |
| 82 } |
| 83 |
| 84 void U_EXPORT2 UMemory::operator delete(void* p, const char* /*file*/, int /*lin
e*/) U_NO_THROW { |
| 85 UMemory::operator delete(p); |
| 86 } |
| 87 #endif /* U_HAVE_DEBUG_LOCATION_NEW */ |
| 88 |
| 89 |
| 90 #endif |
| 91 |
| 92 UObject::~UObject() {} |
| 93 |
| 94 // Future implementation for RTTI that support subtyping. [alan] |
| 95 // |
| 96 // UClassID UObject::getStaticClassID() { |
| 97 // return (UClassID) NULL; |
| 98 // } |
| 99 // |
| 100 // UBool UObject::instanceOf(UClassID type) const { |
| 101 // UClassID c = getDynamicClassID(); |
| 102 // for (;;) { |
| 103 // if (c == type) { |
| 104 // return TRUE; |
| 105 // } else if (c == (UClassID) NULL) { |
| 106 // return FALSE; |
| 107 // } |
| 108 // c = * (UClassID*) c; |
| 109 // } |
| 110 // } |
| 111 |
| 112 U_NAMESPACE_END |
| 113 |
| 114 |
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