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      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_
     41