Skip spinlock overhead on Android

src/gpu/GrProcessor.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrProcessor.h"
 #include "GrContext.h"
 #include "GrGeometryProcessor.h"
@@ skipping 66 matching lines @@
 
 
 // We use a global pool protected by a mutex(spinlock). Chrome may use the same GrContext on
 // different threads. The GrContext is not used concurrently on different threads and there is a
 // memory barrier between accesses of a context on different threads. Also, there may be multiple
 // GrContexts and those contexts may be in use concurrently on different threads.
 namespace {
 static SkSpinlock gProcessorSpinlock;
 class MemoryPoolAccessor {
 public:
+
+// We know in the Android framework there is only one GrContext.
+#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
+    MemoryPoolAccessor() {}
+    ~MemoryPoolAccessor() {}
+#else
     MemoryPoolAccessor() { gProcessorSpinlock.acquire(); }
-
     ~MemoryPoolAccessor() { gProcessorSpinlock.release(); }
+#endif
 
     GrMemoryPool* pool() const {
         static GrMemoryPool gPool(4096, 4096);
         return &gPool;
     }
 };
 }
 
 int32_t GrProcessor::gCurrProcessorClassID = GrProcessor::kIllegalProcessorClassID;
 
@@ skipping 34 matching lines @@
         }
     }
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 // Initial static variable from GrXPFactory
 int32_t GrXPFactory::gCurrXPFClassID =
         GrXPFactory::kIllegalXPFClassID;