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/* 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 PSMRunnable_h
#define PSMRunnable_h

#include "mozilla/Monitor.h"
#include "nsThreadUtils.h"
#include "nsIObserver.h"
#include "nsProxyRelease.h"

namespace mozilla {
namespace psm {

// Wait for the event to run on the target thread without spinning the event
// loop on the calling thread. (Dispatching events to a thread using
// NS_DISPATCH_SYNC would cause the event loop on the calling thread to spin.)
class SyncRunnableBase : public Runnable {
 public:
  NS_DECL_NSIRUNNABLE
  nsresult DispatchToMainThreadAndWait();

 protected:
  SyncRunnableBase();
  virtual void RunOnTargetThread() = 0;

 private:
  mozilla::Monitor monitor;
};

class NotifyObserverRunnable : public Runnable {
 public:
  NotifyObserverRunnable(nsIObserver* observer, const char* topicStringLiteral)
      : Runnable("psm::NotifyObserverRunnable"),
        mObserver(new nsMainThreadPtrHolder<nsIObserver>(
            "psm::NotifyObserverRunnable::mObserver", observer)),
        mTopic(topicStringLiteral) {}
  NS_DECL_NSIRUNNABLE
 private:
  nsMainThreadPtrHandle<nsIObserver> mObserver;
  const char* const mTopic;
};

}  // namespace psm
}  // namespace mozilla

#endif