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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozilla_mscom_VTableBuilder_h
#define mozilla_mscom_VTableBuilder_h
#include <stdint.h>
#include <unknwn.h>
#if defined(__cplusplus)
extern "C" {
#endif
/**
* This function constructs an interface with |aVtblSize| entries, where the
* IUnknown methods are valid and redirect to |aUnk|. Other than the IUnknown
* methods, the resulting interface is not intended to actually be called; the
* remaining vtable entries are null pointers to enforce that.
*
* @param aUnk The IUnknown to which the null vtable will redirect its IUnknown
* methods.
* @param aVtblSize The total size of the vtable, including the IUnknown
* entries (thus this parameter must be >= 3).
* @return The resulting IUnknown, or nullptr on error.
*/
IUnknown* BuildNullVTable(IUnknown* aUnk, uint32_t aVtblSize);
void DeleteNullVTable(IUnknown* aUnk);
#if defined(__cplusplus)
}
#endif
#endif // mozilla_mscom_VTableBuilder_h
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