tdb2: add lib/tdb2 (from CCAN init-1161-g661d41f)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 71 insertions, 0 deletions

diff --git a/lib/tdb2/test/run-50-multiple-freelists.c b/lib/tdb2/test/run-50-multiple-freelists.c
new file mode 100644
index 0000000000..7a48c3e0ee
--- /dev/null
+++ b/lib/tdb2/test/run-50-multiple-freelists.c
@@ -0,0 +1,71 @@
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tap/tap.h>
+#include <ccan/tdb2/transaction.c>
+#include "logging.h"
+#include "layout.h"
+
+int main(int argc, char *argv[])
+{
+	tdb_off_t off;
+	struct tdb_context *tdb;
+	struct tdb_layout *layout;
+	TDB_DATA key, data;
+
+	plan_tests(11);
+	key = tdb_mkdata("Hello", 5);
+	data = tdb_mkdata("world", 5);
+
+	/* Create a TDB with three free tables. */
+	layout = new_tdb_layout(NULL);
+	tdb_layout_add_freetable(layout);
+	tdb_layout_add_freetable(layout);
+	tdb_layout_add_freetable(layout);
+	tdb_layout_add_free(layout, 80, 0);
+	/* Used record prevent coalescing. */
+	tdb_layout_add_used(layout, key, data, 6);
+	tdb_layout_add_free(layout, 160, 1);
+	key.dsize--;
+	tdb_layout_add_used(layout, key, data, 7);
+	tdb_layout_add_free(layout, 320, 2);
+	key.dsize--;
+	tdb_layout_add_used(layout, key, data, 8);
+	tdb_layout_add_free(layout, 40, 0);
+	tdb = tdb_layout_get(layout);
+	ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+	off = get_free(tdb, 0, 80 - sizeof(struct tdb_used_record), 0,
+		       TDB_USED_MAGIC, 0);
+	ok1(off == layout->elem[3].base.off);
+	ok1(tdb->ftable_off == layout->elem[0].base.off);
+
+	off = get_free(tdb, 0, 160 - sizeof(struct tdb_used_record), 0,
+		       TDB_USED_MAGIC, 0);
+	ok1(off == layout->elem[5].base.off);
+	ok1(tdb->ftable_off == layout->elem[1].base.off);
+
+	off = get_free(tdb, 0, 320 - sizeof(struct tdb_used_record), 0,
+		       TDB_USED_MAGIC, 0);
+	ok1(off == layout->elem[7].base.off);
+	ok1(tdb->ftable_off == layout->elem[2].base.off);
+
+	off = get_free(tdb, 0, 40 - sizeof(struct tdb_used_record), 0,
+		       TDB_USED_MAGIC, 0);
+	ok1(off == layout->elem[9].base.off);
+	ok1(tdb->ftable_off == layout->elem[0].base.off);
+
+	/* Now we fail. */
+	off = get_free(tdb, 0, 0, 1, TDB_USED_MAGIC, 0);
+	ok1(off == 0);
+
+	tdb_close(tdb);
+	tdb_layout_free(layout);
+
+	ok1(tap_log_messages == 0);
+	return exit_status();
+}