mongoose/src/queue.h

#pragma once

#include "arch.h"  // For size_t

// Single producer, single consumer non-blocking queue

struct mg_queue {
  char *buf;
  size_t size;
  volatile size_t tail;
  volatile size_t head;
};

void mg_queue_init(struct mg_queue *, char *, size_t);        // Init queue
size_t mg_queue_book(struct mg_queue *, char **buf, size_t);  // Reserve space
void mg_queue_add(struct mg_queue *, size_t);                 // Add new message
size_t mg_queue_next(struct mg_queue *, char **);  // Get oldest message
void mg_queue_del(struct mg_queue *, size_t);      // Delete oldest message