kv_do infine loop when when kv has more than 1 item

Question

I have tried to use kv_t to store some data without success. I have also tried to the examples forum.c & kv.c. forum.c hangs when trying to create the second Forum thread while kv.c crashes.s.

When I have 1 item added to the kv, kv_do will succeed. After adding the second item, trying to call kv_do will result in an infinite loop and the data doesn`t seem valid too.

#include "stdio.h"
int list_threads(kv_item *item, xbuf_t *reply)
{
  Thread *thread = (Thread*)item->val;

  xbuf_t thread_li;
  xbuf_init(&thread_li);

  //using sprintf-like formatting
  xbuf_xcat(&thread_li, 
  "<li>"
   "<a href='/?forum_simple/act=t/id=%llu'>%s</a> (%lu)"
  "</li>",
  thread->id, thread->title.ptr, thread->posts.nbr_items
  );

  char *pos = (char*)xbuf_findstr(reply, "<!--tpl-->");
  if (pos) xbuf_insert(reply, pos, thread_li.len, thread_li.ptr);
  printf("-----------listing threads------\n");
  xbuf_free(&thread_li);

  return 1;
}

The code above is from forum.c. trying after creating the first forum Thread, trying to create the second one will hang because the list_threads function if invoked infinitely. the ---------listing threads----------- is getting printed on the terminal infinitely

Answer 1

Another user recently reported (see "newest" G-WAN questions) a crash with kv_do and it seems to be related to the atomic primitives implementation rather than about the kv code.

A workaround will be issued once the problem has been isolated.