forked from mirrors/gecko-dev
92497d5662
Differential Revision: https://phabricator.services.mozilla.com/D65499 --HG-- extra : moz-landing-system : lando
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=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 mozilla__CryptoTask_h
|
|
#define mozilla__CryptoTask_h
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsThreadUtils.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* Frequently we need to run a task on a background thread without blocking
|
|
* the main thread, and then call a callback on the main thread with the
|
|
* result. This class provides the framework for that. Subclasses must:
|
|
*
|
|
* (1) Override CalculateResult for the off-the-main-thread computation.
|
|
* (2) Override CallCallback() for the on-the-main-thread call of the
|
|
* callback.
|
|
*/
|
|
class CryptoTask : public Runnable {
|
|
public:
|
|
nsresult Dispatch();
|
|
|
|
protected:
|
|
CryptoTask() : Runnable("CryptoTask"), mRv(NS_ERROR_NOT_INITIALIZED) {}
|
|
|
|
virtual ~CryptoTask() = default;
|
|
|
|
/**
|
|
* Called on a background thread (never the main thread). Its result will be
|
|
* passed to CallCallback on the main thread.
|
|
*/
|
|
virtual nsresult CalculateResult() = 0;
|
|
|
|
/**
|
|
* Called on the main thread with the result from CalculateResult().
|
|
*/
|
|
virtual void CallCallback(nsresult rv) = 0;
|
|
|
|
private:
|
|
NS_IMETHOD Run() final;
|
|
|
|
nsresult mRv;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla__CryptoTask_h
|