SkTArray to move when moving.

include/core/SkTArray.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.
  */
 
 #ifndef SkTArray_DEFINED
 #define SkTArray_DEFINED
 
+#include "../private/SkTLogic.h"
 #include "../private/SkTemplates.h"
 #include "SkTypes.h"
 
 #include <new>
 #include <utility>
 
 template <typename T, bool MEM_COPY = false> class SkTArray;
-
-namespace SkTArrayExt {
-
-template<typename T>
-inline void copy(SkTArray<T, true>* self, int dst, int src) {
-    memcpy(&self->fItemArray[dst], &self->fItemArray[src], sizeof(T));
-}
-template<typename T>
-inline void copy(SkTArray<T, true>* self, const T* array) {
-    sk_careful_memcpy(self->fMemArray, array, self->fCount * sizeof(T));
-}
-template<typename T>
-inline void copyAndDelete(SkTArray<T, true>* self, char* newMemArray) {
-    sk_careful_memcpy(newMemArray, self->fMemArray, self->fCount * sizeof(T));
-}
-
-template<typename T>
-inline void copy(SkTArray<T, false>* self, int dst, int src) {
-    new (&self->fItemArray[dst]) T(self->fItemArray[src]);
-}
-template<typename T>
-inline void copy(SkTArray<T, false>* self, const T* array) {
-    for (int i = 0; i < self->fCount; ++i) {
-        new (self->fItemArray + i) T(array[i]);
-    }
-}
-template<typename T>
-inline void copyAndDelete(SkTArray<T, false>* self, char* newMemArray) {
-    for (int i = 0; i < self->fCount; ++i) {
-        new (newMemArray + sizeof(T) * i) T(self->fItemArray[i]);
-        self->fItemArray[i].~T();
-    }
-}
-
-}
-
 template <typename T, bool MEM_COPY> void* operator new(size_t, SkTArray<T, MEM_COPY>*, int);
 
 /** When MEM_COPY is true T will be bit copied when moved.
     When MEM_COPY is false, T will be copy constructed / destructed.
     In all cases T will be default-initialized on allocation,
     and its destructor will be called from this object's destructor.
 */
 template <typename T, bool MEM_COPY> class SkTArray {
 public:
     /**
@@ skipping 34 matching lines @@
     /**
      * assign copy of array to this
      */
     SkTArray& operator =(const SkTArray& array) {
         for (int i = 0; i < fCount; ++i) {
             fItemArray[i].~T();
         }
         fCount = 0;
         this->checkRealloc((int)array.count());
         fCount = array.count();
-        SkTArrayExt::copy(this, static_cast<const T*>(array.fMemArray));
+        this->copy(static_cast<const T*>(array.fMemArray));
         return *this;
     }
 
     ~SkTArray() {
         for (int i = 0; i < fCount; ++i) {
             fItemArray[i].~T();
         }
         if (fMemArray != fPreAllocMemArray) {
             sk_free(fMemArray);
         }
@@ skipping 24 matching lines @@
     /**
      * Resets to a copy of a C array.
      */
     void reset(const T* array, int count) {
         for (int i = 0; i < fCount; ++i) {
             fItemArray[i].~T();
         }
         int delta = count - fCount;
         this->checkRealloc(delta);
         fCount = count;
-        SkTArrayExt::copy(this, array);
+        this->copy(array);
     }
 
     void removeShuffle(int n) {
         SkASSERT(n < fCount);
         int newCount = fCount - 1;
         fCount = newCount;
         fItemArray[n].~T();
         if (n != newCount) {
-            SkTArrayExt::copy(this, n, newCount);
-            fItemArray[newCount].~T();
+            this->move(n, newCount);
         }
     }
 
     /**
      * Number of elements in the array.
      */
     int count() const { return fCount; }
 
