ios/web/public/web_thread_delegate.h

   1 // Copyright 2015 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 IOS_WEB_PUBLIC_WEB_THREAD_DELEGATE_H_
   6 #define IOS_WEB_PUBLIC_WEB_THREAD_DELEGATE_H_
   7
   8 namespace web {
   9
  10 // A class with this type may be registered via WebThread::SetDelegate.
  11 // TODO(stuartmorgan): Currently the above is not actually true; because
  12 // web can currently be build with either its own thread implementation, or
  13 // the content thread implementation, WebThread doesn't have SetDelegate
  14 // (since it can't be easily be passed through to BrowserThread::SetDelegate).
  15 // Once BrowserThread isn't being used by Chrome, SetDelegate will become
  16 // public.
  17 //
  18 // If registered as such, it will schedule to run Init() before the
  19 // message loop begins and the schedule InitAsync() as the first
  20 // task on its message loop (after the WebThread has done its own
  21 // initialization), and receive a CleanUp call right after the message
  22 // loop ends (and before the WebThread has done its own clean-up).
  23 class WebThreadDelegate {
  24  public:
  25   virtual ~WebThreadDelegate() {}
  26
  27   // Called prior to starting the message loop
  28   virtual void Init() = 0;
  29
  30   // Called as the first task on the thread's message loop.
  31   virtual void InitAsync() = 0;
  32
  33   // Called just after the message loop ends.
  34   virtual void CleanUp() = 0;
  35 };
  36
  37 }  // namespace web
  38
  39 #endif  // IOS_WEB_PUBLIC_WEB_THREAD_DELEGATE_H_