addToList()

void CLEDController::addToList

(

)

Add this controller to the linked list.

Note

Used with DeferRegister mode to explicitly add controller to list (for example, fl::Channel via FastLED.add(ChannelPtr))

Safe to call multiple times - won't add if already in list

Definition at line 36 of file cled_controller.cpp.hpp.

                                            {
    // Don't add if already in list
    #if SKETCH_HAS_LARGE_MEMORY // Mostly for AVR, the isInList() check adds memory overhead on these tight platforms.
    if (isInList()) {
        return;
    }
    #endif
 
    // Append by walking from the head: registration is rare and lists are
    // short, so no tail pointer is stored (#4788).
    if (mPHead == nullptr) {
        mPHead = this;
        return;
    }
    // The walk also catches a repeat registration, which would otherwise
    // create a cycle (AVR skips the isInList() check above).
    CLEDController* last = mPHead;
    while (true) {
        if (last == this) {
            return;
        }
        if (last->mPNext == nullptr) {
            break;
        }
        last = last->mPNext;
    }
    last->mPNext = this;
}

References CLEDController(), fl::FL_NO_EXCEPT, isInList(), mPHead, and mPNext.

Referenced by CLEDController(), CLEDController(), and fl::Channel::addToDrawList().

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