Mandoline: Merge Surfaces and Views apps

components/view_manager/surfaces/surfaces_state.h

Index: components/view_manager/surfaces/surfaces_state.h
diff --git a/components/view_manager/surfaces/surfaces_state.h b/components/view_manager/surfaces/surfaces_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..b6d1bf1030edaea4d6727055ad72a0626ca2f91d
--- /dev/null
+++ b/components/view_manager/surfaces/surfaces_state.h
@@ -0,0 +1,46 @@
+// Copyright 2015 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 COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_
+#define COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/surfaces/surface_manager.h"
+#include "components/view_manager/surfaces/surfaces_scheduler.h"
+
+namespace cc {
+class SurfaceManager;
+}  // namespace cc
+
+namespace surfaces {
+
+// The SurfacesState object is an object global to the View Manager app that
+// holds the SurfaceManager, SurfacesScheduler and allocates new Surfaces
+// namespaces.

[rjkroege, 2015/08/06 22:39:11]

can you say what thread it lives on

[Fady Samuel, 2015/08/07 01:15:21]

Done.

+class SurfacesState : public base::RefCounted<SurfacesState> {

[rjkroege, 2015/08/06 22:39:11]

if it's only on one thread and you pass it around, why refcount?

[Fady Samuel, 2015/08/07 01:15:21]

It might be possible to get away with not doing that. It makes it easier to
reason about lifetime, but really I'm just being lazy. I could make it not
refcounted.

+ public:
+  SurfacesState();
+
+  uint32_t next_id_namespace() { return next_id_namespace_++; }
+
+  cc::SurfaceManager* manager() { return &manager_; }
+
+  SurfacesScheduler* scheduler() { return &scheduler_; }
+
+ private:
+  friend class base::RefCounted<SurfacesState>;
+  ~SurfacesState();
+
+  // A Surface ID is an unsigned 64-bit int where the high 32-bits are generated
+  // by the Surfaces service, and the low 32-bits are generated by the process
+  // that requested the Surface.
+  uint32_t next_id_namespace_;
+  cc::SurfaceManager manager_;
+  SurfacesScheduler scheduler_;
+};
+
+}  // namespace surfaces
+
+#endif  //  COMPONENTS_VIEW_MANAGER_SURFACES_SURFACES_STATE_H_