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114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
/*
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******************************************************************************
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*
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* Copyright (C) 2002-2005, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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* file name: uobject.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2002jun26
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* created by: Markus W. Scherer
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*/
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#include "unicode/uobject.h"
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#include "cmemory.h"
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U_NAMESPACE_BEGIN
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#if U_OVERRIDE_CXX_ALLOCATION
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/*
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* Default implementation of UMemory::new/delete
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* using uprv_malloc() and uprv_free().
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*
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* For testing, this is used together with a list of imported symbols to verify
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* that ICU is not using the global ::new and ::delete operators.
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*
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* These operators can be implemented like this or any other appropriate way
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* when customizing ICU for certain environments.
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* Whenever ICU is customized in binary incompatible ways please be sure
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* to use library name suffixes to distinguish such libraries from
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* the standard build.
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*
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* Instead of just modifying these C++ new/delete operators, it is usually best
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* to modify the uprv_malloc()/uprv_free()/uprv_realloc() functions in cmemory.c.
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*
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* Memory test on Windows/MSVC 6:
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* The global operators new and delete look as follows:
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* 04F 00000000 UNDEF notype () External | ??2@YAPAXI@Z (void * __cdecl operator new(unsigned int))
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* 03F 00000000 UNDEF notype () External | ??3@YAXPAX@Z (void __cdecl operator delete(void *))
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*
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* These lines are from output generated by the MSVC 6 tool dumpbin with
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* dumpbin /symbols *.obj
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*
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* ??2@YAPAXI@Z and ??3@YAXPAX@Z are the linker symbols in the .obj
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* files and are imported from msvcrtd.dll (in a debug build).
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*
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* Make sure that with the UMemory operators new and delete defined these two symbols
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* do not appear in the dumpbin /symbols output for the ICU libraries!
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*
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* If such a symbol appears in the output then look in the preceding lines in the output
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* for which file and function calls the global new or delete operator,
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* and replace with uprv_malloc/uprv_free.
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*/
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void * U_EXPORT2 UMemory::operator new(size_t size) {
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return uprv_malloc(size);
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}
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void U_EXPORT2 UMemory::operator delete(void *p) {
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if(p!=NULL) {
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uprv_free(p);
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}
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}
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void * U_EXPORT2 UMemory::operator new[](size_t size) {
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return uprv_malloc(size);
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}
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void U_EXPORT2 UMemory::operator delete[](void *p) {
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if(p!=NULL) {
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uprv_free(p);
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}
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}
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#if U_HAVE_DEBUG_LOCATION_NEW
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void * U_EXPORT2 UMemory::operator new(size_t size, const char* /*file*/, int /*line*/) {
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return UMemory::operator new(size);
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}
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void U_EXPORT2 UMemory::operator delete(void* p, const char* /*file*/, int /*line*/) {
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UMemory::operator delete(p);
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}
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#endif /* U_HAVE_DEBUG_LOCATION_NEW */
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#endif
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UObject::~UObject() {}
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// Future implementation for RTTI that support subtyping. [alan]
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//
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// UClassID UObject::getStaticClassID() {
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// return (UClassID) NULL;
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// }
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//
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// UBool UObject::instanceOf(UClassID type) const {
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// UClassID c = getDynamicClassID();
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// for (;;) {
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// if (c == type) {
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// return TRUE;
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// } else if (c == (UClassID) NULL) {
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// return FALSE;
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// }
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// c = * (UClassID*) c;
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// }
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// }
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U_NAMESPACE_END
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