/* * Copyright (C) 2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "IsoTLSLayout.h" #include "IsoTLSEntry.h" namespace bmalloc { IsoTLSLayout::IsoTLSLayout(const std::lock_guard<Mutex>&) { } void IsoTLSLayout::add(IsoTLSEntry* entry) { static Mutex addingMutex; RELEASE_BASSERT(!entry->m_next); std::lock_guard<Mutex> locking(addingMutex); if (m_head) { RELEASE_BASSERT(m_tail); entry->m_offset = roundUpToMultipleOf(entry->alignment(), m_tail->extent()); m_tail->m_next = entry; m_tail = entry; } else { RELEASE_BASSERT(!m_tail); entry->m_offset = 0; m_head = entry; m_tail = entry; } } } // namespace bmalloc