1 files changed, 115 insertions, 0 deletions
diff --git a/xpcom/threads/TimerThread.h b/xpcom/threads/TimerThread.h
new file mode 100644
index 000000000..a7204810a
--- /dev/null
+++ b/xpcom/threads/TimerThread.h
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TimerThread_h___
+#define TimerThread_h___
+
+#include "nsIObserver.h"
+#include "nsIRunnable.h"
+#include "nsIThread.h"
+
+#include "nsTimerImpl.h"
+#include "nsThreadUtils.h"
+
+#include "nsTArray.h"
+
+#include "mozilla/Atomics.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Monitor.h"
+
+namespace mozilla {
+class TimeStamp;
+} // namespace mozilla
+
+class TimerThread final
+  : public nsIRunnable
+  , public nsIObserver
+{
+public:
+  typedef mozilla::Monitor Monitor;
+  typedef mozilla::TimeStamp TimeStamp;
+  typedef mozilla::TimeDuration TimeDuration;
+
+  TimerThread();
+  nsresult InitLocks();
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIRUNNABLE
+  NS_DECL_NSIOBSERVER
+
+  nsresult Init();
+  nsresult Shutdown();
+
+  nsresult AddTimer(nsTimerImpl* aTimer);
+  nsresult RemoveTimer(nsTimerImpl* aTimer);
+
+  void DoBeforeSleep();
+  void DoAfterSleep();
+
+  bool IsOnTimerThread() const
+  {
+    return mThread == NS_GetCurrentThread();
+  }
+
+private:
+  ~TimerThread();
+
+  mozilla::Atomic<bool> mInitInProgress;
+  bool    mInitialized;
+
+  // These two internal helper methods must be called while mMonitor is held.
+  // AddTimerInternal returns the position where the timer was added in the
+  // list, or -1 if it failed.
+  int32_t AddTimerInternal(nsTimerImpl* aTimer);
+  bool    RemoveTimerInternal(nsTimerImpl* aTimer);
+  void    ReleaseTimerInternal(nsTimerImpl* aTimer);
+
+  already_AddRefed<nsTimerImpl> PostTimerEvent(already_AddRefed<nsTimerImpl> aTimerRef);
+
+  nsCOMPtr<nsIThread> mThread;
+  Monitor mMonitor;
+
+  bool mShutdown;
+  bool mWaiting;
+  bool mNotified;
+  bool mSleeping;
+
+  nsTArray<nsTimerImpl*> mTimers;
+};
+
+struct TimerAdditionComparator
+{
+  TimerAdditionComparator(const mozilla::TimeStamp& aNow,
+                          nsTimerImpl* aTimerToInsert) :
+    now(aNow)
+#ifdef DEBUG
+    , timerToInsert(aTimerToInsert)
+#endif
+  {
+  }
+
+  bool LessThan(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
+  {
+    MOZ_ASSERT(aNewTimer == timerToInsert, "Unexpected timer ordering");
+
+    // Skip any overdue timers.
+    return aFromArray->mTimeout <= now ||
+           aFromArray->mTimeout <= aNewTimer->mTimeout;
+  }
+
+  bool Equals(nsTimerImpl* aFromArray, nsTimerImpl* aNewTimer) const
+  {
+    return false;
+  }
+
+private:
+  const mozilla::TimeStamp& now;
+#ifdef DEBUG
+  const nsTimerImpl* const timerToInsert;
+#endif
+};
+
+#endif /* TimerThread_h___ */