MINOR: threads: set the tid, ltid and their bit in thread_cfg

This will be a convenient way to communicate the thread ID and its
local ID in the group, as well as their respective bits when creating
the threads or when only a pointer is given.

include/haproxy/tinfo-t.h

@@ -60,6 +60,8 @@ struct tgroup_info {
  */
 struct thread_info {
 	const struct tgroup_info *tg;     /* config of the thread-group this thread belongs to */
+	uint tid, ltid;                   /* process-wide and group-wide thread ID (start at 0) */
+	ulong tid_bit, ltid_bit;          /* bit masks for the tid/ltid */
 
 	/* pad to cache line (64B) */
 	char __pad[0];                    /* unused except to check remaining room */

src/thread.c

@@ -1075,6 +1075,14 @@ int thread_map_to_groups()
 		return -1;
 	}
 
+	for (t = 0; t < global.nbthread; t++) {
+		ha_thread_info[t].tid      = t;
+		ha_thread_info[t].ltid     = t - ha_thread_info[t].tg->base;
+
+		ha_thread_info[t].tid_bit  = 1UL << ha_thread_info[t].tid;
+		ha_thread_info[t].ltid_bit = 1UL << ha_thread_info[t].ltid;
+	}
+
 	return 0;
 }