mirror of
https://github.com/kidfromjupiter/nearby.git
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124 lines
3.4 KiB
C++
124 lines
3.4 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/test/fake_task_runner.h"
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#include <functional>
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#include <future> // NOLINT
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#include <memory>
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#include <utility>
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#include <vector>
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#include "absl/time/time.h"
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namespace nearby {
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std::atomic_uint FakeTaskRunner::running_thread_count_ = 0;
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bool FakeTaskRunner::PostTask(absl::AnyInvocable<void()> task) {
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if (mode_ == Mode::kNoPending) {
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run(std::move(task));
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return true;
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}
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pending_tasks_.push_back(std::move(task));
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return true;
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}
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bool FakeTaskRunner::PostDelayedTask(absl::Duration delay,
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absl::AnyInvocable<void()> task) {
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std::unique_ptr<Timer> timer = std::make_unique<FakeTimer>(clock_);
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Timer* timer_ptr = timer.get();
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uint32_t id = GenerateId();
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pending_delayed_tasks_.emplace(id, std::move(timer));
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timer_ptr->Start(delay / absl::Milliseconds(1), 0,
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[this, task = std::move(task), id]() mutable {
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PostTask(std::move(task));
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completed_delayed_tasks_.push_back(id);
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});
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return true;
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}
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void FakeTaskRunner::RunNextTask() {
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if (pending_tasks_.empty()) {
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return;
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}
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run(std::move(pending_tasks_.front()));
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pending_tasks_.erase(pending_tasks_.begin());
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}
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void FakeTaskRunner::RunAllPendingTasks() {
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while (!pending_tasks_.empty()) {
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RunNextTask();
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}
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}
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const std::vector<absl::AnyInvocable<void()>>& FakeTaskRunner::GetPendingTasks()
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const {
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return pending_tasks_;
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}
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const absl::flat_hash_map<uint32_t, std::unique_ptr<Timer>>&
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FakeTaskRunner::GetPendingDelayedTask() {
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if (!completed_delayed_tasks_.empty()) {
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for (uint32_t id : completed_delayed_tasks_) {
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pending_delayed_tasks_.erase(id);
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}
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}
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return pending_delayed_tasks_;
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}
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bool FakeTaskRunner::WaitForRunningTasksWithTimeout(absl::Duration timeout) {
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int i = (timeout / absl::Milliseconds(1)) / 50;
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while (running_thread_count_ != 0 && i > 0) {
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absl::SleepFor(absl::Milliseconds(50));
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--i;
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}
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return running_thread_count_ == 0;
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}
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uint32_t FakeTaskRunner::GenerateId() {
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++current_id_;
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return current_id_;
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}
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void FakeTaskRunner::CleanThreads() {
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auto it = threads_.begin();
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while (it != threads_.end()) {
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// Delete the thread if it is ready
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auto status = it->wait_for(std::chrono::seconds(0));
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if (status == std::future_status::ready) {
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it = threads_.erase(it);
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} else {
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++it;
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}
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}
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}
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void FakeTaskRunner::run(absl::AnyInvocable<void()> task) {
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absl::MutexLock lock(&mutex_);
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CleanThreads();
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++running_thread_count_;
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// Run the task in a new thread, to simulate the real environment.
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std::future<void> thread =
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std::async(std::launch::async, [&, task = std::move(task)]() mutable {
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task();
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--running_thread_count_;
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});
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threads_.push_back(std::move(thread));
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}
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} // namespace nearby
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