void * __cdecl _expand_base (void * pBlock, size_t newsize)
{
void * pvReturn;
/* validation section */
_VALIDATE_RETURN(pBlock != NULL, EINVAL, NULL);
if (newsize > _HEAP_MAXREQ) {
errno = ENOMEM;
return NULL;
}
#ifndef _WIN64
if ( __active_heap == __V6_HEAP )
{
PHEADER pHeader;
_mlock( _HEAP_LOCK );
__try {
// if allocation block lies within the small-block heap,
// try to resize it there
if ((pHeader = __sbh_find_block(pBlock)) != NULL)
{
pvReturn = NULL;
if ( (newsize <= __sbh_threshold) &&
__sbh_resize_block(pHeader, pBlock, (int)newsize) )
pvReturn = pBlock;
}
}
__finally {
_munlock( _HEAP_LOCK );
}
if ( pHeader == NULL )
{
// force nonzero size and round up to next paragraph
if (newsize == 0)
newsize = 1;
newsize = (newsize + BYTES_PER_PARA - 1) & ~(BYTES_PER_PARA - 1);
pvReturn = HeapReAlloc(_crtheap, HEAP_REALLOC_IN_PLACE_ONLY,
pBlock, newsize);
if (pvReturn == NULL)
{
errno = _get_errno_from_oserr(GetLastError());
}
}
}
unsigned __cdecl _getdiskfree (
unsigned uDrive,
struct _diskfree_t * pdf
)
{
char Root[4];
char * pRoot;
_VALIDATE_RETURN((pdf != NULL), EINVAL, ERROR_INVALID_PARAMETER);
_VALIDATE_RETURN(( uDrive <= 26 ), EINVAL, ERROR_INVALID_PARAMETER);
memset( pdf, 0, sizeof( struct _diskfree_t ) );
if ( uDrive == 0 ) {
pRoot = NULL;
}
else {
pRoot = &Root[0];
Root[0] = (char)uDrive + (char)('A' - 1);
Root[1] = ':';
Root[2] = '\\';
Root[3] = '\0';
}
if ( !GetDiskFreeSpace( pRoot,
(LPDWORD)&(pdf->sectors_per_cluster),
(LPDWORD)&(pdf->bytes_per_sector),
(LPDWORD)&(pdf->avail_clusters),
(LPDWORD)&(pdf->total_clusters)) )
{
int err = GetLastError();
errno = _get_errno_from_oserr(err);
return ( err );
}
return ( 0 );
}
errno_t __cdecl rand_s
(
unsigned int *_RandomValue
)
{
PGENRANDOM pfnRtlGenRandom = (PGENRANDOM) DecodePointer(g_pfnRtlGenRandom);
_VALIDATE_RETURN_ERRCODE( _RandomValue != NULL, EINVAL );
*_RandomValue = 0; // Review : better value to initialize it to?
if ( pfnRtlGenRandom == NULL )
{
PGENRANDOM encoded;
void* enull;
#ifdef _CORESYS
#define RAND_DLL L"cryptbase.dll"
#else /* _CORESYS */
#define RAND_DLL L"ADVAPI32.DLL"
#endif /* _CORESYS */
// advapi32.dll/cryptbase.dll is unloaded when the App exits.
HMODULE hRandDll = LoadLibraryExW(RAND_DLL, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
#ifndef _CORESYS
if (!hRandDll && GetLastError() == ERROR_INVALID_PARAMETER)
{
// LOAD_LIBRARY_SEARCH_SYSTEM32 is not supported on this platfrom,
// try one more time using default options
hRandDll = LoadLibraryExW(RAND_DLL, NULL, 0);
}
#endif /* _CORESYS */
if (!hRandDll)
{
_VALIDATE_RETURN_ERRCODE(("rand_s is not available on this platform", 0), EINVAL);
}
pfnRtlGenRandom = ( PGENRANDOM ) GetProcAddress( hRandDll, _TO_STR( RtlGenRandom ) );
if ( pfnRtlGenRandom == NULL )
{
_VALIDATE_RETURN_ERRCODE(("rand_s is not available on this platform", 0), _get_errno_from_oserr(GetLastError()));
}
encoded = (PGENRANDOM) EncodePointer(pfnRtlGenRandom);
enull = EncodePointer(NULL);
#ifdef _M_IX86
if ( (void*)(LONG_PTR)InterlockedExchange(
( LONG* )&g_pfnRtlGenRandom,
( LONG )( LONG_PTR )encoded)
!= enull )
#else /* _M_IX86 */
if ( InterlockedExchangePointer(
( void** )&g_pfnRtlGenRandom,
( void* )encoded)
!= enull )
#endif /* _M_IX86 */
{
/* A different thread has already loaded advapi32.dll/cryptbase.dll. */
FreeLibrary( hRandDll );
}
}
if ( !(*pfnRtlGenRandom)( _RandomValue, ( ULONG )sizeof( unsigned int ) ) )
{
errno = ENOMEM;
return errno;
}
return 0;
}
_CRTIMP void __cdecl _dosmaperr(
unsigned long oserrno
) {
_doserrno = oserrno; /* set _doserrno */
errno = _get_errno_from_oserr(oserrno);
}
errno_t __cdecl rand_s
(
unsigned int* _RandomValue
) {
PGENRANDOM pfnRtlGenRandom = _decode_pointer(g_pfnRtlGenRandom);
_VALIDATE_RETURN_ERRCODE(_RandomValue != NULL, EINVAL);
*_RandomValue = 0; // Review : better value to initialize it to?
if (pfnRtlGenRandom == NULL) {
PGENRANDOM encoded;
void* enull;
// Advapi32.dll is unloaded when the App exits.
HMODULE hAdvApi32 = LoadLibrary("ADVAPI32.DLL");
if (!hAdvApi32) {
_VALIDATE_RETURN_ERRCODE(("rand_s is not available on this platform", 0), EINVAL);
}
pfnRtlGenRandom = (PGENRANDOM) GetProcAddress(hAdvApi32, _TO_STR(RtlGenRandom));
if (pfnRtlGenRandom == NULL) {
_VALIDATE_RETURN_ERRCODE(("rand_s is not available on this platform", 0), _get_errno_from_oserr(GetLastError()));
}
encoded = (PGENRANDOM) _encode_pointer(pfnRtlGenRandom);
enull = _encoded_null();
#ifdef _M_IX86
if ((void*)(LONG_PTR)InterlockedExchange(
(LONG*)&g_pfnRtlGenRandom,
(LONG)(LONG_PTR)encoded)
!= enull)
#else /* _M_IX86 */
if (InterlockedExchangePointer(
(void**)&g_pfnRtlGenRandom,
(void*)encoded)
!= enull)
#endif /* _M_IX86 */
{
/* A different thread has already loaded advapi32.dll. */
FreeLibrary(hAdvApi32);
}
}
if (!(*pfnRtlGenRandom)(_RandomValue, (ULONG)sizeof(unsigned int))) {
errno = ENOMEM;
return errno;
}
return 0;
}
