dom/media/UnderrunHandler.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   4  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef MOZILLA_UNDERRUNHANDLER_H_
   7 #define MOZILLA_UNDERRUNHANDLER_H_
   8
   9 namespace mozilla {
  10 // Install an handler on SIGXPCU for the calling thread, that calls
  11 // `UnderrunHandler` when the soft real-time limit has been reached. If a
  12 // handler was already in place, this does nothing. No-op if not on Linux
  13 // Desktop.
  14 void InstallSoftRealTimeLimitHandler();
  15 // Query whether or not the soft-real-time limit has been reached. Always
  16 // false when not on Linux desktop. Can be called from any thread.
  17 bool SoftRealTimeLimitReached();
  18 // Set the calling thread to a normal scheduling class.
  19 void DemoteThreadFromRealTime();
  20 }  // namespace mozilla
  21
  22 #endif  // MOZILLA_UNDERRUNHANDLER_H_