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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/reporting/util/wrapped_rate_limiter.h"
#include "base/memory/ptr_util.h"
#include "base/memory/weak_ptr.h"
#include "base/metrics/histogram_functions.h"
#include "base/sequence_checker.h"
#include "base/task/bind_post_task.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/threading/sequence_bound.h"
#include "components/reporting/util/rate_limiter_interface.h"
namespace reporting {
// static
WrappedRateLimiter::SmartPtr WrappedRateLimiter::Create(
std::unique_ptr<RateLimiterInterface> rate_limiter) {
auto sequenced_task_runner = base::ThreadPool::CreateSequencedTaskRunner(
{base::TaskPriority::BEST_EFFORT});
return SmartPtr(
new WrappedRateLimiter(sequenced_task_runner, std::move(rate_limiter)),
base::OnTaskRunnerDeleter(sequenced_task_runner));
}
WrappedRateLimiter::~WrappedRateLimiter() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
// static
bool WrappedRateLimiter::Acquire(base::WeakPtr<WrappedRateLimiter> self,
size_t event_size) {
if (!self) {
base::UmaHistogramBoolean(kRateLimitedEventsUma, false);
return false;
}
DCHECK_CALLED_ON_VALID_SEQUENCE(self->sequence_checker_);
if (!self->rate_limiter_->Acquire(event_size)) {
base::UmaHistogramBoolean(kRateLimitedEventsUma, false);
return false;
}
base::UmaHistogramBoolean(kRateLimitedEventsUma, true);
return true;
}
// static
void WrappedRateLimiter::AsyncAcquire(base::WeakPtr<WrappedRateLimiter> self,
size_t event_size,
base::OnceCallback<void(bool)> cb) {
base::BindOnce(&WrappedRateLimiter::Acquire, self)
.Then(std::move(cb))
.Run(event_size);
}
WrappedRateLimiter::AsyncAcquireCb WrappedRateLimiter::async_acquire_cb()
const {
return async_acquire_cb_;
}
WrappedRateLimiter::WrappedRateLimiter(
scoped_refptr<base::SequencedTaskRunner> sequenced_task_runner,
std::unique_ptr<RateLimiterInterface> rate_limiter)
: sequenced_task_runner_(sequenced_task_runner),
rate_limiter_(std::move(rate_limiter)) {
DETACH_FROM_SEQUENCE(sequence_checker_);
async_acquire_cb_ =
base::BindPostTask(sequenced_task_runner_,
base::BindRepeating(&WrappedRateLimiter::AsyncAcquire,
weak_ptr_factory_.GetWeakPtr()));
}
} // namespace reporting
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