chromium/content/browser/background_sync/background_sync_scheduler.cc

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/background_sync/background_sync_scheduler.h"

#include <algorithm>

#include "base/memory/scoped_refptr.h"
#include "build/build_config.h"
#include "content/browser/browser_context_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/background_sync_controller.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"

namespace content {

DelayedProcessingInfoMap;

// static
BackgroundSyncScheduler* BackgroundSyncScheduler::GetFor(
    BrowserContext* browser_context) { … }

BackgroundSyncScheduler::BackgroundSyncScheduler() = default;

BackgroundSyncScheduler::~BackgroundSyncScheduler() { … }

void BackgroundSyncScheduler::ScheduleDelayedProcessing(
    StoragePartitionImpl* storage_partition,
    blink::mojom::BackgroundSyncType sync_type,
    base::TimeDelta delay,
    base::OnceClosure delayed_task) { … }

void BackgroundSyncScheduler::CancelDelayedProcessing(
    StoragePartitionImpl* storage_partition,
    blink::mojom::BackgroundSyncType sync_type) { … }

DelayedProcessingInfoMap& BackgroundSyncScheduler::GetDelayedProcessingInfoMap(
    blink::mojom::BackgroundSyncType sync_type) { … }

void BackgroundSyncScheduler::RunDelayedTaskAndPruneInfoMap(
    blink::mojom::BackgroundSyncType sync_type,
    StoragePartitionImpl* storage_partition,
    base::OnceClosure delayed_task) { … }

#if BUILDFLAG(IS_ANDROID)
void BackgroundSyncScheduler::ScheduleOrCancelBrowserWakeupForSyncType(
    blink::mojom::BackgroundSyncType sync_type,
    StoragePartitionImpl* storage_partition) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  auto* browser_context = storage_partition->browser_context();
  DCHECK(browser_context);
  auto* controller = browser_context->GetBackgroundSyncController();
  DCHECK(controller);

  auto& delayed_processing_info = GetDelayedProcessingInfoMap(sync_type);

  // If no more scheduled tasks remain, cancel browser wakeup.
  // Canceling when there's no task scheduled is a no-op.
  if (delayed_processing_info.empty()) {
    scheduled_wakeup_time_[sync_type] = base::TimeTicks::Max();
    controller->CancelBrowserWakeup(sync_type);
    return;
  }

  // Schedule browser wakeup with the smallest delay required.
  auto& min_info = *std::min_element(
      delayed_processing_info.begin(), delayed_processing_info.end(),
      [](auto& lhs, auto& rhs) {
        return (lhs.second->desired_run_time() - base::TimeTicks::Now()) <
               (rhs.second->desired_run_time() - base::TimeTicks::Now());
      });

  base::TimeTicks next_time = min_info.second->desired_run_time();
  if (next_time >= scheduled_wakeup_time_[sync_type]) {
    // There's an earlier wakeup time scheduled, no need to inform the
    // scheduler.
    return;
  }

  scheduled_wakeup_time_[sync_type] = next_time;
  controller->ScheduleBrowserWakeUpWithDelay(
      sync_type, min_info.second->desired_run_time() - base::TimeTicks::Now());
}
#endif

}  // namespace content