1 files changed, 113 insertions, 0 deletions
diff --git a/Source/WebKit2/Platform/IPC/unix/UnixMessage.h b/Source/WebKit2/Platform/IPC/unix/UnixMessage.h
new file mode 100644
index 000000000..6e98a7374
--- /dev/null
+++ b/Source/WebKit2/Platform/IPC/unix/UnixMessage.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2011,2017 Igalia S.L.
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include "Attachment.h"
+#include <wtf/Vector.h>
+
+namespace IPC {
+
+class MessageInfo {
+public:
+    MessageInfo() = default;
+
+    MessageInfo(size_t bodySize, size_t initialAttachmentCount)
+        : m_bodySize(bodySize)
+        , m_attachmentCount(initialAttachmentCount)
+    {
+    }
+
+    void setBodyOutOfLine()
+    {
+        ASSERT(!isBodyOutOfLine());
+
+        m_isBodyOutOfLine = true;
+        m_attachmentCount++;
+    }
+
+    bool isBodyOutOfLine() const { return m_isBodyOutOfLine; }
+    size_t bodySize() const { return m_bodySize; }
+    size_t attachmentCount() const { return m_attachmentCount; }
+
+private:
+    size_t m_bodySize { 0 };
+    size_t m_attachmentCount { 0 };
+    bool m_isBodyOutOfLine { false };
+};
+
+class UnixMessage {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    UnixMessage(Encoder& encoder)
+        : m_attachments(encoder.releaseAttachments())
+        , m_messageInfo(encoder.bufferSize(), m_attachments.size())
+        , m_body(encoder.buffer())
+    {
+    }
+
+    UnixMessage(UnixMessage&& other)
+    {
+        m_attachments = WTFMove(other.m_attachments);
+        m_messageInfo = WTFMove(other.m_messageInfo);
+        if (other.m_bodyOwned) {
+            std::swap(m_body, other.m_body);
+            std::swap(m_bodyOwned, other.m_bodyOwned);
+        } else if (!m_messageInfo.isBodyOutOfLine()) {
+            m_body = static_cast<uint8_t*>(fastMalloc(m_messageInfo.bodySize()));
+            memcpy(m_body, other.m_body, m_messageInfo.bodySize());
+            m_bodyOwned = true;
+            other.m_body = nullptr;
+            other.m_bodyOwned = false;
+        }
+    }
+
+    ~UnixMessage()
+    {
+        if (m_bodyOwned)
+            fastFree(m_body);
+    }
+
+    const Vector<Attachment>& attachments() const { return m_attachments; }
+    MessageInfo& messageInfo() { return m_messageInfo; }
+
+    uint8_t* body() const { return m_body; }
+    size_t bodySize() const  { return m_messageInfo.bodySize(); }
+
+    void appendAttachment(Attachment&& attachment)
+    {
+        m_attachments.append(WTFMove(attachment));
+    }
+
+private:
+    Vector<Attachment> m_attachments;
+    MessageInfo m_messageInfo;
+    uint8_t* m_body { nullptr };
+    bool m_bodyOwned { false };
+};
+
+} // namespace IPC