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This adds optional support for locking based on shared robust mutexes. The caller can use the TDB_MUTEX_LOCKING flag together with TDB_CLEAR_IF_FIRST after verifying with tdb_runtime_check_for_robust_mutexes() that it's supported by the current system. The caller should be aware that using TDB_MUTEX_LOCKING implies some limitations, e.g. it's not possible to have multiple read chainlocks on a given hash chain from multiple processes. Note: that this doesn't make tdb thread safe! Pair-Programmed-With: Stefan Metzmacher <metze@samba.org> Pair-Programmed-With: Michael Adam <obnox@samba.org> Signed-off-by: Volker Lendecke <vl@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
#include "../common/tdb_private.h"
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#include "../common/io.c"
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#include "../common/tdb.c"
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#include "../common/lock.c"
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#include "../common/freelist.c"
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#include "../common/traverse.c"
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#include "../common/transaction.c"
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#include "../common/error.c"
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#include "../common/open.c"
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#include "../common/check.c"
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#include "../common/hash.c"
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#include "../common/mutex.c"
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#include "tap-interface.h"
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#include <stdlib.h>
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#include <stdbool.h>
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#include "logging.h"
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int main(int argc, char *argv[])
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{
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struct tdb_context *tdb;
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TDB_DATA key, data;
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plan_tests(27);
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key.dsize = strlen("hi");
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key.dptr = discard_const_p(uint8_t, "hi");
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tdb = tdb_open_ex("run-nested-transactions.tdb",
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1024, TDB_CLEAR_IF_FIRST|TDB_DISALLOW_NESTING,
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O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
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ok1(tdb);
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/* Nesting disallowed. */
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ok1(tdb_transaction_start(tdb) == 0);
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data.dptr = discard_const_p(uint8_t, "world");
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data.dsize = strlen("world");
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ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
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data = tdb_fetch(tdb, key);
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ok1(data.dsize == strlen("world"));
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ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
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free(data.dptr);
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ok1(tdb_transaction_start(tdb) != 0);
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ok1(tdb_error(tdb) == TDB_ERR_NESTING);
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data = tdb_fetch(tdb, key);
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ok1(data.dsize == strlen("world"));
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ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
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free(data.dptr);
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ok1(tdb_transaction_commit(tdb) == 0);
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data = tdb_fetch(tdb, key);
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ok1(data.dsize == strlen("world"));
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ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
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free(data.dptr);
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tdb_close(tdb);
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/* Nesting allowed by default */
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tdb = tdb_open_ex("run-nested-transactions.tdb",
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1024, TDB_DEFAULT, O_RDWR, 0, &taplogctx, NULL);
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ok1(tdb);
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ok1(tdb_transaction_start(tdb) == 0);
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ok1(tdb_transaction_start(tdb) == 0);
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ok1(tdb_delete(tdb, key) == 0);
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ok1(tdb_transaction_commit(tdb) == 0);
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ok1(!tdb_exists(tdb, key));
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ok1(tdb_transaction_cancel(tdb) == 0);
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/* Surprise! Kills inner "committed" transaction. */
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ok1(tdb_exists(tdb, key));
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ok1(tdb_transaction_start(tdb) == 0);
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ok1(tdb_transaction_start(tdb) == 0);
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ok1(tdb_delete(tdb, key) == 0);
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ok1(tdb_transaction_commit(tdb) == 0);
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ok1(!tdb_exists(tdb, key));
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ok1(tdb_transaction_commit(tdb) == 0);
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ok1(!tdb_exists(tdb, key));
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tdb_close(tdb);
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return exit_status();
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}
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