1 files changed, 102 insertions, 0 deletions
diff --git a/Source/WebCore/platform/cocoa/MachSendRight.cpp b/Source/WebCore/platform/cocoa/MachSendRight.cpp
new file mode 100644
index 000000000..0e9ebc70a
--- /dev/null
+++ b/Source/WebCore/platform/cocoa/MachSendRight.cpp
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2014 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 "MachSendRight.h"
+
+#include <mach/mach_error.h>
+#include <mach/mach_init.h>
+#include <utility>
+
+namespace WebCore {
+
+static void retainSendRight(mach_port_t port)
+{
+    if (!MACH_PORT_VALID(port))
+        return;
+
+    auto kr = mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_SEND, 1);
+    if (kr != KERN_SUCCESS)
+        LOG_ERROR("mach_port_mod_refs error: %s (%x)", mach_error_string(kr), kr);
+}
+
+static void releaseSendRight(mach_port_t port)
+{
+    if (!MACH_PORT_VALID(port))
+        return;
+
+    auto kr = mach_port_deallocate(mach_task_self(), port);
+    if (kr != KERN_SUCCESS)
+        LOG_ERROR("mach_port_deallocate error: %s (%x)", mach_error_string(kr), kr);
+}
+
+MachSendRight MachSendRight::adopt(mach_port_t port)
+{
+    return MachSendRight(port);
+}
+
+MachSendRight MachSendRight::create(mach_port_t port)
+{
+    retainSendRight(port);
+
+    return adopt(port);
+}
+
+MachSendRight::MachSendRight(mach_port_t port)
+    : m_port(port)
+{
+}
+
+MachSendRight::MachSendRight(MachSendRight&& other)
+    : m_port(other.leakSendRight())
+{
+}
+
+MachSendRight::~MachSendRight()
+{
+    releaseSendRight(m_port);
+}
+
+MachSendRight& MachSendRight::operator=(MachSendRight&& other)
+{
+    if (this != &other) {
+        releaseSendRight(m_port);
+        m_port = other.leakSendRight();
+    }
+
+    return *this;
+}
+
+MachSendRight MachSendRight::copySendRight() const
+{
+    return create(m_port);
+}
+
+mach_port_t MachSendRight::leakSendRight()
+{
+    return std::exchange(m_port, MACH_PORT_NULL);
+}
+
+}