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// Copyright 2015 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.
#include "content/browser/cache_storage/cache_storage_scheduler.h"
#include <string>
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "content/browser/cache_storage/cache_storage_histogram_macros.h"
#include "content/browser/cache_storage/cache_storage_operation.h"
namespace content {
CacheStorageScheduler::CacheStorageScheduler(
CacheStorageSchedulerClient client_type)
: client_type_(client_type), weak_ptr_factory_(this) {}
CacheStorageScheduler::~CacheStorageScheduler() {}
void CacheStorageScheduler::ScheduleOperation(base::OnceClosure closure) {
CACHE_STORAGE_SCHEDULER_UMA(COUNTS_10000, "QueueLength", client_type_,
pending_operations_.size());
pending_operations_.push_back(std::make_unique<CacheStorageOperation>(
std::move(closure), client_type_, base::ThreadTaskRunnerHandle::Get()));
RunOperationIfIdle();
}
void CacheStorageScheduler::CompleteOperationAndRunNext() {
DCHECK(running_operation_);
running_operation_.reset();
RunOperationIfIdle();
}
bool CacheStorageScheduler::ScheduledOperations() const {
return running_operation_ || !pending_operations_.empty();
}
void CacheStorageScheduler::RunOperationIfIdle() {
if (!running_operation_ && !pending_operations_.empty()) {
// TODO(jkarlin): Run multiple operations in parallel where allowed.
running_operation_ = std::move(pending_operations_.front());
pending_operations_.pop_front();
CACHE_STORAGE_SCHEDULER_UMA(
TIMES, "QueueDuration", client_type_,
base::TimeTicks::Now() - running_operation_->creation_ticks());
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&CacheStorageOperation::Run,
running_operation_->AsWeakPtr()));
}
}
} // namespace content
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