/* * Copyright (C) 2016 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. 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 INC. 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 "MachMessage.h" #include <mach/mach.h> namespace IPC { std::unique_ptr<MachMessage> MachMessage::create(size_t size) { void* memory = WTF::fastMalloc(sizeof(MachMessage) + size); return std::unique_ptr<MachMessage> { new (NotNull, memory) MachMessage { size } }; } MachMessage::MachMessage(size_t size) : m_size { size } , m_shouldFreeDescriptors { true } { } MachMessage::~MachMessage() { if (m_shouldFreeDescriptors) ::mach_msg_destroy(header()); } size_t MachMessage::messageSize(size_t bodySize, size_t portDescriptorCount, size_t memoryDescriptorCount) { size_t messageSize = sizeof(mach_msg_header_t) + bodySize; if (portDescriptorCount || memoryDescriptorCount) { messageSize += sizeof(mach_msg_body_t); if (portDescriptorCount) messageSize += (portDescriptorCount * sizeof(mach_msg_port_descriptor_t)); if (memoryDescriptorCount) messageSize += (memoryDescriptorCount * sizeof(mach_msg_ool_descriptor_t)); } return round_msg(messageSize); } mach_msg_header_t* MachMessage::header() { return reinterpret_cast<mach_msg_header_t*>(m_buffer); } void MachMessage::leakDescriptors() { m_shouldFreeDescriptors = false; } }