Reentrancy: Introduce adns__cancel

[adns] / src / internal.h

diff --git a/src/internal.h b/src/internal.h
index 7faa2123c4abe4bffec95183ed607c0ed1551536..d53ea5f3a93c40542d1fc06e15904f9710521eda 100644 (file)
--- a/src/internal.h
+++ b/src/internal.h
@@ -217,6 +217,12 @@ typedef struct typeinfo {
   /* Return the output resource-record element size; if this is null, then
    * the rrsz member can be used.
    */
   /* Return the output resource-record element size; if this is null, then
    * the rrsz member can be used.
    */

+
+  void (*query_send)(adns_query qu, struct timeval now);
+  /* Send the query to nameservers, and hook it into the appropriate queue.
+   * Normal behaviour is to call adns__query_send, but this can be overridden
+   * for special effects.
+   */

 } typeinfo;
 
 adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags,
 } typeinfo;
 
 adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags,


@@ -595,6 +601,7 @@ void adns__query_send(adns_query qu, struct timeval now);
 /* From query.c: */
 
 adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
 /* From query.c: */
 
 adns_status adns__internal_submit(adns_state ads, adns_query *query_r,

+                                 adns_query parent,

                                  const typeinfo *typei, adns_rrtype type,
                                  vbuf *qumsg_vb, int id,
                                  adns_queryflags flags, struct timeval now,
                                  const typeinfo *typei, adns_rrtype type,
                                  vbuf *qumsg_vb, int id,
                                  adns_queryflags flags, struct timeval now,


@@ -672,6 +679,10 @@ void adns__transfer_interim(adns_query from, adns_query to, void *block);
  * TTLs get inherited by their parents.
  */
 
  * TTLs get inherited by their parents.
  */
 

+void adns__free_interim(adns_query qu, void *p);
+/* Forget about a block allocated by adns__alloc_interim.
+ */
+

 void *adns__alloc_mine(adns_query qu, size_t sz);
 /* Like _interim, but does not record the length for later
  * copying into the answer.  This just ensures that the memory
 void *adns__alloc_mine(adns_query qu, size_t sz);
 /* Like _interim, but does not record the length for later
  * copying into the answer.  This just ensures that the memory


@@ -693,8 +704,14 @@ void adns__reset_preserved(adns_query qu);
  * in a datagram and discover that we need to retry the query.
  */
 
  * in a datagram and discover that we need to retry the query.
  */
 

+void adns__cancel(adns_query qu);

 void adns__query_done(adns_query qu);
 void adns__query_fail(adns_query qu, adns_status stat);
 void adns__query_done(adns_query qu);
 void adns__query_fail(adns_query qu, adns_status stat);

+void adns__cancel_children(adns_query qu);
+
+void adns__returning(adns_state ads, adns_query qu);
+/* Must be called before returning from adns any time that we have
+ * progressed (including made, finished or destroyed) queries. */

 
 /* From reply.c: */
 
 
 /* From reply.c: */
 


@@ -860,6 +877,7 @@ void adns__autosys(adns_state ads, struct timeval now);
 
 void adns__must_gettimeofday(adns_state ads, const struct timeval **now_io,
                             struct timeval *tv_buf);
 
 void adns__must_gettimeofday(adns_state ads, const struct timeval **now_io,
                             struct timeval *tv_buf);

+/* Call with care - might reentrantly cause queries to be completed! */

 
 int adns__pollfds(adns_state ads, struct pollfd pollfds_buf[MAX_POLLFDS]);
 void adns__fdevents(adns_state ads,
 
 int adns__pollfds(adns_state ads, struct pollfd pollfds_buf[MAX_POLLFDS]);
 void adns__fdevents(adns_state ads,