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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_WORKER_HOST_WORKER_SERVICE_H_
#define CONTENT_BROWSER_WORKER_HOST_WORKER_SERVICE_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/singleton.h"
#include "base/observer_list.h"
#include "base/threading/non_thread_safe.h"
#include "content/browser/worker_host/worker_process_host.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/worker_service.h"
class GURL;
struct ViewHostMsg_CreateWorker_Params;
namespace content {
class ResourceContext;
class WorkerServiceObserver;
class WorkerStoragePartition;
class WorkerPrioritySetter;
class CONTENT_EXPORT WorkerServiceImpl
: public NON_EXPORTED_BASE(WorkerService) {
public:
// Returns the WorkerServiceImpl singleton.
static WorkerServiceImpl* GetInstance();
// Releases the priority setter to avoid memory leak error.
void PerformTeardownForTesting();
// WorkerService implementation:
virtual bool TerminateWorker(int process_id, int route_id) OVERRIDE;
virtual std::vector<WorkerInfo> GetWorkers() OVERRIDE;
virtual void AddObserver(WorkerServiceObserver* observer) OVERRIDE;
virtual void RemoveObserver(WorkerServiceObserver* observer) OVERRIDE;
// These methods correspond to worker related IPCs.
void CreateWorker(const ViewHostMsg_CreateWorker_Params& params,
int route_id,
WorkerMessageFilter* filter,
ResourceContext* resource_context,
const WorkerStoragePartition& worker_partition);
void LookupSharedWorker(const ViewHostMsg_CreateWorker_Params& params,
int route_id,
WorkerMessageFilter* filter,
ResourceContext* resource_context,
const WorkerStoragePartition& worker_partition,
bool* exists,
bool* url_error);
void ForwardToWorker(const IPC::Message& message,
WorkerMessageFilter* filter);
void DocumentDetached(unsigned long long document_id,
WorkerMessageFilter* filter);
void OnWorkerMessageFilterClosing(WorkerMessageFilter* filter);
int next_worker_route_id() { return ++next_worker_route_id_; }
// Given a worker's process id, return the IDs of the renderer process and
// render frame that created it. For shared workers, this returns the first
// parent.
// TODO(dimich): This code assumes there is 1 worker per worker process, which
// is how it is today until V8 can run in separate threads.
bool GetRendererForWorker(int worker_process_id,
int* render_process_id,
int* render_frame_id) const;
const WorkerProcessHost::WorkerInstance* FindWorkerInstance(
int worker_process_id);
void NotifyWorkerDestroyed(
WorkerProcessHost* process,
int worker_route_id);
void NotifyWorkerProcessCreated();
// Used when we run each worker in a separate process.
static const int kMaxWorkersWhenSeparate;
static const int kMaxWorkersPerFrameWhenSeparate;
private:
friend struct DefaultSingletonTraits<WorkerServiceImpl>;
WorkerServiceImpl();
virtual ~WorkerServiceImpl();
// Given a WorkerInstance, create an associated worker process.
bool CreateWorkerFromInstance(WorkerProcessHost::WorkerInstance instance);
// Checks if we can create a worker process based on the process limit when
// we're using a strategy of one process per core.
bool CanCreateWorkerProcess(
const WorkerProcessHost::WorkerInstance& instance);
// Checks if the frame associated with the passed RenderFrame can create a
// worker process based on the process limit when we're using a strategy of
// one worker per process.
bool FrameCanCreateWorkerProcess(
int render_process_id, int render_frame_id, bool* hit_total_worker_limit);
// Tries to see if any of the queued workers can be created.
void TryStartingQueuedWorker();
// APIs for manipulating our set of pending shared worker instances.
WorkerProcessHost::WorkerInstance* CreatePendingInstance(
const GURL& url,
const base::string16& name,
ResourceContext* resource_context,
const WorkerStoragePartition& worker_partition);
WorkerProcessHost::WorkerInstance* FindPendingInstance(
const GURL& url,
const base::string16& name,
const WorkerStoragePartition& worker_partition,
ResourceContext* resource_context);
void RemovePendingInstances(
const GURL& url,
const base::string16& name,
const WorkerStoragePartition& worker_partition,
ResourceContext* resource_context);
WorkerProcessHost::WorkerInstance* FindSharedWorkerInstance(
const GURL& url,
const base::string16& name,
const WorkerStoragePartition& worker_partition,
ResourceContext* resource_context);
scoped_refptr<WorkerPrioritySetter> priority_setter_;
int next_worker_route_id_;
WorkerProcessHost::Instances queued_workers_;
// These are shared workers that have been looked up, but not created yet.
// We need to keep a list of these to synchronously detect shared worker
// URL mismatches when two pages launch shared workers simultaneously.
WorkerProcessHost::Instances pending_shared_workers_;
ObserverList<WorkerServiceObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(WorkerServiceImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_WORKER_HOST_WORKER_SERVICE_H_
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