Server : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.20 System : Linux st2.domain.com 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 User : apache ( 48) PHP Version : 7.4.20 Disable Function : NONE Directory : /home/real/node-v13.0.1/deps/v8/src/zone/ |
// Copyright 2016 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.
#include "src/zone/accounting-allocator.h"
#include "src/base/logging.h"
#include "src/utils/allocation.h"
#include "src/zone/zone-segment.h"
namespace v8 {
namespace internal {
AccountingAllocator::~AccountingAllocator() = default;
Segment* AccountingAllocator::AllocateSegment(size_t bytes) {
void* memory = AllocWithRetry(bytes);
if (memory == nullptr) return nullptr;
size_t current =
current_memory_usage_.fetch_add(bytes, std::memory_order_relaxed) + bytes;
size_t max = max_memory_usage_.load(std::memory_order_relaxed);
while (current > max && !max_memory_usage_.compare_exchange_weak(
max, current, std::memory_order_relaxed)) {
// {max} was updated by {compare_exchange_weak}; retry.
}
DCHECK_LE(sizeof(Segment), bytes);
return new (memory) Segment(bytes);
}
void AccountingAllocator::ReturnSegment(Segment* segment) {
segment->ZapContents();
current_memory_usage_.fetch_sub(segment->total_size(),
std::memory_order_relaxed);
segment->ZapHeader();
free(segment);
}
} // namespace internal
} // namespace v8