icuSources/common/uobject.cpp

   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) U_NOEXCEPT {
  62     return uprv_malloc(size);
  63 }
  64
  65 void U_EXPORT2 UMemory::operator delete(void *p) U_NOEXCEPT {
  66     if(p!=NULL) {
  67         uprv_free(p);
  68     }
  69 }
  70
  71 void * U_EXPORT2 UMemory::operator new[](size_t size) U_NOEXCEPT {
  72     return uprv_malloc(size);
  73 }
  74
  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
  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
  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
  94 UObject::~UObject() {}
  95
  96 UClassID UObject::getDynamicClassID() const { return NULL; }
  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 }