The Tor Browser: intl/icu/source/common/uobject.cpp@fc2d59ddac77

     1 /*

     2 ******************************************************************************

3 *

     4 *   Copyright (C) 2002-2012, 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 */

    17 #include "unicode/uobject.h"

    18 #include "cmemory.h"

    20 U_NAMESPACE_BEGIN

    22 #if U_OVERRIDE_CXX_ALLOCATION

    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 * __cdecl 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 symbols

    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 the output

    55  * for which file and function calls the global new or delete operator,

    56  * and replace with uprv_malloc/uprv_free.

    57  */

    59 void * U_EXPORT2 UMemory::operator new(size_t size) U_NO_THROW {

    60     return uprv_malloc(size);

    61 }

    63 void U_EXPORT2 UMemory::operator delete(void *p) U_NO_THROW {

    64     if(p!=NULL) {

    65         uprv_free(p);

    66     }

    67 }

    69 void * U_EXPORT2 UMemory::operator new[](size_t size) U_NO_THROW {

    70     return uprv_malloc(size);

    71 }

    73 void U_EXPORT2 UMemory::operator delete[](void *p) U_NO_THROW {

    74     if(p!=NULL) {

    75         uprv_free(p);

    76     }

    77 }

    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 }

    84 void U_EXPORT2 UMemory::operator delete(void* p, const char* /*file*/, int /*line*/) U_NO_THROW {

    85     UMemory::operator delete(p);

    86 }

    87 #endif /* U_HAVE_DEBUG_LOCATION_NEW */

    90 #endif

    92 UObject::~UObject() {}

    94 UClassID UObject::getDynamicClassID() const { return NULL; }

    96 U_NAMESPACE_END

    98 U_NAMESPACE_USE

   100 U_CAPI void U_EXPORT2

   101 uprv_deleteUObject(void *obj) {

   102     delete static_cast<UObject *>(obj);

   103 }

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