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// Copyright 2020 the V8 project 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 V8_HEAP_CPPGC_PROCESS_HEAP_STATISTICS_H_
#define V8_HEAP_CPPGC_PROCESS_HEAP_STATISTICS_H_
#include "include/cppgc/process-heap-statistics.h"
#include "src/heap/cppgc/stats-collector.h"
namespace cppgc {
namespace internal {
class ProcessHeapStatisticsUpdater {
public:
// Allocation observer implementation for heaps should register to contribute
// to ProcessHeapStatistics. The heap is responsible for allocating and
// registering the observer impl with its stats collector.
class AllocationObserverImpl final
: public StatsCollector::AllocationObserver {
public:
void AllocatedObjectSizeIncreased(size_t bytes) final {
ProcessHeapStatisticsUpdater::IncreaseTotalAllocatedObjectSize(bytes);
object_size_changes_since_last_reset_ += bytes;
}
void AllocatedObjectSizeDecreased(size_t bytes) final {
ProcessHeapStatisticsUpdater::DecreaseTotalAllocatedObjectSize(bytes);
object_size_changes_since_last_reset_ -= bytes;
}
void ResetAllocatedObjectSize(size_t bytes) final {
ProcessHeapStatisticsUpdater::DecreaseTotalAllocatedObjectSize(
object_size_changes_since_last_reset_);
ProcessHeapStatisticsUpdater::IncreaseTotalAllocatedObjectSize(bytes);
object_size_changes_since_last_reset_ = bytes;
}
void AllocatedSizeIncreased(size_t bytes) final {
ProcessHeapStatisticsUpdater::IncreaseTotalAllocatedSpace(bytes);
}
void AllocatedSizeDecreased(size_t bytes) final {
ProcessHeapStatisticsUpdater::DecreaseTotalAllocatedSpace(bytes);
}
private:
size_t object_size_changes_since_last_reset_ = 0;
};
// For cppgc::ProcessHeapStatistics
static void IncreaseTotalAllocatedObjectSize(size_t delta) {
::cppgc::ProcessHeapStatistics::total_allocated_object_size_.fetch_add(
delta, std::memory_order_relaxed);
}
static void DecreaseTotalAllocatedObjectSize(size_t delta) {
::cppgc::ProcessHeapStatistics::total_allocated_object_size_.fetch_sub(
delta, std::memory_order_relaxed);
}
static void IncreaseTotalAllocatedSpace(size_t delta) {
::cppgc::ProcessHeapStatistics::total_allocated_space_.fetch_add(
delta, std::memory_order_relaxed);
}
static void DecreaseTotalAllocatedSpace(size_t delta) {
::cppgc::ProcessHeapStatistics::total_allocated_space_.fetch_sub(
delta, std::memory_order_relaxed);
}
};
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_PROCESS_HEAP_STATISTICS_H_
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