utility_process_host_client.h revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_
6#define CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_
7
8#include "base/memory/ref_counted.h"
9#include "content/common/content_export.h"
10
11namespace IPC {
12class Message;
13}
14
15namespace content {
16
17// An interface to be implemented by consumers of the utility process to
18// get results back.  All functions are called on the thread passed along
19// to UtilityProcessHost.
20class UtilityProcessHostClient
21    : public base::RefCountedThreadSafe<UtilityProcessHostClient> {
22 public:
23  // Called when the process has crashed.
24  virtual void OnProcessCrashed(int exit_code) {}
25
26  // Called when the process fails to launch, i.e. it has no exit code.
27  virtual void OnProcessLaunchFailed() {}
28
29  // Allow the client to filter IPC messages.
30  virtual bool OnMessageReceived(const IPC::Message& message) = 0;
31
32 protected:
33  friend class base::RefCountedThreadSafe<UtilityProcessHostClient>;
34
35  virtual ~UtilityProcessHostClient() {}
36};
37
38};  // namespace content
39
40#endif  // CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_CLIENT_H_
41