| // Copyright 2020 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. |
| #pragma once |
| |
| #include <thread> |
| |
| #include "pw_chrono/system_clock.h" |
| #include "pw_thread/sleep.h" |
| |
| namespace pw::this_thread { |
| |
| inline void sleep_for(chrono::SystemClock::duration for_at_least) { |
| for_at_least = std::max(for_at_least, chrono::SystemClock::duration::zero()); |
| // Although many implementations do yield with sleep_for(0), it is not |
| // required, ergo we explicitly add handling. |
| if (for_at_least == chrono::SystemClock::duration::zero()) { |
| return std::this_thread::yield(); |
| } |
| return std::this_thread::sleep_for(for_at_least); |
| } |
| |
| inline void sleep_until(chrono::SystemClock::time_point until_at_least) { |
| // Although many implementations do yield with deadlines in the past until |
| // the current time, it is not required, ergo we explicitly add handling. |
| if (chrono::SystemClock::now() >= until_at_least) { |
| return std::this_thread::yield(); |
| } |
| return std::this_thread::sleep_until(until_at_least); |
| } |
| |
| } // namespace pw::this_thread |
