chrome/renderer/pepper/pepper_shared_memory_message_filter.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_RENDERER_PEPPER_PEPPER_SHARED_MEMORY_MESSAGE_FILTER_H_
#define CHROME_RENDERER_PEPPER_PEPPER_SHARED_MEMORY_MESSAGE_FILTER_H_

#include <stdint.h>

#include "base/memory/raw_ptr.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/host/instance_message_filter.h"

namespace content {
class RendererPpapiHost;
}

namespace ppapi {
namespace proxy {
class SerializedHandle;
}
}

// Implements the backend for shared memory messages from a plugin process.
class PepperSharedMemoryMessageFilter
    : public ppapi::host::InstanceMessageFilter {
 public:
  explicit PepperSharedMemoryMessageFilter(content::RendererPpapiHost* host);

  PepperSharedMemoryMessageFilter(const PepperSharedMemoryMessageFilter&) =
      delete;
  PepperSharedMemoryMessageFilter& operator=(
      const PepperSharedMemoryMessageFilter&) = delete;

  ~PepperSharedMemoryMessageFilter() override;

  // InstanceMessageFilter:
  bool OnInstanceMessageReceived(const IPC::Message& msg) override;

  bool Send(IPC::Message* msg);

 private:
  // Message handlers.
  void OnHostMsgCreateSharedMemory(
      PP_Instance instance,
      uint32_t size,
      int* host_shm_handle_id,
      ppapi::proxy::SerializedHandle* plugin_shm_handle);

  raw_ptr<content::RendererPpapiHost> host_;
};

#endif  // CHROME_RENDERER_PEPPER_PEPPER_SHARED_MEMORY_MESSAGE_FILTER_H_