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