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// Copyright 2018 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_PROCESS_HEAP_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_PROCESS_HEAP_H_
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/atomics.h"
#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
namespace blink {
class CrossThreadPersistentRegion;
class PLATFORM_EXPORT ProcessHeap {
STATIC_ONLY(ProcessHeap);
public:
static void Init();
static CrossThreadPersistentRegion& GetCrossThreadPersistentRegion();
static CrossThreadPersistentRegion& GetCrossThreadWeakPersistentRegion();
// Access to the CrossThreadPersistentRegion from multiple threads has to be
// prevented as allocation, freeing, and iteration of nodes may otherwise
// cause data races.
//
// Examples include:
// - Iteration of strong cross-thread Persistents.
// - Iteration and processing of weak cross-thread Persistents. The lock
// needs to span both operations as iteration of weak persistents only
// registers memory regions that are then processed afterwards.
static Mutex& CrossThreadPersistentMutex();
static void IncreaseTotalAllocatedObjectSize(size_t delta) {
AtomicAdd(&total_allocated_object_size_, static_cast<long>(delta));
}
static void DecreaseTotalAllocatedObjectSize(size_t delta) {
AtomicSubtract(&total_allocated_object_size_, static_cast<long>(delta));
}
static size_t TotalAllocatedObjectSize() {
return AcquireLoad(&total_allocated_object_size_);
}
static void IncreaseTotalMarkedObjectSize(size_t delta) {
AtomicAdd(&total_marked_object_size_, static_cast<long>(delta));
}
static void DecreaseTotalMarkedObjectSize(size_t delta) {
AtomicSubtract(&total_marked_object_size_, static_cast<long>(delta));
}
static size_t TotalMarkedObjectSize() {
return AcquireLoad(&total_marked_object_size_);
}
static void IncreaseTotalAllocatedSpace(size_t delta) {
AtomicAdd(&total_allocated_space_, static_cast<long>(delta));
}
static void DecreaseTotalAllocatedSpace(size_t delta) {
AtomicSubtract(&total_allocated_space_, static_cast<long>(delta));
}
static size_t TotalAllocatedSpace() {
return AcquireLoad(&total_allocated_space_);
}
static void ResetHeapCounters();
private:
static size_t total_allocated_space_;
static size_t total_allocated_object_size_;
static size_t total_marked_object_size_;
friend class ThreadState;
};
} // namespace blink
#endif
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