HfTime.h

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#pragma once
 
#include <cstdint>
 
#include "McuSelect.h"
 
#if defined(HF_TARGET_MCU_ESP32)   || defined(HF_TARGET_MCU_ESP32S2) || \
    defined(HF_TARGET_MCU_ESP32S3) || defined(HF_TARGET_MCU_ESP32C3) || \
    defined(HF_TARGET_MCU_ESP32C2) || defined(HF_TARGET_MCU_ESP32C6) || \
    defined(HF_TARGET_MCU_ESP32H2)
#  include "EspTime.h"
   namespace hf_time { using ::hf_time::esp32::MonotonicUs;
                       using ::hf_time::esp32::InitMonotonic; }
 
#elif defined(HF_TARGET_MCU_STM32F4) || defined(HF_TARGET_MCU_STM32H7)
#  include "Stm32Time.h"
   namespace hf_time { using ::hf_time::stm32::MonotonicUs;
                       using ::hf_time::stm32::InitMonotonic; }
 
#elif defined(HF_TARGET_MCU_RP2040)
#  include "Rp2040Time.h"
   namespace hf_time { using ::hf_time::rp2040::MonotonicUs;
                       using ::hf_time::rp2040::InitMonotonic; }
 
#elif defined(HF_TARGET_MCU_NONE)
   // Software-only / unit-test build: monotonic clock is a stub. Tests
   // that need a controllable clock should inject their own.
   namespace hf_time {
       inline std::uint64_t MonotonicUs() noexcept { return 0; }
       inline void          InitMonotonic() noexcept {}
   }
 
#else
#  error "HfTime: no implementation for this target — set HF_TARGET_MCU_* (see McuSelect.h)"
#endif
 
namespace hf_time {
 
inline std::uint64_t MonotonicMs() noexcept {
    return MonotonicUs() / 1000ULL;
}
 
inline std::uint64_t ElapsedUs(std::uint64_t t0) noexcept {
    return MonotonicUs() - t0;
}
 
}  // namespace hf_time