1 files changed, 72 insertions, 0 deletions
diff --git a/ipc/glue/SharedMemoryBasic_android.h b/ipc/glue/SharedMemoryBasic_android.h
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+++ b/ipc/glue/SharedMemoryBasic_android.h
@@ -0,0 +1,72 @@
+/* -*- 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_android_h
+#define mozilla_ipc_SharedMemoryBasic_android_h
+
+#include "base/file_descriptor_posix.h"
+
+#include "SharedMemory.h"
+
+//
+// This is a low-level wrapper around platform shared memory.  Don't
+// use it directly; use Shmem allocated through IPDL interfaces.
+//
+
+namespace mozilla {
+namespace ipc {
+
+class SharedMemoryBasic final : public SharedMemoryCommon<base::FileDescriptor>
+{
+public:
+  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
+  {
+    return aHandle.fd >= 0;
+  }
+
+  virtual bool ShareToProcess(base::ProcessId aProcessId,
+                              Handle* aNewHandle) override;
+
+private:
+  ~SharedMemoryBasic();
+
+  void Unmap();
+
+  // The /dev/ashmem fd we allocate.
+  int mShmFd;
+  // Pointer to mapped region, null if unmapped.
+  void *mMemory;
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif // ifndef mozilla_ipc_SharedMemoryBasic_android_h