X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Ftraverse.c;h=f8a2504dcd61489eb23bf7b84c8e0a88ced07f43;hp=06f0bc68ee4016b5a90330025f1c2ee34d1ad108;hb=dc9da1e34fe6a9d113fd57e116ebbc6d5bd54819;hpb=c02f63e60ca4c9778a1e635ffcd07d17fc8bf09d;ds=sidebyside

diff --git a/ccan/tdb2/traverse.c b/ccan/tdb2/traverse.c
index 06f0bc68..f8a2504d 100644
--- a/ccan/tdb2/traverse.c
+++ b/ccan/tdb2/traverse.c
@@ -18,7 +18,10 @@
 #include "private.h"
 #include <ccan/likely/likely.h>
 
-int64_t tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *p)
+int64_t tdb_traverse_(struct tdb_context *tdb,
+		      int (*fn)(struct tdb_context *,
+				TDB_DATA, TDB_DATA, void *),
+		      void *p)
 {
 	enum TDB_ERROR ecode;
 	struct traverse_info tinfo;
@@ -34,55 +37,63 @@ int64_t tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *p)
 		count++;
 		if (fn && fn(tdb, k, d, p)) {
 			free(k.dptr);
-			break;
+			tdb->last_error = TDB_SUCCESS;
+			return count;
 		}
 		free(k.dptr);
 	}
 
 	if (ecode != TDB_ERR_NOEXIST) {
-		tdb->ecode = ecode;
-		return -1;
+		return tdb->last_error = ecode;
 	}
+	tdb->last_error = TDB_SUCCESS;
 	return count;
 }
 	
-TDB_DATA tdb_firstkey(struct tdb_context *tdb)
+enum TDB_ERROR tdb_firstkey(struct tdb_context *tdb, struct tdb_data *key)
 {
 	struct traverse_info tinfo;
-	struct tdb_data k;
-	enum TDB_ERROR ecode;
 
-	ecode = first_in_hash(tdb, &tinfo, &k, NULL);
-	if (ecode == TDB_SUCCESS) {
-		return k;
-	}
-	if (ecode == TDB_ERR_NOEXIST)
-		ecode = TDB_SUCCESS;
-	tdb->ecode = ecode;
-	return tdb_null;
+	return tdb->last_error = first_in_hash(tdb, &tinfo, key, NULL);
 }
 
 /* We lock twice, not very efficient.  We could keep last key & tinfo cached. */
-TDB_DATA tdb_nextkey(struct tdb_context *tdb, TDB_DATA key)
+enum TDB_ERROR tdb_nextkey(struct tdb_context *tdb, struct tdb_data *key)
 {
 	struct traverse_info tinfo;
 	struct hash_info h;
 	struct tdb_used_record rec;
-	enum TDB_ERROR ecode;
 
-	tinfo.prev = find_and_lock(tdb, key, F_RDLCK, &h, &rec, &tinfo);
+	tinfo.prev = find_and_lock(tdb, *key, F_RDLCK, &h, &rec, &tinfo);
+	free(key->dptr);
 	if (TDB_OFF_IS_ERR(tinfo.prev)) {
-		tdb->ecode = tinfo.prev;
-		return tdb_null;
+		return tdb->last_error = tinfo.prev;
 	}
 	tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_RDLCK);
 
-	ecode = next_in_hash(tdb, &tinfo, &key, NULL);
-	if (ecode == TDB_SUCCESS) {
-		return key;
-	}
-	if (ecode == TDB_ERR_NOEXIST)
-		ecode = TDB_SUCCESS;
-	tdb->ecode = ecode;
-	return tdb_null;
+	return tdb->last_error = next_in_hash(tdb, &tinfo, key, NULL);
+}
+
+static int wipe_one(struct tdb_context *tdb,
+		    TDB_DATA key, TDB_DATA data, enum TDB_ERROR *ecode)
+{
+	*ecode = tdb_delete(tdb, key);
+	return (*ecode != TDB_SUCCESS);
+}
+
+enum TDB_ERROR tdb_wipe_all(struct tdb_context *tdb)
+{
+	enum TDB_ERROR ecode;
+	int64_t count;
+
+	ecode = tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_WAIT, false);
+	if (ecode != TDB_SUCCESS)
+		return tdb->last_error = ecode;
+
+	/* FIXME: Be smarter. */
+	count = tdb_traverse(tdb, wipe_one, &ecode);
+	if (count < 0)
+		ecode = count;
+	tdb_allrecord_unlock(tdb, F_WRLCK);
+	return tdb->last_error = ecode;
 }