/* * Copyright (C) 2008, 2010 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. * 3. Neither the name of Apple Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "config.h" #include "SharedBuffer.h" #include <wtf/OSAllocator.h> #include <wtf/cf/TypeCastsCF.h> namespace WebCore { SharedBuffer::SharedBuffer(CFDataRef data) { append(data); } // Using Foundation allows for an even more efficient implementation of this function, // so only use this version for non-Foundation. #if !USE(FOUNDATION) RetainPtr<CFDataRef> SharedBuffer::createCFData() const { if (m_segments.size() == 1) { if (auto data = WTF::get_if<RetainPtr<CFDataRef>>(m_segments[0].segment->m_immutableData)) return *data; } return adoptCF(CFDataCreate(nullptr, reinterpret_cast<const UInt8*>(data()), size())); } #endif Ref<SharedBuffer> SharedBuffer::create(CFDataRef data) { return adoptRef(*new SharedBuffer(data)); } void SharedBuffer::hintMemoryNotNeededSoon() const { for (const auto& entry : m_segments) { if (entry.segment->hasOneRef()) { if (auto data = WTF::get_if<RetainPtr<CFDataRef>>(entry.segment->m_immutableData)) OSAllocator::hintMemoryNotNeededSoon(const_cast<UInt8*>(CFDataGetBytePtr(data->get())), CFDataGetLength(data->get())); } } } void SharedBuffer::append(CFDataRef data) { ASSERT(!m_hasBeenCombinedIntoOneSegment); if (data) { m_segments.append({m_size, DataSegment::create(data)}); m_size += CFDataGetLength(data); } ASSERT(internallyConsistent()); } }