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 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #ifndef CHROME_COMMON_PROCESS_WATCHER_H_

 #define CHROME_COMMON_PROCESS_WATCHER_H_

 #include "base/basictypes.h"

 #include "base/process_util.h"

 class ProcessWatcher {

  public:

   // This method ensures that the specified process eventually terminates, and

   // then it closes the given process handle.

   //

   // It assumes that the process has already been signalled to exit, and it

   // begins by waiting a small amount of time for it to exit.  If the process

   // does not appear to have exited, then this function starts to become

   // aggressive about ensuring that the process terminates.

   //

   // This method does not block the calling thread.

   //

   // NOTE: The process handle must have been opened with the PROCESS_TERMINATE

   // and SYNCHRONIZE permissions.

   //

   static void EnsureProcessTerminated(base::ProcessHandle process_handle

                                       , bool force=true

   );

  private:

   // Do not instantiate this class.

   ProcessWatcher();

   DISALLOW_COPY_AND_ASSIGN(ProcessWatcher);

 };

 #endif  // CHROME_COMMON_PROCESS_WATCHER_H_