gpu: GPU service scheduler.

gpu/command_buffer/client/context_support.h

 // Copyright 2013 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 GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_
 #define GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/callback.h"
 #include "ui/gfx/overlay_transform.h"
 
 namespace gfx {
 class Rect;
 class RectF;
 }
 
 namespace ui {
 class LatencyInfo;
 }
 
 namespace gpu {
 
 struct SyncToken;
 
 class ContextSupport {
  public:
+  virtual void EnsureWorkVisibleAsync() = 0;

[piman, 2017/05/09 00:48:38]

nit: please provide documentation. In particular, why having this instead of
just calling Flush? Is it for the thread-safety?

[sunnyps, 2017/05/10 23:15:15]

Sorry, I will split this out into a separate CL. I only included this because I
wanted to run telemetry trybots which doesn't play well with dependent patchsets
AFAIK.

I want to add a thread-safe Flush that flushes the last ordering barrier for the
worker stream. Not 100% sure how to expose it though.

+
   // Runs |callback| when the given sync token is signalled. The sync token may
   // belong to any context.
   virtual void SignalSyncToken(const SyncToken& sync_token,
                                const base::Closure& callback) = 0;
 
   // Returns true if the given sync token has been signaled. The sync token must
   // belong to this context. This may be called from any thread.
   virtual bool IsSyncTokenSignaled(const SyncToken& sync_token) = 0;
 
   // Runs |callback| when a query created via glCreateQueryEXT() has cleared
@@ skipping 34 matching lines @@
       const std::vector<ui::LatencyInfo>& latency_info) = 0;
 
  protected:
   ContextSupport() {}
   virtual ~ContextSupport() {}
 };
 
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_