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// Copyright 2021 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_spin_delay/delay.h"
#include <chrono>
#include <cstddef>
#include <cstdint>
namespace {
std::chrono::system_clock::time_point kProgramStart =
std::chrono::system_clock::now();
}
namespace pw::spin_delay {
void WaitMillis(size_t delay_ms) {
std::chrono::system_clock::time_point start =
std::chrono::system_clock::now();
std::chrono::system_clock::time_point now;
size_t difference;
do {
now = std::chrono::system_clock::now();
difference =
std::chrono::duration_cast<std::chrono::milliseconds>(now - start)
.count();
} while (difference < delay_ms);
}
uint32_t Millis() {
std::chrono::system_clock::time_point now;
uint32_t difference;
now = std::chrono::system_clock::now();
difference =
std::chrono::duration_cast<std::chrono::milliseconds>(now - kProgramStart)
.count();
return difference;
}
uint64_t Micros() {
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
return std::chrono::duration_cast<std::chrono::microseconds>(now -
kProgramStart)
.count();
}
} // namespace pw::spin_delay