diff -r 000000000000 -r 6474c204b198 security/manager/ssl/src/nsPSMBackgroundThread.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/manager/ssl/src/nsPSMBackgroundThread.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* 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 _NSPSMBACKGROUNDTHREAD_H_
+#define _NSPSMBACKGROUNDTHREAD_H_
+
+#include "nspr.h"
+#include "nscore.h"
+#include "mozilla/CondVar.h"
+#include "mozilla/Mutex.h"
+#include "nsNSSComponent.h"
+
+class nsPSMBackgroundThread
+{
+protected:
+  static void nsThreadRunner(void *arg);
+  virtual void Run(void) = 0;
+
+  // used to join the thread
+  PRThread *mThreadHandle;
+
+  // Shared mutex used for condition variables,
+  // and to protect access to mExitState.
+  // Derived classes may use it to protect additional
+  // resources.
+  mozilla::Mutex mMutex;
+
+  // Used to signal the thread's Run loop when a job is added 
+  // and/or exit is requested.
+  mozilla::CondVar mCond;
+
+  bool exitRequested(::mozilla::MutexAutoLock const & proofOfLock) const;
+  bool exitRequestedNoLock() const { return mExitState != ePSMThreadRunning; }
+  nsresult postStoppedEventToMainThread(::mozilla::MutexAutoLock const & proofOfLock);
+
+private:
+  enum {
+    ePSMThreadRunning = 0,
+    ePSMThreadStopRequested = 1,
+    ePSMThreadStopped = 2
+  } mExitState;
+
+  // The thread's name.
+  nsCString mName;
+
+public:
+  nsPSMBackgroundThread();
+  virtual ~nsPSMBackgroundThread();
+
+  nsresult startThread(const nsCSubstring & name);
+  void requestExit();
+};
+
+
+#endif