/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
*/
/* 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/Atomics.h"

// This is an attempt to hide pointer values from the C++ compiler.  This might
// not stand up in the presence of PGO but that's probably not important.

// g_hidden_pointer is public so that it's limited what the compiler can assume
// about it, and atomic so that we don't run afoul of the compiler's UB
// analysis.

mozilla::Atomic<void*> g_hidden_pointer;

// Call this to install a pointer into the global.

MOZ_NEVER_INLINE void setHiddenPointer(void* p)
{
    g_hidden_pointer = p;
}

// Call this to retrieve the pointer.

MOZ_NEVER_INLINE void* getHiddenPointer()
{
    return g_hidden_pointer;
}