xiaoxiang781216 commented on code in PR #21126:
URL: https://github.com/apache/nuttx/pull/21126#discussion_r4419610574
##########
libs/libc/netdb/lib_resinit.c:
##########
@@ -49,5 +69,61 @@
int res_init(void)
{
+ FAR struct __res_state *res = __res_state();
+
+ /* The defaults of BIND for the fields that the program did not set.
+ * NuttX's resolver does not use them.
+ */
+
+ if (res->retrans == 0)
+ {
+ res->retrans = RES_TIMEOUT;
+ }
+
+ if (res->retry == 0)
+ {
+ res->retry = RES_DFLRETRY;
+ }
+
+ if ((res->options & RES_INIT) == 0)
+ {
+ res->options = RES_DEFAULT;
+ res->ndots = 1;
+ }
+
+ res->options |= RES_INIT;
return 0;
}
+
+/****************************************************************************
+ * Name: __res_state
+ *
+ * Description:
+ * Give the resolver state of the process (the _res of <resolv.h>). In
+ * the FLAT and PROTECTED builds it is the state of the task group,
+ * which is allocated at the first call.
+ *
+ ****************************************************************************/
+
+FAR struct __res_state *__res_state(void)
+{
+#ifndef CONFIG_BUILD_KERNEL
+ FAR struct task_info_s *info = task_get_info();
+ FAR struct __res_state *res;
+
+ DEBUGASSERT(info != NULL);
+
+ nxrmutex_lock(&info->ta_lock);
+ if (info->ta_res == NULL)
+ {
+ info->ta_res = lib_zalloc(sizeof(struct __res_state));
+ }
+
+ res = info->ta_res;
+ nxrmutex_unlock(&info->ta_lock);
+
+ return res != NULL ? res : &g_res;
+#else
+ return &g_res;
Review Comment:
can we share the same code path for the different mode
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