Add resource tracking output and command buffer recycling

src/gpu/vk/GrVkResource.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrVkResource_DEFINED
 #define GrVkResource_DEFINED
 
 #include "SkAtomics.h"
 #include "SkTDynamicHash.h"
 #include "SkRandom.h"
 
 class GrVkGpu;
 
 // uncomment to enable tracing of resource refs
-//#ifdef SK_DEBUG
-//#define SK_TRACE_VK_RESOURCES
-//#endif
+#ifdef SK_DEBUG
+#define SK_TRACE_VK_RESOURCES
+#endif
 
 /** \class GrVkResource
 
   GrVkResource is the base class for Vulkan resources that may be shared by multiple
   objects. When an existing owner wants to share a reference, it calls ref().
   When an owner wants to release its reference, it calls unref(). When the
   shared object's reference count goes to zero as the result of an unref()
   call, its (virtual) destructor is called. It is an error for the
   destructor to be called explicitly (or via the object going out of scope on
   the stack or calling delete) if getRefCnt() > 1.
@@ skipping 83 matching lines @@
             this->internal_dispose();
         }
     }
 
 #ifdef SK_DEBUG
     void validate() const {
         SkASSERT(fRefCnt > 0);
     }
 #endif
 
+#ifdef SK_TRACE_VK_RESOURCES
+    /** Output a human-readable dump of this resource's information
+     */
+    virtual void dumpInfo() const = 0;
+#endif
+
 private:
     /** Must be implemented by any subclasses.
      *  Deletes any Vk data associated with this resource
      */
     virtual void freeGPUData(const GrVkGpu* gpu) const = 0;
 
     /** Must be overridden by subclasses that themselves store GrVkResources.
      *  Will unrefAndAbandon those resources without deleting the underlying Vk data
      */
     virtual void abandonSubResources() const {}
@@ skipping 27 matching lines @@
     mutable int32_t fRefCnt;
 #ifdef SK_TRACE_VK_RESOURCES
     uint32_t fKey;
 #endif
 
     typedef SkNoncopyable INHERITED;
 };
 
 
 #endif