mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 16:26:10 +03:00
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
|
// Copyright 2016 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 "base/task_scheduler/task_scheduler.h"
|
||
|
|
|
||
|
|
#include <algorithm>
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
#include "base/memory/ptr_util.h"
|
||
|
|
#include "base/sys_info.h"
|
||
|
|
#include "base/task_scheduler/scheduler_worker_pool_params.h"
|
||
|
|
#include "base/task_scheduler/task_scheduler_impl.h"
|
||
|
|
#include "base/threading/platform_thread.h"
|
||
|
|
#include "base/time/time.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
// |g_task_scheduler| is intentionally leaked on shutdown.
|
||
|
|
TaskScheduler* g_task_scheduler = nullptr;
|
||
|
|
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
TaskScheduler::InitParams::InitParams(
|
||
|
|
const SchedulerWorkerPoolParams& background_worker_pool_params_in,
|
||
|
|
const SchedulerWorkerPoolParams& background_blocking_worker_pool_params_in,
|
||
|
|
const SchedulerWorkerPoolParams& foreground_worker_pool_params_in,
|
||
|
|
const SchedulerWorkerPoolParams& foreground_blocking_worker_pool_params_in,
|
||
|
|
SharedWorkerPoolEnvironment shared_worker_pool_environment_in)
|
||
|
|
: background_worker_pool_params(background_worker_pool_params_in),
|
||
|
|
background_blocking_worker_pool_params(
|
||
|
|
background_blocking_worker_pool_params_in),
|
||
|
|
foreground_worker_pool_params(foreground_worker_pool_params_in),
|
||
|
|
foreground_blocking_worker_pool_params(
|
||
|
|
foreground_blocking_worker_pool_params_in),
|
||
|
|
shared_worker_pool_environment(shared_worker_pool_environment_in) {}
|
||
|
|
|
||
|
|
TaskScheduler::InitParams::~InitParams() = default;
|
||
|
|
|
||
|
|
#if !defined(OS_NACL)
|
||
|
|
// static
|
||
|
|
void TaskScheduler::CreateAndStartWithDefaultParams(StringPiece name) {
|
||
|
|
Create(name);
|
||
|
|
GetInstance()->StartWithDefaultParams();
|
||
|
|
}
|
||
|
|
|
||
|
|
void TaskScheduler::StartWithDefaultParams() {
|
||
|
|
// Values were chosen so that:
|
||
|
|
// * There are few background threads.
|
||
|
|
// * Background threads never outnumber foreground threads.
|
||
|
|
// * The system is utilized maximally by foreground threads.
|
||
|
|
const int num_cores = SysInfo::NumberOfProcessors();
|
||
|
|
constexpr int kBackgroundMaxThreads = 1;
|
||
|
|
constexpr int kBackgroundBlockingMaxThreads = 2;
|
||
|
|
const int kForegroundMaxThreads = std::max(1, num_cores);
|
||
|
|
const int kForegroundBlockingMaxThreads = std::max(2, num_cores);
|
||
|
|
|
||
|
|
constexpr TimeDelta kSuggestedReclaimTime = TimeDelta::FromSeconds(30);
|
||
|
|
|
||
|
|
Start({{kBackgroundMaxThreads, kSuggestedReclaimTime},
|
||
|
|
{kBackgroundBlockingMaxThreads, kSuggestedReclaimTime},
|
||
|
|
{kForegroundMaxThreads, kSuggestedReclaimTime},
|
||
|
|
{kForegroundBlockingMaxThreads, kSuggestedReclaimTime}});
|
||
|
|
}
|
||
|
|
#endif // !defined(OS_NACL)
|
||
|
|
|
||
|
|
void TaskScheduler::Create(StringPiece name) {
|
||
|
|
SetInstance(std::make_unique<internal::TaskSchedulerImpl>(name));
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) {
|
||
|
|
delete g_task_scheduler;
|
||
|
|
g_task_scheduler = task_scheduler.release();
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
TaskScheduler* TaskScheduler::GetInstance() {
|
||
|
|
return g_task_scheduler;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base
|