$NetBSD: patch-ae,v 1.8 2011/11/13 16:59:58 tnn Exp $

--- mozilla/nsprpub/pr/src/misc/prnetdb.c.orig	2011-09-22 20:20:37.000000000 +0000
+++ mozilla/nsprpub/pr/src/misc/prnetdb.c
@@ -105,7 +105,7 @@ PRLock *_pr_dnsLock = NULL;
         || defined(AIX4_3_PLUS) || (defined(AIX) && defined(_THREAD_SAFE)) \
 	|| (defined(HPUX10_10) && defined(_REENTRANT)) \
         || (defined(HPUX10_20) && defined(_REENTRANT)) \
-        || defined(OPENBSD)
+        || defined(OPENBSD) || defined(NETBSD)
 #define _PR_HAVE_GETPROTO_R
 #define _PR_HAVE_GETPROTO_R_INT
 #endif
@@ -115,6 +115,11 @@ PRLock *_pr_dnsLock = NULL;
 #define _PR_HAVE_5_ARG_GETPROTO_R
 #endif
 
+#if __DragonFly_version >= 200202
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_5_ARG_GETPROTO_R
+#endif
+
 /* BeOS has glibc but not the glibc-style getprotobyxxx_r functions. */
 #if (defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(XP_BEOS))
 #define _PR_HAVE_GETPROTO_R
@@ -332,7 +337,7 @@ _pr_QueryNetIfs(void)
 }
 
 #elif (defined(DARWIN) && defined(HAVE_GETIFADDRS)) || defined(FREEBSD) \
-    || defined(NETBSD) || defined(OPENBSD)
+    || defined(NETBSD) || defined(OPENBSD) || defined(DRAGONFLY)
 
 /*
  * Use the BSD getifaddrs function.
@@ -2076,6 +2081,11 @@ PR_IMPLEMENT(PRAddrInfo *) PR_GetAddrInf
          */
         hints.ai_socktype = SOCK_STREAM;
 
+/* NetBSD >= 2.99.9 has a thread-safe resolver */
+#if defined(__NetBSD_Version__) && __NetBSD_Version__ < 299000900
+        LOCK_DNS();
+#endif
+
         rv = GETADDRINFO(hostname, NULL, &hints, &res);
 #ifdef AI_ADDRCONFIG
         if (rv == EAI_BADFLAGS && (hints.ai_flags & AI_ADDRCONFIG)) {
@@ -2083,6 +2093,11 @@ PR_IMPLEMENT(PRAddrInfo *) PR_GetAddrInf
             rv = GETADDRINFO(hostname, NULL, &hints, &res);
         }
 #endif
+
+#if defined(__NetBSD_Version__) && __NetBSD_Version__ < 299000900
+        UNLOCK_DNS();
+#endif
+
         if (rv == 0)
             return (PRAddrInfo *) res;