chromium/third_party/perfetto/src/base/periodic_task.cc

/*
 * Copyright (C) 2021 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "perfetto/ext/base/periodic_task.h"

#include <limits>

#include "perfetto/base/build_config.h"
#include "perfetto/base/logging.h"
#include "perfetto/base/task_runner.h"
#include "perfetto/base/time.h"
#include "perfetto/ext/base/file_utils.h"

#if PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) || \
    (PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) && __ANDROID_API__ >= 19)
#include <sys/timerfd.h>
#endif

namespace perfetto {
namespace base {

namespace {

uint32_t GetNextDelayMs(const TimeMillis& now_ms,
                        const PeriodicTask::Args& args) { … }

ScopedPlatformHandle CreateTimerFd(const PeriodicTask::Args& args) { … }

}  // namespace

PeriodicTask::PeriodicTask(TaskRunner* task_runner)
    : … { … }

PeriodicTask::~PeriodicTask() { … }

void PeriodicTask::Start(Args args) { … }

void PeriodicTask::PostNextTask() { … }

// static
// This function can be called in two ways (both from the TaskRunner):
// 1. When using a timerfd, this task is registered as a FD watch.
// 2. When using PostDelayedTask, this is the task posted on the TaskRunner.
void PeriodicTask::RunTaskAndPostNext(WeakPtr<PeriodicTask> thiz,
                                      uint32_t generation) { … }

void PeriodicTask::Reset() { … }

void PeriodicTask::ResetTimerFd() { … }

}  // namespace base
}  // namespace perfetto