70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
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/***
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*calloc_impl.c - implementation of _calloc_impl
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Defines the _calloc_impl() function.
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*
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*******************************************************************************/
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#include <malloc.h>
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#include <string.h>
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#include <winheap.h>
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#include <windows.h>
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#include <internal.h>
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#include <mtdll.h>
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#include <dbgint.h>
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#include <rtcsup.h>
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void * __cdecl _calloc_impl (size_t num, size_t size, int * errno_tmp)
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{
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size_t size_orig;
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void * pvReturn;
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/* ensure that (size * num) does not overflow */
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if (num > 0)
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{
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_VALIDATE_RETURN_NOEXC((_HEAP_MAXREQ / num) >= size, ENOMEM, NULL);
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}
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size_orig = size = size * num;
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/* force nonzero size */
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if (size == 0)
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size = 1;
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for (;;)
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{
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pvReturn = NULL;
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if (size <= _HEAP_MAXREQ)
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{
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if (pvReturn == NULL)
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pvReturn = HeapAlloc(_crtheap, HEAP_ZERO_MEMORY, size);
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}
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if (pvReturn || _newmode == 0)
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{
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RTCCALLBACK(_RTC_Allocate_hook, (pvReturn, size_orig, 0));
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if (pvReturn == NULL)
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{
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if ( errno_tmp )
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*errno_tmp = ENOMEM;
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}
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return pvReturn;
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}
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/* call installed new handler */
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if (!_callnewh(size))
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{
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if ( errno_tmp )
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*errno_tmp = ENOMEM;
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return NULL;
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}
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/* new handler was successful -- try to allocate again */
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}
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}
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