     /**
      * Is the array empty.
@@ skipping 241 matching lines @@
         fPreAllocMemArray   = preAllocStorage;
         if (fReserveCount >= fCount &&
             preAllocStorage) {
             fAllocCount = fReserveCount;
             fMemArray = preAllocStorage;
         } else {
             fAllocCount = SkMax32(fCount, fReserveCount);
             fMemArray = sk_malloc_throw(fAllocCount * sizeof(T));
         }
 
-        SkTArrayExt::copy(this, array);
+        this->copy(array);
     }
 
 private:
+    /** In the following move and copy methods, 'dst' is assumed to be uninitialized raw storage.
+     *  In the following move methods, 'src' is destroyed leaving behind uninitialized raw storage.
+     */
+    template <bool E = MEM_COPY> SK_WHEN(E, void) copy(const T* src) {
+        sk_careful_memcpy(fMemArray, src, fCount * sizeof(T));
+    }
+    template <bool E = MEM_COPY> SK_WHEN(E, void) move(int dst, int src) {
+        memcpy(&fItemArray[dst], &fItemArray[src], sizeof(T));
+    }
+    template <bool E = MEM_COPY> SK_WHEN(E, void) move(char* dst) {
+        sk_careful_memcpy(dst, fMemArray, fCount * sizeof(T));
+    }
+
+    template <bool E = MEM_COPY> SK_WHEN(!E, void) copy(const T* src) {
+        for (int i = 0; i < fCount; ++i) {
+            new (fItemArray + i) T(src[i]);
+        }
+    }
+    template <bool E = MEM_COPY> SK_WHEN(!E, void) move(int dst, int src) {
+        new (&fItemArray[dst]) T(std::move(fItemArray[src]));
+        fItemArray[src].~T();
+    }
+    template <bool E = MEM_COPY> SK_WHEN(!E, void) move(char* dst) {
+        for (int i = 0; i < fCount; ++i) {
+            new (dst + sizeof(T) * i) T(std::move(fItemArray[i]));
+            fItemArray[i].~T();
+        }
+    }
 
     static const int gMIN_ALLOC_COUNT = 8;
 
     // Helper function that makes space for n objects, adjusts the count, but does not initialize
     // the new objects.
     void* push_back_raw(int n) {
         this->checkRealloc(n);
         void* ptr = fItemArray + fCount;
         fCount += n;
         return ptr;
@@ skipping 17 matching lines @@
 
             fAllocCount = newAllocCount;
             char* newMemArray;
 
             if (fAllocCount == fReserveCount && fPreAllocMemArray) {
                 newMemArray = (char*) fPreAllocMemArray;
             } else {
                 newMemArray = (char*) sk_malloc_throw(fAllocCount*sizeof(T));
             }
 
-            SkTArrayExt::copyAndDelete<T>(this, newMemArray);
+            this->move(newMemArray);
 
             if (fMemArray != fPreAllocMemArray) {
                 sk_free(fMemArray);
             }
             fMemArray = newMemArray;
         }
     }
 
     friend void* operator new<T>(size_t, SkTArray*, int);
 
-    template<typename X> friend void SkTArrayExt::copy(SkTArray<X, true>* that, int dst, int src);
-    template<typename X> friend void SkTArrayExt::copy(SkTArray<X, true>* that, const X*);
-    template<typename X> friend void SkTArrayExt::copyAndDelete(SkTArray<X, true>* that, char*);
-
-    template<typename X> friend void SkTArrayExt::copy(SkTArray<X, false>* that, int dst, int src);
-    template<typename X> friend void SkTArrayExt::copy(SkTArray<X, false>* that, const X*);
-    template<typename X> friend void SkTArrayExt::copyAndDelete(SkTArray<X, false>* that, char*);
-
     int     fReserveCount;
     int     fCount;
     int     fAllocCount;
     void*   fPreAllocMemArray;
     union {
         T*       fItemArray;
         void*    fMemArray;
     };
 };
 
@@ skipping 55 matching lines @@
     SkSTArray& operator= (const INHERITED& array) {
         INHERITED::operator=(array);
         return *this;
     }
 
 private:
     SkAlignedSTStorage<N,T> fStorage;
 };
 
 #endif