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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/process.h"
+
+#include "mozilla/UniquePtrExtensions.h"
+#include "mozilla/ipc/SharedMemory.h"
+#include <mach/port.h>
+
+#ifdef FUZZING
+# include "mozilla/ipc/SharedMemoryFuzzer.h"
+#endif
+
+//
+// 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<mozilla::UniqueMachSendRight> {
+ public:
+ SharedMemoryBasic();
+
+ virtual bool SetHandle(Handle aHandle, OpenRights aRights) override;
+
+ virtual bool Create(size_t aNbytes) override;
+
+ virtual bool Map(size_t nBytes, void* fixed_address = nullptr) override;
+
+ virtual void Unmap() override;
+
+ virtual void CloseHandle() override;
+
+ virtual void* memory() const override {
+#ifdef FUZZING
+ return SharedMemoryFuzzer::MutateSharedMemory(mMemory, mAllocSize);
+#else
+ return mMemory;
+#endif
+ }
+
+ static Handle NULLHandle() { return Handle(); }
+
+ static void* FindFreeAddressSpace(size_t aSize);
+
+ virtual bool IsHandleValid(const Handle& aHandle) const override;
+
+ virtual Handle CloneHandle() override;
+
+ private:
+ ~SharedMemoryBasic();
+
+ mozilla::UniqueMachSendRight mPort;
+ // Pointer to mapped region, null if unmapped.
+ void* mMemory;
+ // Access rights to map an existing region with.
+ OpenRights mOpenRights;
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif // ifndef mozilla_ipc_SharedMemoryBasic_mach_h