blob: 8da085b51b0f7497671940076adb5835014d6c2e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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_dom_workers_WorkerThread_h__
#define mozilla_dom_workers_WorkerThread_h__
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/CondVar.h"
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/SafeRefPtr.h"
#include "nsISupports.h"
#include "nsThread.h"
#include "nscore.h"
class nsIRunnable;
namespace mozilla {
class Runnable;
namespace dom {
class WorkerRunnable;
class WorkerPrivate;
namespace workerinternals {
class RuntimeService;
}
// This class lets us restrict the public methods that can be called on
// WorkerThread to RuntimeService and WorkerPrivate without letting them gain
// full access to private methods (as would happen if they were simply friends).
class WorkerThreadFriendKey {
friend class workerinternals::RuntimeService;
friend class WorkerPrivate;
WorkerThreadFriendKey();
~WorkerThreadFriendKey();
};
class WorkerThread final : public nsThread {
class Observer;
Mutex mLock MOZ_UNANNOTATED;
CondVar mWorkerPrivateCondVar;
// Protected by nsThread::mLock.
WorkerPrivate* mWorkerPrivate;
// Only touched on the target thread.
RefPtr<Observer> mObserver;
// Protected by nsThread::mLock and waited on with mWorkerPrivateCondVar.
uint32_t mOtherThreadsDispatchingViaEventTarget;
#ifdef DEBUG
// Protected by nsThread::mLock.
bool mAcceptingNonWorkerRunnables;
#endif
// Using this struct we restrict access to the constructor while still being
// able to use MakeSafeRefPtr.
struct ConstructorKey {};
public:
explicit WorkerThread(ConstructorKey);
static SafeRefPtr<WorkerThread> Create(const WorkerThreadFriendKey& aKey);
void SetWorker(const WorkerThreadFriendKey& aKey,
WorkerPrivate* aWorkerPrivate);
// This method is used to decouple the connection with the WorkerPrivate which
// is set in SetWorker(). And it also clears all pending runnables on this
// WorkerThread.
// After decoupling, WorkerThreadRunnable can not run on this WorkerThread
// anymore, since WorkerPrivate is invalid.
void ClearEventQueueAndWorker(const WorkerThreadFriendKey& aKey);
nsresult DispatchPrimaryRunnable(const WorkerThreadFriendKey& aKey,
already_AddRefed<nsIRunnable> aRunnable);
nsresult DispatchAnyThread(const WorkerThreadFriendKey& aKey,
already_AddRefed<WorkerRunnable> aWorkerRunnable);
uint32_t RecursionDepth(const WorkerThreadFriendKey& aKey) const;
// Override HasPendingEvents to allow HasPendingEvents could be accessed by
// the parent thread. WorkerPrivate::IsEligibleForCC calls this method on the
// parent thread to check if there is any pending events on the worker thread.
NS_IMETHOD HasPendingEvents(bool* aHasPendingEvents) override;
NS_INLINE_DECL_REFCOUNTING_INHERITED(WorkerThread, nsThread)
private:
~WorkerThread();
// This should only be called by consumers that have an
// nsIEventTarget/nsIThread pointer.
NS_IMETHOD
Dispatch(already_AddRefed<nsIRunnable> aRunnable, uint32_t aFlags) override;
NS_IMETHOD
DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags) override;
NS_IMETHOD
DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t) override;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_workers_WorkerThread_h__
|
