handleMessage

HandlerPoster

public boolean handleMessage(Message msg) {
    boolean rescheduled = false;
    // todo
}

上述 queue 的定义如下

PendingPostQueue

final class PendingPostQueue {
    @Nullable
    private PendingPost head;
    @Nullable
    private PendingPost tail;

    PendingPostQueue() {
    }

    synchronized void enqueue(PendingPost pendingPost) {
        if (pendingPost == null) {
        } else {
            if (this.tail != null) {
                this.tail.next = pendingPost;
                this.tail = pendingPost;
            } else {
                if (this.head != null) {
                    return;
                }

                this.head = this.tail = pendingPost;
            }

            this.notifyAll();
        }
    }

    synchronized PendingPost poll() {
        PendingPost pendingPost = this.head;
        if (this.head != null) {
            this.head = this.head.next;
            if (this.head == null) {
                this.tail = null;
            }
        }

        return pendingPost;
    }

    synchronized PendingPost poll(int maxMillisToWait) throws InterruptedException {
        if (this.head == null) {
            this.wait((long)maxMillisToWait);
        }

        return this.poll();
    }
}