Make cach'ing work with threads now, there are now three cases:

    - Use a global dns cache (via setting the tentatively named,
    CURLOPT_DNS_USE_GLOBAL_CACHE option to true)
    - Use a per-handle dns cache, by default
    - Use a pooled dns cache when in the "multi" interface

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/url.c b/lib/url.c
index 5f7568005..56e7fa73f 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -284,6 +284,15 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option, ...)
   va_start(param, option);
 
   switch(option) {
+    case CURLOPT_DNS_USE_GLOBAL_CACHE: {
+      int use_cache = va_arg(param, int);
+      if (use_cache) {
+        Curl_global_host_cache_init();
+      }
+
+      data->set.global_dns_cache = use_cache;
+    }
+    break;
   case CURLOPT_SSL_CIPHER_LIST:
     /* set a list of cipher we want to use in the SSL connection */
     data->set.ssl.cipher_list = va_arg(param, char *);