third_party/WebKit/Source/core/workers/DedicatedWorkerThread.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "core/workers/DedicatedWorkerThread.h"

#include <memory>
#include <utility>

#include "base/memory/ptr_util.h"
#include "core/dom/Document.h"
#include "core/execution_context/ExecutionContext.h"
#include "core/frame/LocalFrame.h"
#include "core/workers/DedicatedWorkerGlobalScope.h"
#include "core/workers/DedicatedWorkerObjectProxy.h"
#include "core/workers/GlobalScopeCreationParams.h"
#include "core/workers/WorkerBackingThread.h"

namespace blink {

namespace {

FrameScheduler* GetFrameScheduler(ThreadableLoadingContext* loading_context) {
  // |loading_context| can be null in unittests.
  if (!loading_context)
    return nullptr;
  if (!loading_context->GetExecutionContext()->IsDocument())
    return nullptr;
  return ToDocument(loading_context->GetExecutionContext())
      ->GetFrame()
      ->GetFrameScheduler();
}

}  // namespace

std::unique_ptr<DedicatedWorkerThread> DedicatedWorkerThread::Create(
    ThreadableLoadingContext* loading_context,
    DedicatedWorkerObjectProxy& worker_object_proxy) {
  return base::WrapUnique(
      new DedicatedWorkerThread(loading_context, worker_object_proxy));
}

DedicatedWorkerThread::DedicatedWorkerThread(
    ThreadableLoadingContext* loading_context,
    DedicatedWorkerObjectProxy& worker_object_proxy)
    : WorkerThread(loading_context, worker_object_proxy),
      worker_backing_thread_(WorkerBackingThread::Create(
          WebThreadCreationParams(GetThreadType())
              .SetFrameScheduler(GetFrameScheduler(loading_context)))),
      worker_object_proxy_(worker_object_proxy) {}

DedicatedWorkerThread::~DedicatedWorkerThread() = default;

void DedicatedWorkerThread::ClearWorkerBackingThread() {
  worker_backing_thread_ = nullptr;
}

WorkerOrWorkletGlobalScope* DedicatedWorkerThread::CreateWorkerGlobalScope(
    std::unique_ptr<GlobalScopeCreationParams> creation_params) {
  return new DedicatedWorkerGlobalScope(std::move(creation_params), this,
                                        time_origin_);
}

}  // namespace blink