Периодическое выполнение определенного кода в программе с задержкой

while (1)
{
    /* do smth. */
    Sleep(1000);
}

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
 
#define MAX_BOTTLES (99)
#define PAUSE_SECONDS (2)
 
int bottles = MAX_BOTTLES;
void get_bottle(int signum) {
    if ( bottles ) {
        printf("%d bottles of beer on the wall, %d bottles of beer...\n", bottles, bottles);
        bottles -= 1;
        printf("Take one down and pass it around, %d bottles of beer on the wall.\n\n", bottles);
    }
    else {
        printf("No one bottle of beer on the wall, no one bottle of beer...\n");
        bottles = MAX_BOTTLES;
        printf("Go to the store and buy some more, %d bottles of beer on the wall.\n\n", bottles);
    }
    alarm(PAUSE_SECONDS);
}
 
int main(void) {
    signal(SIGALRM, get_bottle);
    alarm(PAUSE_SECONDS);
    getchar();
}

#include <stdio.h>
#include <windows.h>
 
#define MAX_BOTTLES (99)
int bottles = MAX_BOTTLES;
VOID CALLBACK TimerProc(HWND hWnd, UINT nMsg, UINT nIDEvent, DWORD dwTime) {
    if (bottles) {
        printf("%d bottles of beer on the wall, %d bottles of beer...\n", bottles, bottles);
        bottles -= 1;
        printf("Take one down and pass it around, %d bottles of beer on the wall.\n\n", bottles);
    } else {
        printf("No one bottle of beer on the wall, no one bottle of beer...\n");
        bottles = MAX_BOTTLES;
        printf("Go to the store and buy some more, %d bottles of beer on the wall.\n\n", bottles);
    }
}
 
int main(int argc, char *argv[], char *envp[]) {
    MSG msg;
    SetTimer(NULL, 0, 2000, TimerProc);
    while (GetMessage(&msg, NULL, 0, 0)) {
        DispatchMessage(&msg);
    }
}

#include <stdio.h>
#include <windows.h>
 
#define MAX_BOTTLES (99)
int bottles = MAX_BOTTLES;
VOID CALLBACK TimerProc(UINT timerId, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2) {
    if (bottles) {
        printf("%d bottles of beer on the wall, %d bottles of beer...\n", bottles, bottles);
        bottles -= 1;
        printf("Take one down and pass it around, %d bottles of beer on the wall.\n\n", bottles);
    } else {
        printf("No one bottle of beer on the wall, no one bottle of beer...\n");
        bottles = MAX_BOTTLES;
        printf("Go to the store and buy some more, %d bottles of beer on the wall.\n\n", bottles);
    }
}
 
int main(int argc, char *argv[], char *envp[]) {
    MSG msg;
    timeSetEvent(2000, 0, TimerProc, 0, TIME_PERIODIC);
    getchar();
}

#include <time.h>
#include <stdio.h>
#include <threads.h>
 
int __cdecl timerproc(void *arg) {
    struct timespec duration = {.tv_sec = 1, .tv_nsec = 0};
 
    while(1) {
        printf("%s\n", (char*)arg);
        if(thrd_sleep(&duration, NULL) != thrd_success)
            printf("\tInterrupted!\n");
    }
 
    return 0;
}
 
int main(void) {
    volatile int i = 0;
    char text[20];
    thrd_t proc;
    struct timespec duration = {.tv_sec = 0, .tv_nsec = 5000000000L};
 
    sprintf(text, "Time: %d", i++);
    thrd_create(&proc, timerproc, text);
    while(1) {
        thrd_sleep(&duration, NULL);
        sprintf(text, "Time: %d", i++);
    }
 
    return 0;
}