Add support for deleting per-network DNS resolver caches.
This is required when the possible range of NetIds is large to
prevent netd consuming excessive amounts of memory.
This required replacing the per-cache locks in favor of a single
global lock to prevent accesses to deleted caches.
Change-Id: I99d058bafea5de743e56075dbed74031da4df63f
diff --git a/libc/dns/include/resolv_cache.h b/libc/dns/include/resolv_cache.h
index 16f3e43..e049d95 100644
--- a/libc/dns/include/resolv_cache.h
+++ b/libc/dns/include/resolv_cache.h
@@ -32,11 +32,6 @@
#include <sys/cdefs.h>
struct __res_state;
-struct resolv_cache; /* forward */
-
-/* Gets the cache for a network. Returned cache might be NULL. */
-__LIBC_HIDDEN__
-extern struct resolv_cache* __get_res_cache(unsigned netid);
/* sets the name server addresses to the provided res_state structure. The
* name servers are retrieved from the cache which is associated
@@ -53,7 +48,7 @@
__LIBC_HIDDEN__
extern ResolvCacheStatus
-_resolv_cache_lookup( struct resolv_cache* cache,
+_resolv_cache_lookup( unsigned netid,
const void* query,
int querylen,
void* answer,
@@ -65,7 +60,7 @@
*/
__LIBC_HIDDEN__
extern void
-_resolv_cache_add( struct resolv_cache* cache,
+_resolv_cache_add( unsigned netid,
const void* query,
int querylen,
const void* answer,
@@ -74,7 +69,7 @@
/* Notify the cache a request failed */
__LIBC_HIDDEN__
extern void
-_resolv_cache_query_failed( struct resolv_cache* cache,
+_resolv_cache_query_failed( unsigned netid,
const void* query,
int querylen);