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/*
* Copyright 2017 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#if defined(WEBRTC_WIN)
#include <windows.h>
#else
#include <string.h>
#endif
#include "rtc_base/checks.h"
#include "rtc_base/zero_memory.h"
namespace rtc {
// Code and comment taken from "OPENSSL_cleanse" of BoringSSL.
void ExplicitZeroMemory(void* ptr, size_t len) {
RTC_DCHECK(ptr || !len);
#if defined(WEBRTC_WIN)
SecureZeroMemory(ptr, len);
#else
memset(ptr, 0, len);
#if !defined(__pnacl__)
/* As best as we can tell, this is sufficient to break any optimisations that
might try to eliminate "superfluous" memsets. If there's an easy way to
detect memset_s, it would be better to use that. */
__asm__ __volatile__("" : : "r"(ptr) : "memory"); // NOLINT
#endif
#endif // !WEBRTC_WIN
}
} // namespace rtc
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