Tests for various clock.h functions in WSL

clockid_wsl_test.cpp

#include <time.h>
#include <iostream>

void test_clockid(clockid_t clockid)
{
    struct timespec res;
    struct timespec time;
    struct timespec sleep;
    struct timespec remainder;
    
    sleep.tv_sec = 0;
    sleep.tv_nsec = 100000000;
    
    int retVal;
    
    retVal = clock_getres(clockid, &res);
    int errsv = errno;
    std::cerr << "clock_getres return value: " << retVal << " with errno " << errsv << std::endl;
    
    retVal = clock_gettime(clockid, &time);
    std::cerr << "clock_gettime return value: " << retVal << std::endl;
    
    retVal = clock_nanosleep(clockid, 0, &sleep, &remainder);
    std::cerr << "clock_nanosleep return value: " << retVal << std::endl;
    
}

int main(int argc, char **argv) 
{
    std::cerr << "Error macros values: " << std::endl;
    std::cerr << "EINTR : " << EINTR  << std::endl;
    std::cerr << "EINVAL: " << EINVAL << std::endl;
    std::cerr << "ENOTSUP: " << ENOTSUP << std::endl;
    std::cerr << "Testing CLOCK_MONOTONIC " << std::endl;
    test_clockid(CLOCK_MONOTONIC);
    std::cerr << "Testing CLOCK_REALTIME " << std::endl;
    test_clockid(CLOCK_REALTIME);
    std::cerr << "Testing CLOCK_PROCESS_CPUTIME_ID " << std::endl;
    test_clockid(CLOCK_PROCESS_CPUTIME_ID);
    std::cerr << "Testing CLOCK_THREAD_CPUTIME_ID  " << std::endl;
    test_clockid(CLOCK_THREAD_CPUTIME_ID );
    
    return 0;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
project(clockid_wsl_test)
set(CMAKE_CXX_STANDARD 11)
add_executable(${PROJECT_NAME} ${PROJECT_NAME}.cpp)