Arduino millis() disable, enable and compensation

MillisUtils.cpp

#include <Arduino.h>
// See: https://github.com/ArminJo/Arduino-Utils/blob/master/src/MillisUtils.cpp
/*
 * storage for millis value to enable compensation for interrupt disable at signal acquisition etc.
 */
#if ( defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) )
#define timer0_millis millis_timer_millis // The ATTinyCore libraries use other variable name in wiring.c
#endif
#if defined(TIMSK) && !defined(TIMSK0) // some ATtinys
#define TIMSK0 TIMSK
#endif

extern volatile unsigned long timer0_millis; // ATmega328P
...
    /*
     * disable Timer0 (millis()) overflow interrupt
     * since the loop last exactly a multiple of 1024 micros, add a few statements between disabling and enabling
     */
void disableMillisInterrupt() {
    _SFR_BYTE(TIMSK0) &= ~_BV(TOIE0);
}
    /*
     * enable timer 0 overflow interrupt and compensate for disabled timer, if still disabled.
     */
void enableMillisInterrupt(uint16_t aMillisToAddForCompensation) {
    if ((TIMSK0 & _BV(TOIE0)) == 0) { 
        // still disabled -> compensate
        timer0_millis += aMillisToAddForCompensation;
    }
    _SFR_BYTE(TIMSK0) |= _BV(TOIE0);
}

void delayMilliseconds(unsigned int aMillis) {
    for (unsigned int i = 0; i < aMillis; ++i) {
        delayMicroseconds(1000);
    }
}