tdb2: allow multiple opens of the same file.

[ccan] / ccan / tdb2 / test / run-open-multiple-times.c

diff --git a/ccan/tdb2/test/run-open-multiple-times.c b/ccan/tdb2/test/run-open-multiple-times.c
new file mode 100644 (file)
index 0000000..1f35648
--- /dev/null
+++ b/ccan/tdb2/test/run-open-multiple-times.c
@@ -0,0 +1,87 @@
+#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/tdb2/transaction.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+int main(int argc, char *argv[])
+{
+       unsigned int i;
+       struct tdb_context *tdb, *tdb2;
+       struct tdb_data key = { (unsigned char *)&i, sizeof(i) };
+       struct tdb_data data = { (unsigned char *)&i, sizeof(i) };
+       struct tdb_data d = { NULL, 0 }; /* Bogus GCC warning */
+       int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
+                       TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
+
+       plan_tests(sizeof(flags) / sizeof(flags[0]) * 28);
+       for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+               tdb = tdb_open("run-open-multiple-times.tdb", flags[i],
+                              O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
+               ok1(tdb);
+               if (!tdb)
+                       continue;
+               tdb2 = tdb_open("run-open-multiple-times.tdb", flags[i],
+                               O_RDWR|O_CREAT, 0600, &tap_log_attr);
+               ok1(tdb_check(tdb, NULL, NULL) == 0);
+               ok1(tdb_check(tdb2, NULL, NULL) == 0);
+
+               /* Store in one, fetch in the other. */
+               ok1(tdb_store(tdb, key, data, TDB_REPLACE) == 0);
+               ok1(tdb_fetch(tdb2, key, &d) == TDB_SUCCESS);
+               ok1(d.dptr && d.dsize == data.dsize
+                   && memcmp(d.dptr, data.dptr, d.dsize) == 0);
+               free(d.dptr);
+
+               /* Vice versa, with delete. */
+               ok1(tdb_delete(tdb2, key) == 0);
+               ok1(tdb_fetch(tdb, key, &d) == TDB_ERR_NOEXIST);
+
+               /* OK, now close first one, check second still good. */
+               ok1(tdb_close(tdb) == 0);
+
+               ok1(tdb_store(tdb2, key, data, TDB_REPLACE) == 0);
+               ok1(tdb_fetch(tdb2, key, &d) == TDB_SUCCESS);
+               ok1(d.dptr && d.dsize == data.dsize
+                   && memcmp(d.dptr, data.dptr, d.dsize) == 0);
+               free(d.dptr);
+
+               /* Reopen */
+               tdb = tdb_open("run-open-multiple-times.tdb", flags[i],
+                              O_RDWR|O_CREAT, 0600, &tap_log_attr);
+               ok1(tdb);
+
+               ok1(tdb_transaction_start(tdb2) == 0);
+
+               /* Anything in the other one should fail. */
+               ok1(tdb_fetch(tdb, key, &d) == TDB_ERR_LOCK);
+               ok1(tap_log_messages == 1);
+               ok1(tdb_store(tdb, key, data, TDB_REPLACE) == TDB_ERR_LOCK);
+               ok1(tap_log_messages == 2);
+               ok1(tdb_transaction_start(tdb) == TDB_ERR_LOCK);
+               ok1(tap_log_messages == 3);
+               ok1(tdb_chainlock(tdb, key) == TDB_ERR_LOCK);
+               ok1(tap_log_messages == 4);
+
+               /* Transaciton should work as normal. */
+               ok1(tdb_store(tdb2, key, data, TDB_REPLACE) == TDB_SUCCESS);
+
+               /* Now... try closing with locks held. */
+               ok1(tdb_close(tdb2) == 0);
+
+               ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
+               ok1(d.dptr && d.dsize == data.dsize
+                   && memcmp(d.dptr, data.dptr, d.dsize) == 0);
+               free(d.dptr);
+               ok1(tdb_close(tdb) == 0);
+               ok1(tap_log_messages == 4);
+               tap_log_messages = 0;
+       }
+
+       return exit_status();
+}