move SK_MMAP_SUPPORT into SkPreConfig, so we can know about its availability

trunk/include/core/SkData.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 71 matching lines @@
     static SkData* NewWithProc(const void* data, size_t length,
                                ReleaseProc proc, void* context);
 
     /**
      *  Create a new dataref from a pointer allocated by malloc. The Data object
      *  takes ownership of that allocation, and will handling calling sk_free.
      */
     static SkData* NewFromMalloc(const void* data, size_t length);
 
     /**
+     *  Create a new dataref from a pointer allocated by mmap. The Data object
+     *  will handle calling munmap().
+     */
+    static SkData* NewFromMMap(const void* data, size_t length);
+    
+    /**
      *  Create a new dataref using a subset of the data in the specified
      *  src dataref.
      */
     static SkData* NewSubset(const SkData* src, size_t offset, size_t length);
 
     /**
      *  Returns a new empty dataref (or a reference to a shared empty dataref).
      *  New or shared, the caller must see that unref() is eventually called.
      */
     static SkData* NewEmpty();
@@ skipping 45 matching lines @@
     }
 
     SkData *operator->() const { return fRef; }
     operator SkData*() { return fRef; }
 
 private:
     SkData*     fRef;
 };
 
 #endif