| // Copyright 2023 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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 "pw_async/fake_dispatcher.h" |
| |
| #include "pw_async/task.h" |
| #include "pw_log/log.h" |
| |
| using namespace std::chrono_literals; |
| |
| namespace pw::async::test::backend { |
| |
| NativeFakeDispatcher::NativeFakeDispatcher(Dispatcher& dispatcher) |
| : dispatcher_(dispatcher) {} |
| |
| NativeFakeDispatcher::~NativeFakeDispatcher() { |
| RequestStop(); |
| DrainTaskQueue(); |
| } |
| |
| bool NativeFakeDispatcher::RunUntilIdle() { |
| bool tasks_ran = ExecuteDueTasks(); |
| if (stop_requested_) { |
| tasks_ran |= DrainTaskQueue(); |
| } |
| return tasks_ran; |
| } |
| |
| bool NativeFakeDispatcher::RunUntil(chrono::SystemClock::time_point end_time) { |
| bool tasks_ran = false; |
| while (!task_queue_.empty() && task_queue_.front().due_time() <= end_time && |
| !stop_requested_) { |
| now_ = task_queue_.front().due_time(); |
| tasks_ran |= ExecuteDueTasks(); |
| } |
| |
| if (stop_requested_) { |
| tasks_ran |= DrainTaskQueue(); |
| return tasks_ran; |
| } |
| |
| if (now_ < end_time) { |
| now_ = end_time; |
| } |
| return tasks_ran; |
| } |
| |
| bool NativeFakeDispatcher::RunFor(chrono::SystemClock::duration duration) { |
| return RunUntil(now() + duration); |
| } |
| |
| bool NativeFakeDispatcher::ExecuteDueTasks() { |
| bool task_ran = false; |
| while (!task_queue_.empty() && task_queue_.front().due_time() <= now() && |
| !stop_requested_) { |
| ::pw::async::backend::NativeTask& task = task_queue_.front(); |
| task_queue_.pop_front(); |
| |
| Context ctx{&dispatcher_, &task.task_}; |
| task(ctx, OkStatus()); |
| |
| task_ran = true; |
| } |
| return task_ran; |
| } |
| |
| void NativeFakeDispatcher::RequestStop() { |
| PW_LOG_DEBUG("stop requested"); |
| stop_requested_ = true; |
| } |
| |
| bool NativeFakeDispatcher::DrainTaskQueue() { |
| bool task_ran = false; |
| while (!task_queue_.empty()) { |
| ::pw::async::backend::NativeTask& task = task_queue_.front(); |
| task_queue_.pop_front(); |
| |
| PW_LOG_DEBUG("running cancelled task"); |
| Context ctx{&dispatcher_, &task.task_}; |
| task(ctx, Status::Cancelled()); |
| |
| task_ran = true; |
| } |
| return task_ran; |
| } |
| |
| void NativeFakeDispatcher::Post(Task& task) { PostAt(task, now()); } |
| |
| void NativeFakeDispatcher::PostAfter(Task& task, |
| chrono::SystemClock::duration delay) { |
| PostAt(task, now() + delay); |
| } |
| |
| void NativeFakeDispatcher::PostAt(Task& task, |
| chrono::SystemClock::time_point time) { |
| PW_LOG_DEBUG("posting task"); |
| PostTaskInternal(task.native_type(), time); |
| } |
| |
| bool NativeFakeDispatcher::Cancel(Task& task) { |
| return task_queue_.remove(task.native_type()); |
| } |
| |
| void NativeFakeDispatcher::PostTaskInternal( |
| ::pw::async::backend::NativeTask& task, |
| chrono::SystemClock::time_point time_due) { |
| if (!task.unlisted()) { |
| if (task.due_time() <= time_due) { |
| // No need to repost a task that was already queued to run. |
| return; |
| } |
| // The task needs its time updated, so we have to move it to |
| // a different part of the list. |
| task.unlist(); |
| } |
| task.set_due_time(time_due); |
| auto it_front = task_queue_.begin(); |
| auto it_behind = task_queue_.before_begin(); |
| while (it_front != task_queue_.end() && time_due >= it_front->due_time()) { |
| ++it_front; |
| ++it_behind; |
| } |
| task_queue_.insert_after(it_behind, task); |
| } |
| |
| } // namespace pw::async::test::backend |