1 // Copyright 2021 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "FreeRTOS.h" 17 #include "pw_chrono/system_clock.h" 18 #include "pw_function/function.h" 19 #include "timers.h" 20 21 namespace pw::chrono::backend { 22 23 struct NativeSystemTimer { 24 StaticTimer_t tcb; 25 enum class State { 26 // Timer is not scheduled to execute the user's callback in the future. If 27 // the native callback gets invoked it will do nothing if it in this state. 28 // The native callback will also transition to this state before invoking 29 // the user's callback. 30 kCancelled = 0, 31 32 // Timer is scheduled to execute the user's callback. If the native callback 33 // gets invoked it will invoke the user's callback. 34 kScheduled = 1, 35 }; 36 State state; 37 SystemClock::time_point expiry_deadline; 38 Function<void(SystemClock::time_point expired_deadline)> user_callback; 39 }; 40 using NativeSystemTimerHandle = NativeSystemTimer&; 41 42 } // namespace pw::chrono::backend 43