C++ calling a method in specified interval without sleep - c++

Question

I need to execute multiple methods with specified interval(1 millisecond). Is there any way to call the methods in a loop without sleep because I am not getting 1000 entries in a log file for a second
Currently I have implemented using sleep. Data collection also might take little time.
#include <iostream>
#include <string>
#include <unordered_map>
#include <functional>
#include <csignal>
#include <chrono>
#include <thread>
#include <fstream>
#include <ctime>
#include <iomanip>
#include <sstream>
#include <windows.h>
#include <atomic>
volatile std::sig_atomic_t gStatus{};
void signalHandler(int sig) {
gStatus = sig;
}
void feature1(std::string &output) { output = "feature1"; }
void feature2(std::string &output) { output = "feature2"; }
void feature3(std::string &output) { output = "feature3"; }
void feature4(std::string &output) { output = "feature4"; }
void feature5(std::string &output) { output = "feature5"; }
void feature6(std::string &output) { output = "feature6"; }
void processInfoRequest(std::string logFile, std::unordered_map<std::string, std::function<void(std::string &value)>> methodMap)
{
std::ofstream ofs(logFile);
std::uint64_t prevTime = 0, curTime = 0, diffTime = 0, tmpTime = 0, scheduleTime = 0, pollPeriod = 1;
prevTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
while (gStatus != SIGINT)
{
prevTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
prevTime = prevTime - scheduleTime;
**//get value**
auto timenow = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
ofs << ctime(&timenow);
for(auto it : methodMap)
{
std::string output;
it.second(output);
ofs << output << ",";
}
ofs << "\n";
curTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
diffTime = curTime - prevTime;
if (diffTime < pollPeriod)
{
diffTime = pollPeriod - diffTime;
curTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
std::uint64_t i = 0;
std::uint64_t n = diffTime / 10;
std::uint64_t remainingMs = diffTime % 10;
for (i = 0; i < n; i++)
{
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
std::this_thread::sleep_for(std::chrono::milliseconds(remainingMs));
tmpTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
scheduleTime = tmpTime - (curTime + diffTime);
}
else
{
scheduleTime = 0;
}
}
ofs.close();
}
int main()
{
std::signal(SIGINT, signalHandler);
std::string output;
std::unordered_map<std::string, std::function<void(std::string &value)>> methodMap = {
{"f1", feature1},
{"f2", feature2},
{"f3", feature3},
{"f4", feature4},
{"f5", feature5},
{"f6", feature6}
};
std::thread th1 = std::thread(processInfoRequest, "threadlog.csv", methodMap);
if (th1.joinable())
th1.join();
return 0;
}