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72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef GPU_COMMAND_BUFFER_SERVICE_SYNC_POINT_MANAGER_H_
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#define GPU_COMMAND_BUFFER_SERVICE_SYNC_POINT_MANAGER_H_
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#include <vector>
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#include "base/callback.h"
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#include "base/containers/hash_tables.h"
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#include "base/memory/ref_counted.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/synchronization/lock.h"
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#include "gpu/gpu_export.h"
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namespace base {
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class SequenceChecker;
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}
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namespace gpu {
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// This class manages the sync points, which allow cross-channel
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// synchronization.
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class GPU_EXPORT SyncPointManager
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: public base::RefCountedThreadSafe<SyncPointManager> {
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public:
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// InProcessCommandBuffer allows threaded calls since it can call into
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// SyncPointManager from client threads, or from multiple service threads
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// used in Android WebView.
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static SyncPointManager* Create(bool allow_threaded_calls);
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// Generates a sync point, returning its ID. This can me called on any thread.
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// IDs start at a random number. Never return 0.
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uint32 GenerateSyncPoint();
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// Retires a sync point. This will call all the registered callbacks for this
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// sync point. This can only be called on the main thread.
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void RetireSyncPoint(uint32 sync_point);
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// Adds a callback to the sync point. The callback will be called when the
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// sync point is retired, or immediately (from within that function) if the
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// sync point was already retired (or not created yet). This can only be
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// called on the main thread.
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void AddSyncPointCallback(uint32 sync_point, const base::Closure& callback);
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bool IsSyncPointRetired(uint32 sync_point);
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private:
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friend class base::RefCountedThreadSafe<SyncPointManager>;
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typedef std::vector<base::Closure> ClosureList;
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typedef base::hash_map<uint32, ClosureList> SyncPointMap;
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explicit SyncPointManager(bool allow_threaded_calls);
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~SyncPointManager();
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void CheckSequencedThread();
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scoped_ptr<base::SequenceChecker> sequence_checker_;
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// Protects the 2 fields below. Note: callbacks shouldn't be called with this
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// held.
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base::Lock lock_;
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SyncPointMap sync_point_map_;
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uint32 next_sync_point_;
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DISALLOW_COPY_AND_ASSIGN(SyncPointManager);
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};
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} // namespace gpu
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#endif // GPU_COMMAND_BUFFER_SERVICE_SYNC_POINT_MANAGER_H_
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