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/*
* 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_ALLOCATOR_PARTITIONS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_ALLOCATOR_PARTITIONS_H_
#include "base/check.h"
#include "base/memory/scoped_refptr.h"
#include "base/numerics/checked_math.h"
#include "partition_alloc/partition_alloc_forward.h"
#include "third_party/blink/renderer/platform/wtf/wtf_export.h"
namespace base {
class SequencedTaskRunner;
}
namespace WTF {
class WTF_EXPORT Partitions {
public:
// Name of allocator used by tracing for marking sub-allocations while take
// memory snapshots.
static const char* const kAllocatedObjectPoolName;
// Should be called on the thread which is or will become the main one.
static void Initialize();
static void InitializeArrayBufferPartition();
static void StartMemoryReclaimer(
scoped_refptr<base::SequencedTaskRunner> task_runner);
// The ArrayBufferPartition is initialized separately from the other
// partitions and so may not always be available. This function can be used to
// determine whether the partition has been initialized.
ALWAYS_INLINE static bool ArrayBufferPartitionInitialized() {
return array_buffer_root_ != nullptr;
}
ALWAYS_INLINE static partition_alloc::PartitionRoot* ArrayBufferPartition() {
DCHECK(initialized_);
DCHECK(ArrayBufferPartitionInitialized());
return array_buffer_root_;
}
ALWAYS_INLINE static partition_alloc::PartitionRoot* BufferPartition() {
DCHECK(initialized_);
return buffer_root_;
}
ALWAYS_INLINE static size_t ComputeAllocationSize(size_t count, size_t size) {
base::CheckedNumeric<size_t> total = count;
total *= size;
return total.ValueOrDie();
}
static size_t TotalSizeOfCommittedPages();
static size_t TotalActiveBytes();
static void DumpMemoryStats(bool is_light_dump,
partition_alloc::PartitionStatsDumper*);
static void* PA_MALLOC_FN BufferMalloc(size_t n, const char* type_name);
static void* BufferTryRealloc(void* p, size_t n, const char* type_name);
static void BufferFree(void* p);
static size_t BufferPotentialCapacity(size_t n);
static void* PA_MALLOC_FN FastMalloc(size_t n, const char* type_name);
static void* PA_MALLOC_FN FastZeroedMalloc(size_t n, const char* type_name);
static void FastFree(void* p);
static void HandleOutOfMemory(size_t size);
// Adjusts the size of the partitions based on process state.
static void AdjustPartitionsForForeground();
static void AdjustPartitionsForBackground();
private:
ALWAYS_INLINE static partition_alloc::PartitionRoot* FastMallocPartition() {
DCHECK(initialized_);
return fast_malloc_root_;
}
static bool InitializeOnce();
static bool initialized_;
// See Allocator.md for a description of these partitions.
static partition_alloc::PartitionRoot* fast_malloc_root_;
static partition_alloc::PartitionRoot* array_buffer_root_;
static partition_alloc::PartitionRoot* buffer_root_;
};
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_ALLOCATOR_PARTITIONS_H_
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