1 files changed, 75 insertions, 0 deletions
diff --git a/ipc/glue/SharedMemoryBasic_mach.h b/ipc/glue/SharedMemoryBasic_mach.h
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+++ b/ipc/glue/SharedMemoryBasic_mach.h
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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