content/public/browser/utility_process_host_client.h

   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
  11 namespace IPC {
  12 class Message;
  13 }
  14
  15 namespace 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.
  20 class 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_