@sema-agent/core/dist/core/push-queue.js

Stateless, task-oriented AI agent core

export class PushQueue {
    buffer = [];
    waiters = [];
    closed = false;
    push(value) {
        if (this.closed) {
            return false;
        }
        const waiter = this.waiters.shift();
        if (waiter) {
            waiter({ value, done: false });
        }
        else {
            this.buffer.push(value);
        }
        return true;
    }
    close() {
        this.closed = true;
        while (this.waiters.length > 0) {
            this.waiters.shift()({ value: undefined, done: true });
        }
    }
    async *[Symbol.asyncIterator]() {
        for (;;) {
            if (this.buffer.length > 0) {
                yield this.buffer.shift();
            }
            else if (this.closed) {
                return;
            }
            else {
                const r = await new Promise((resolve) => this.waiters.push(resolve));
                if (r.done) {
                    return;
                }
                yield r.value;
            }
        }
    }
}