#include <chrono>

Public Types
using	duration = std::chrono::nanoseconds

using	period = duration::period

using	rep = duration::rep

using	time_point = std::chrono::time_point< high_resolution_clock >

Static Public Member Functions
static time_point	now () noexcept

Static Public Attributes
static constexpr const bool	is_steady { true }

Detailed Description

Definition at line 197 of file chrono.

Member Typedef Documentation

◆ duration

using os::estd::chrono::high_resolution_clock::duration = std::chrono::nanoseconds

Definition at line 200 of file chrono.

◆ period

using os::estd::chrono::high_resolution_clock::period = duration::period

Definition at line 202 of file chrono.

◆ rep

using os::estd::chrono::high_resolution_clock::rep = duration::rep

Definition at line 201 of file chrono.

◆ time_point

using os::estd::chrono::high_resolution_clock::time_point = std::chrono::time_point<high_resolution_clock>

Definition at line 203 of file chrono.

Member Function Documentation

◆ now()

high_resolution_clock::time_point os::estd::chrono::high_resolution_clock::now ( )

staticnoexcept

Definition at line 104 of file chrono.cpp.

      {
        auto cycles = rtos::hrclock.now ();
 
#pragma GCC diagnostic push
#if defined(__clang__)
// error: 'long long' is incompatible with C++98
// [-Werror,-Wc++98-compat-pedantic]
#pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
#endif
        // The duration is the number of sum of SysTick ticks plus the current
        // count of CPU cycles (computed from the SysTick counter).
        // Notice: a more exact solution would be to compute
        // ticks * divisor + cycles, but this severely reduces the
        // range of ticks.
        return time_point{
          duration{
              duration{ cycles * 1000000000ULL
                        / rtos::hrclock.input_clock_frequency_hz () }
              + realtime_clock::startup_time_point.time_since_epoch () } //
        };
#pragma GCC diagnostic pop
      }

References os::rtos::hrclock, os::rtos::clock_highres::input_clock_frequency_hz(), os::rtos::clock_highres::now(), and os::estd::chrono::realtime_clock::startup_time_point.

Member Data Documentation

◆ is_steady

constexpr const bool os::estd::chrono::high_resolution_clock::is_steady { true }

staticconstexpr

Definition at line 206 of file chrono.

The documentation for this class was generated from the following files:

Public Types

Static Public Member Functions

Static Public Attributes