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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <assert.h>
#include "memory/allocator.h"
#include "memory/arena.h"
#include "rocksdb/write_buffer_manager.h"
namespace ROCKSDB_NAMESPACE {
AllocTracker::AllocTracker(WriteBufferManager* write_buffer_manager)
: write_buffer_manager_(write_buffer_manager),
bytes_allocated_(0),
done_allocating_(false),
freed_(false) {}
AllocTracker::~AllocTracker() { FreeMem(); }
void AllocTracker::Allocate(size_t bytes) {
assert(write_buffer_manager_ != nullptr);
if (write_buffer_manager_->enabled() ||
write_buffer_manager_->cost_to_cache()) {
bytes_allocated_.fetch_add(bytes, std::memory_order_relaxed);
write_buffer_manager_->ReserveMem(bytes);
}
}
void AllocTracker::DoneAllocating() {
if (write_buffer_manager_ != nullptr && !done_allocating_) {
if (write_buffer_manager_->enabled() ||
write_buffer_manager_->cost_to_cache()) {
write_buffer_manager_->ScheduleFreeMem(
bytes_allocated_.load(std::memory_order_relaxed));
} else {
assert(bytes_allocated_.load(std::memory_order_relaxed) == 0);
}
done_allocating_ = true;
}
}
void AllocTracker::FreeMem() {
if (!done_allocating_) {
DoneAllocating();
}
if (write_buffer_manager_ != nullptr && !freed_) {
if (write_buffer_manager_->enabled() ||
write_buffer_manager_->cost_to_cache()) {
write_buffer_manager_->FreeMem(
bytes_allocated_.load(std::memory_order_relaxed));
} else {
assert(bytes_allocated_.load(std::memory_order_relaxed) == 0);
}
freed_ = true;
}
}
} // namespace ROCKSDB_NAMESPACE
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