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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ipc_SharedMemoryBasic_mach_h
+#define mozilla_ipc_SharedMemoryBasic_mach_h
+
+#include "base/file_descriptor_posix.h"
+#include "base/process.h"
+
+#include "SharedMemory.h"
+#include <mach/port.h>
+
+//
+// This is a low-level wrapper around platform shared memory. Don't
+// use it directly; use Shmem allocated through IPDL interfaces.
+//
+
+class MachPortSender;
+class ReceivePort;
+
+namespace mozilla {
+namespace ipc {
+
+class SharedMemoryBasic final : public SharedMemoryCommon<mach_port_t>
+{
+public:
+ static void SetupMachMemory(pid_t pid,
+ ReceivePort* listen_port,
+ MachPortSender* listen_port_ack,
+ MachPortSender* send_port,
+ ReceivePort* send_port_ack,
+ bool pidIsParent);
+
+ static void CleanupForPid(pid_t pid);
+
+ static void Shutdown();
+
+ SharedMemoryBasic();
+
+ virtual bool SetHandle(const Handle& aHandle) override;
+
+ virtual bool Create(size_t aNbytes) override;
+
+ virtual bool Map(size_t nBytes) override;
+
+ virtual void CloseHandle() override;
+
+ virtual void* memory() const override
+ {
+ return mMemory;
+ }
+
+ virtual SharedMemoryType Type() const override
+ {
+ return TYPE_BASIC;
+ }
+
+ static Handle NULLHandle()
+ {
+ return Handle();
+ }
+
+
+ virtual bool IsHandleValid(const Handle &aHandle) const override;
+
+ virtual bool ShareToProcess(base::ProcessId aProcessId,
+ Handle* aNewHandle) override;
+
+private:
+ ~SharedMemoryBasic();
+
+ void Unmap();
+ mach_port_t mPort;
+ // Pointer to mapped region, null if unmapped.
+ void *mMemory;
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif // ifndef mozilla_ipc_SharedMemoryBasic_mach_h