Split atomic and mutex implementations and make inlinable.

include/config/SkUserConfig.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkUserConfig_DEFINED
@@ skipping 184 matching lines @@
 
 /* The PDF generation code uses Path Ops to generate inverse fills and complex
  * clipping paths, but at this time, Path Ops is not release ready yet. So,
  * the code is hidden behind this #define guard. If you are feeling adventurous
  * and want the latest and greatest PDF generation code, uncomment the #define.
  * When Path Ops is release ready, the define guards and this user config
  * define should be removed entirely.
  */
 //#define SK_PDF_USE_PATHOPS
 
+/* Skia uses these defines as the target of include preprocessor directives.
+ * The header files pointed to by these defines provide declarations and
+ * possibly inline implementations of threading primitives.
+ *
+ * See SkThread.h for documentation on what these includes must contain.
+ */
+//#define SK_ATOMICS_PLATFORM_H "SkAtomics_xxx.h"
+//#define SK_MUTEX_PLATFORM_H "SkMutex_xxx.h"
+
 #endif