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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=4 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/mozalloc.h"
#include <windows.h>
#if !defined(MOZ_MEMORY)
# include <malloc.h>
# define malloc_impl malloc
# define calloc_impl calloc
# define realloc_impl realloc
# define free_impl free
#endif
// Warning: C4273: 'HeapAlloc': inconsistent dll linkage
// The Windows headers define HeapAlloc as dllimport, but we define it as
// dllexport, which is a voluntary inconsistency.
#pragma warning(disable : 4273)
MFBT_API
LPVOID WINAPI HeapAlloc(_In_ HANDLE hHeap, _In_ DWORD dwFlags,
_In_ SIZE_T dwBytes) {
if (dwFlags & HEAP_ZERO_MEMORY) {
return calloc_impl(1, dwBytes);
}
return malloc_impl(dwBytes);
}
MFBT_API
LPVOID WINAPI HeapReAlloc(_In_ HANDLE hHeap, _In_ DWORD dwFlags,
_In_ LPVOID lpMem, _In_ SIZE_T dwBytes) {
// The HeapReAlloc contract is that failures preserve the existing
// allocation. We can't try to realloc in-place without possibly
// freeing the original allocation, breaking the contract.
// We also can't guarantee we zero all the memory from the end of
// the original allocation to the end of the new one because of the
// difference between the originally requested size and what
// malloc_usable_size would return us.
// So for both cases, just tell the caller we can't do what they
// requested.
if (dwFlags & (HEAP_REALLOC_IN_PLACE_ONLY | HEAP_ZERO_MEMORY)) {
return NULL;
}
return realloc_impl(lpMem, dwBytes);
}
MFBT_API
BOOL WINAPI HeapFree(_In_ HANDLE hHeap, _In_ DWORD dwFlags, _In_ LPVOID lpMem) {
free_impl(lpMem);
return true;
}
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