Function allocate_timer

src/platforms/arm/samd/isr_samd.hpp:165–181

Allocate a free timer

// Allocate a free timer
static bool allocate_timer(u8& timer_idx) FL_NOEXCEPT {
    // Critical section: prevent interrupt from modifying allocation state
    __disable_irq();

    bool found = false;
    for (u8 i = MIN_TIMER_INDEX; i <= MAX_TIMER_INDEX; i++) {
        if (!timer_allocated[i]) {
            timer_allocated[i] = true;
            timer_idx = i;
            found = true;
            break;
        }
    }

    __enable_irq();
    return found;
}

// Free a timer
static void free_timer(u8 timer_idx) FL_NOEXCEPT {