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

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

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
+// 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 Partitions_h
-#define Partitions_h
+#include "platform/wtf/allocator/Partitions.h"
 
-#include <string.h>
-#include "base/allocator/partition_allocator/partition_alloc.h"
-#include "base/allocator/partition_allocator/spin_lock.h"
-#include "wtf/Assertions.h"
-#include "wtf/WTF.h"
-#include "wtf/WTFExport.h"
-
-namespace WTF {
-
-class WTF_EXPORT Partitions {
- public:
-  typedef void (*ReportPartitionAllocSizeFunction)(size_t);
-
-  // Name of allocator used by tracing for marking sub-allocations while take
-  // memory snapshots.
-  static const char* const kAllocatedObjectPoolName;
-
-  static void initialize(ReportPartitionAllocSizeFunction);
-  ALWAYS_INLINE static base::PartitionRootGeneric* arrayBufferPartition() {
-    DCHECK(s_initialized);
-    return m_arrayBufferAllocator.root();
-  }
-
-  ALWAYS_INLINE static base::PartitionRootGeneric* bufferPartition() {
-    DCHECK(s_initialized);
-    return m_bufferAllocator.root();
-  }
-
-  ALWAYS_INLINE static base::PartitionRootGeneric* fastMallocPartition() {
-    DCHECK(s_initialized);
-    return m_fastMallocAllocator.root();
-  }
-
-  ALWAYS_INLINE static base::PartitionRoot* nodePartition() {
-    NOTREACHED();
-    return nullptr;
-  }
-  ALWAYS_INLINE static base::PartitionRoot* layoutPartition() {
-    DCHECK(s_initialized);
-    return m_layoutAllocator.root();
-  }
-
-  static size_t currentDOMMemoryUsage() {
-    NOTREACHED();
-    return 0;
-  }
-
-  static size_t totalSizeOfCommittedPages() {
-    size_t totalSize = 0;
-    totalSize += m_fastMallocAllocator.root()->total_size_of_committed_pages;
-    totalSize += m_arrayBufferAllocator.root()->total_size_of_committed_pages;
-    totalSize += m_bufferAllocator.root()->total_size_of_committed_pages;
-    totalSize += m_layoutAllocator.root()->total_size_of_committed_pages;
-    return totalSize;
-  }
-
-  static void decommitFreeableMemory();
-
-  static void reportMemoryUsageHistogram();
-
-  static void dumpMemoryStats(bool isLightDump, base::PartitionStatsDumper*);
-
-  ALWAYS_INLINE static void* bufferMalloc(size_t n, const char* typeName) {
-    return PartitionAllocGeneric(bufferPartition(), n, typeName);
-  }
-  ALWAYS_INLINE static void* bufferRealloc(void* p,
-                                           size_t n,
-                                           const char* typeName) {
-    return PartitionReallocGeneric(bufferPartition(), p, n, typeName);
-  }
-  ALWAYS_INLINE static void bufferFree(void* p) {
-    PartitionFreeGeneric(bufferPartition(), p);
-  }
-  ALWAYS_INLINE static size_t bufferActualSize(size_t n) {
-    return PartitionAllocActualSize(bufferPartition(), n);
-  }
-  static void* fastMalloc(size_t n, const char* typeName) {
-    return PartitionAllocGeneric(Partitions::fastMallocPartition(), n,
-                                 typeName);
-  }
-  static void* fastZeroedMalloc(size_t n, const char* typeName) {
-    void* result = fastMalloc(n, typeName);
-    memset(result, 0, n);
-    return result;
-  }
-  static void* fastRealloc(void* p, size_t n, const char* typeName) {
-    return PartitionReallocGeneric(Partitions::fastMallocPartition(), p, n,
-                                   typeName);
-  }
-  static void fastFree(void* p) {
-    PartitionFreeGeneric(Partitions::fastMallocPartition(), p);
-  }
-
-  static void handleOutOfMemory();
-
- private:
-  static base::subtle::SpinLock s_initializationLock;
-  static bool s_initialized;
-
-  // We have the following four partitions.
-  //   - LayoutObject partition: A partition to allocate LayoutObjects.
-  //     We prepare a dedicated partition for LayoutObjects because they
-  //     are likely to be a source of use-after-frees. Another reason
-  //     is for performance: As LayoutObjects are guaranteed to only be used
-  //     by the main thread, we can bypass acquiring a lock. Also we can
-  //     improve memory locality by putting LayoutObjects together.
-  //   - ArrayBuffer partition: A partition to allocate array buffers.
-  //   - Buffer partition: A partition to allocate other buffers that have
-  //     a strong risk where the length and/or the contents are exploited from
-  //     user scripts. Vectors, HashTables and Strings are allocated in the
-  //      buffer partition.
-  //   - Fast malloc partition: A partition to allocate all other objects.
-  static base::PartitionAllocatorGeneric m_fastMallocAllocator;
-  static base::PartitionAllocatorGeneric m_arrayBufferAllocator;
-  static base::PartitionAllocatorGeneric m_bufferAllocator;
-  static base::SizeSpecificPartitionAllocator<1024> m_layoutAllocator;
-  static ReportPartitionAllocSizeFunction m_reportSizeFunction;
-};
-
-using base::kGenericMaxDirectMapped;
-using base::kPageAllocationGranularity;
-using base::kPageAllocationGranularityBaseMask;
-using base::kPageAllocationGranularityOffsetMask;
-using base::kSystemPageSize;
-
-using base::AllocPages;
-using base::DecommitSystemPages;
-using base::DiscardSystemPages;
-using base::PartitionFree;
-using base::FreePages;
-using base::GetAllocPageErrorCode;
-using base::RecommitSystemPages;
-using base::RoundDownToSystemPage;
-using base::RoundUpToSystemPage;
-using base::SetSystemPagesAccessible;
-using base::SetSystemPagesInaccessible;
-
-using base::PageAccessible;
-using base::PageInaccessible;
-using base::PartitionStatsDumper;
-using base::PartitionMemoryStats;
-using base::PartitionBucketMemoryStats;
-using base::PartitionAllocHooks;
-
-}  // namespace WTF
-
-#endif  // Partitions_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