Move files in wtf/ to platform/wtf/ (Part 6).

third_party/WebKit/Source/wtf/allocator/PartitionAllocator.h

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WTF_PartitionAllocator_h
-#define WTF_PartitionAllocator_h
+#include "platform/wtf/allocator/PartitionAllocator.h"
 
-// This is the allocator that is used for allocations that are not on the
-// traced, garbage collected heap. It uses FastMalloc for collections,
-// but uses the partition allocator for the backing store of the collections.
-
-#include "base/allocator/partition_allocator/partition_alloc.h"
-#include "third_party/WebKit/Source/wtf/Allocator.h"
-#include "wtf/Assertions.h"
-#include "wtf/TypeTraits.h"
-#include "wtf/WTFExport.h"
-#include <string.h>
-
-namespace WTF {
-
-class PartitionAllocatorDummyVisitor {
-  DISALLOW_NEW();
-};
-
-class WTF_EXPORT PartitionAllocator {
- public:
-  typedef PartitionAllocatorDummyVisitor Visitor;
-  static const bool isGarbageCollected = false;
-
-  template<typename T>
-  static size_t maxElementCountInBackingStore() {
-    return base::kGenericMaxDirectMapped / sizeof(T);
-  }
-
-  template <typename T>
-  static size_t quantizedSize(size_t count) {
-    CHECK_LE(count, maxElementCountInBackingStore<T>());
-    return PartitionAllocActualSize(WTF::Partitions::bufferPartition(),
-                                    count * sizeof(T));
-  }
-  template <typename T>
-  static T* allocateVectorBacking(size_t size) {
-    return reinterpret_cast<T*>(
-        allocateBacking(size, WTF_HEAP_PROFILER_TYPE_NAME(T)));
-  }
-  template <typename T>
-  static T* allocateExpandedVectorBacking(size_t size) {
-    return reinterpret_cast<T*>(
-        allocateBacking(size, WTF_HEAP_PROFILER_TYPE_NAME(T)));
-  }
-  static void freeVectorBacking(void* address);
-  static inline bool expandVectorBacking(void*, size_t) { return false; }
-  static inline bool shrinkVectorBacking(void* address,
-                                         size_t quantizedCurrentSize,
-                                         size_t quantizedShrunkSize) {
-    // Optimization: if we're downsizing inside the same allocator bucket,
-    // we can skip reallocation.
-    return quantizedCurrentSize == quantizedShrunkSize;
-  }
-  template <typename T>
-  static T* allocateInlineVectorBacking(size_t size) {
-    return allocateVectorBacking<T>(size);
-  }
-  static inline void freeInlineVectorBacking(void* address) {
-    freeVectorBacking(address);
-  }
-  static inline bool expandInlineVectorBacking(void*, size_t) { return false; }
-  static inline bool shrinkInlineVectorBacking(void* address,
-                                               size_t quantizedCurrentSize,
-                                               size_t quantizedShrunkSize) {
-    return shrinkVectorBacking(address, quantizedCurrentSize,
-                               quantizedShrunkSize);
-  }
-
-  template <typename T, typename HashTable>
-  static T* allocateHashTableBacking(size_t size) {
-    return reinterpret_cast<T*>(
-        allocateBacking(size, WTF_HEAP_PROFILER_TYPE_NAME(T)));
-  }
-  template <typename T, typename HashTable>
-  static T* allocateZeroedHashTableBacking(size_t size) {
-    void* result = allocateBacking(size, WTF_HEAP_PROFILER_TYPE_NAME(T));
-    memset(result, 0, size);
-    return reinterpret_cast<T*>(result);
-  }
-  static void freeHashTableBacking(void* address);
-
-  template <typename Return, typename Metadata>
-  static Return malloc(size_t size, const char* typeName) {
-    return reinterpret_cast<Return>(
-        WTF::Partitions::fastMalloc(size, typeName));
-  }
-
-  static inline bool expandHashTableBacking(void*, size_t) { return false; }
-  static void free(void* address) { WTF::Partitions::fastFree(address); }
-  template <typename T>
-  static void* newArray(size_t bytes) {
-    return malloc<void*, void>(bytes, WTF_HEAP_PROFILER_TYPE_NAME(T));
-  }
-  static void deleteArray(void* ptr) {
-    free(ptr);  // Not the system free, the one from this class.
-  }
-
-  static bool isAllocationAllowed() { return true; }
-
-  static void enterGCForbiddenScope() {}
-  static void leaveGCForbiddenScope() {}
-
- private:
-  static void* allocateBacking(size_t, const char* typeName);
-};
-
-// Specializations for heap profiling, so type profiling of |char| is possible
-// even in official builds (because |char| makes up a large portion of the
-// heap.)
-template <>
-WTF_EXPORT char* PartitionAllocator::allocateVectorBacking<char>(size_t);
-template <>
-WTF_EXPORT char* PartitionAllocator::allocateExpandedVectorBacking<char>(
-    size_t);
-
-}  // namespace WTF
-
-#define USE_ALLOCATOR(ClassName, Allocator)                       \
- public:                                                          \
-  void* operator new(size_t size) {                               \
-    return Allocator::template malloc<void*, ClassName>(          \
-        size, WTF_HEAP_PROFILER_TYPE_NAME(ClassName));            \
-  }                                                               \
-  void operator delete(void* p) { Allocator::free(p); }           \
-  void* operator new[](size_t size) {                             \
-    return Allocator::template newArray<ClassName>(size);         \
-  }                                                               \
-  void operator delete[](void* p) { Allocator::deleteArray(p); }  \
-  void* operator new(size_t, NotNullTag, void* location) {        \
-    DCHECK(location);                                             \
-    return location;                                              \
-  }                                                               \
-  void* operator new(size_t, void* location) { return location; } \
-                                                                  \
- private:                                                         \
-  typedef int __thisIsHereToForceASemicolonAfterThisMacro
-
-#endif  // WTF_PartitionAllocator_h
+// The contents of this header was moved to platform/wtf as part of
+// WTF migration project. See the following post for details:
+// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