Update.

	* nscd/connections.c: Implement r/o sharing of nscd's cache with client
	processes via shared memory.
	* nscd/nscd-client.h: Likewise.
	* nscd/nscd.h: Likewise.
	* nscd/nscd_conf.c: Likewise.
	* nscd/nscd_getgr_r.c: Likewise.
	* nscd/nscd_getpw_r.c: Likewise.
	* nscd/nscd_gethst_r.c: Likewise.
	* nscd/nscd.conf: Add new config parameters.
	* nscd/Makefile (aux): Add nscd_helper.
	* nscd/nscd_helper.c: New file.
	* nscd/mem.c (gc): Indicate beginning and end of the gc cycle.

	* nscd/hstcache.c: Simplify a lot.  We cache only the request itself,
	no derived information.
	* connections.c (nscd_init): Fix bug in testing size of the persistent.

	* nis/Makefile (aux): Add nis_hash.
	* nis/nis_hash.c: New file.  Split out from nis_util.c.
	* nis/nis_util.c: Move __nis_hash code in separate file.

	* csu/tst-atomic.c: Improve atomic_increment_val test which would
	not have found a ppc bug.

1 files changed, 11 insertions, 0 deletions

diff --git a/nscd/mem.c b/nscd/mem.c
index a4e30535c8..5207efc2de 100644
--- a/nscd/mem.c
+++ b/nscd/mem.c
@@ -230,6 +230,12 @@ gc (struct database_dyn *db)
     ++next_data;
 
 
+  /* Now we start modifying the data.  Make sure all readers of the
+     data are aware of this and temporarily don't use the data.  */
+  ++db->head->gc_cycle;
+  assert ((db->head->gc_cycle & 1) == 1);
+
+
   /* We do not perform the move operations right away since the
      he_data array is not sorted by the address of the data.  */
   struct moveinfo
@@ -445,6 +451,11 @@ gc (struct database_dyn *db)
     msync (db->head, db->data + db->head->first_free - (char *) db->head,
 	   MS_ASYNC);
 
+
+  /* Now we are done modifying the data.  */
+  ++db->head->gc_cycle;
+  assert ((db->head->gc_cycle & 1) == 0);
+
   /* We are done.  */
  out:
   pthread_mutex_unlock (&db->memlock);