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Side by Side Diff: cc/scoped_thread_proxy.h

Issue 11189043: cc: Rename cc classes and members to match filenames (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 2 months ago
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1 // Copyright 2011 The Chromium Authors. All rights reserved. 1 // Copyright 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CCScopedThreadProxy_h 5 #ifndef CCScopedThreadProxy_h
6 #define CCScopedThreadProxy_h 6 #define CCScopedThreadProxy_h
7 7
8 #include "CCThreadTask.h" 8 #include "CCThreadTask.h"
9 #include "base/threading/platform_thread.h" 9 #include "base/threading/platform_thread.h"
10 #include <wtf/OwnPtr.h> 10 #include <wtf/OwnPtr.h>
11 #include <wtf/PassOwnPtr.h> 11 #include <wtf/PassOwnPtr.h>
12 #include <wtf/ThreadSafeRefCounted.h> 12 #include <wtf/ThreadSafeRefCounted.h>
13 13
14 namespace cc { 14 namespace cc {
15 15
16 // This class is a proxy used to post tasks to an target thread from any other t hread. The proxy may be shut down at 16 // This class is a proxy used to post tasks to an target thread from any other t hread. The proxy may be shut down at
17 // any point from the target thread after which no more tasks posted to the prox y will run. In other words, all 17 // any point from the target thread after which no more tasks posted to the prox y will run. In other words, all
18 // tasks posted via a proxy are scoped to the lifecycle of the proxy. Use this w hen posting tasks to an object that 18 // tasks posted via a proxy are scoped to the lifecycle of the proxy. Use this w hen posting tasks to an object that
19 // might die with tasks in flight. 19 // might die with tasks in flight.
20 // 20 //
21 // The proxy must be created and shut down from the target thread, tasks may be posted from any thread. 21 // The proxy must be created and shut down from the target thread, tasks may be posted from any thread.
22 // 22 //
23 // Implementation note: Unlike ScopedRunnableMethodFactory in Chromium, pending tasks are not cancelled by actually 23 // Implementation note: Unlike ScopedRunnableMethodFactory in Chromium, pending tasks are not cancelled by actually
24 // destroying the proxy. Instead each pending task holds a reference to the prox y to avoid maintaining an explicit 24 // destroying the proxy. Instead each pending task holds a reference to the prox y to avoid maintaining an explicit
25 // list of outstanding tasks. 25 // list of outstanding tasks.
26 class CCScopedThreadProxy : public ThreadSafeRefCounted<CCScopedThreadProxy> { 26 class ScopedThreadProxy : public ThreadSafeRefCounted<ScopedThreadProxy> {
27 public: 27 public:
28 static PassRefPtr<CCScopedThreadProxy> create(CCThread* targetThread) 28 static PassRefPtr<ScopedThreadProxy> create(Thread* targetThread)
29 { 29 {
30 ASSERT(base::PlatformThread::CurrentId() == targetThread->threadID()); 30 ASSERT(base::PlatformThread::CurrentId() == targetThread->threadID());
31 return adoptRef(new CCScopedThreadProxy(targetThread)); 31 return adoptRef(new ScopedThreadProxy(targetThread));
32 } 32 }
33 33
34 ~CCScopedThreadProxy(); 34 ~ScopedThreadProxy();
35 35
36 // Can be called from any thread. Posts a task to the target thread that run s unless 36 // Can be called from any thread. Posts a task to the target thread that run s unless
37 // shutdown() is called before it runs. 37 // shutdown() is called before it runs.
38 void postTask(PassOwnPtr<CCThread::Task> task) 38 void postTask(PassOwnPtr<Thread::Task> task)
39 { 39 {
40 ref(); 40 ref();
41 m_targetThread->postTask(createCCThreadTask(this, &CCScopedThreadProxy:: runTaskIfNotShutdown, task)); 41 m_targetThread->postTask(createThreadTask(this, &ScopedThreadProxy::runT askIfNotShutdown, task));
42 } 42 }
43 43
44 void shutdown() 44 void shutdown()
45 { 45 {
46 ASSERT(base::PlatformThread::CurrentId() == m_targetThread->threadID()); 46 ASSERT(base::PlatformThread::CurrentId() == m_targetThread->threadID());
47 ASSERT(!m_shutdown); 47 ASSERT(!m_shutdown);
48 m_shutdown = true; 48 m_shutdown = true;
49 } 49 }
50 50
51 private: 51 private:
52 explicit CCScopedThreadProxy(CCThread* targetThread); 52 explicit ScopedThreadProxy(Thread* targetThread);
53 53
54 void runTaskIfNotShutdown(PassOwnPtr<CCThread::Task> popTask) 54 void runTaskIfNotShutdown(PassOwnPtr<Thread::Task> popTask)
55 { 55 {
56 OwnPtr<CCThread::Task> task = popTask; 56 OwnPtr<Thread::Task> task = popTask;
57 // If our shutdown flag is set, it's possible that m_targetThread has al ready been destroyed so don't 57 // If our shutdown flag is set, it's possible that m_targetThread has al ready been destroyed so don't
58 // touch it. 58 // touch it.
59 if (m_shutdown) { 59 if (m_shutdown) {
60 deref(); 60 deref();
61 return; 61 return;
62 } 62 }
63 ASSERT(base::PlatformThread::CurrentId() == m_targetThread->threadID()); 63 ASSERT(base::PlatformThread::CurrentId() == m_targetThread->threadID());
64 task->performTask(); 64 task->performTask();
65 deref(); 65 deref();
66 } 66 }
67 67
68 CCThread* m_targetThread; 68 Thread* m_targetThread;
69 bool m_shutdown; // Only accessed on the target thread 69 bool m_shutdown; // Only accessed on the target thread
70 }; 70 };
71 71
72 } 72 }
73 73
74 #endif 74 #endif
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