Global GPU memory manager for android webview

android_webview/browser/tile_resource_consumer.h

+// Copyright 2014 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 ANDROID_WEBVIEW_BROWSER_TILE_RESOURCE_CONSUMER_H_
+#define ANDROID_WEBVIEW_BROWSER_TILE_RESOURCE_CONSUMER_H_
+
+namespace android_webview {
+// TileResourceConsumer is a class that requests tile resources from
+// GlobalTileManager.
+class TileResourceConsumer {

[boliu, 2014/04/28 22:22:15]

Call this GlobalTileManagerClient

[hush (inactive), 2014/04/30 20:50:17]

Done.

+ public:
+  virtual size_t CalculateTileRequest() = 0;

[boliu, 2014/04/28 22:22:15]

const

[hush (inactive), 2014/04/30 20:50:17]

Done.

+  virtual size_t ForceDropTiles() = 0;
+  virtual bool IsStarved() = 0;

[boliu, 2014/04/28 22:22:15]

Not needed

[hush (inactive), 2014/04/30 20:50:17]

Actually, we need a function for the client to tell the manager that if the
request is unmet, the manager needs to force drop tiles of other clients to *try
to* satisfy the requesting client. (it is okay that the manager still fails to
satisfy the request, after the manager evicts all other clients)
This function does not need to have the notion of "starvation", but it needs to
indicate that the requesting client wants the manager to evict.
So I will rename this function to "NeedsEviction". How does that sound?

+  virtual ~TileResourceConsumer() {}

[boliu, 2014/04/28 22:22:15]

In protected section

[hush (inactive), 2014/04/30 20:50:17]

Done.

+};
+
+} // namespace android_webview
+
+#endif

[boliu, 2014/04/28 22:22:15]

comment on endif (yes I know, stupid...)

[hush (inactive), 2014/04/30 20:50:17]

Done.