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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>
47 lines
1.2 KiB
C
47 lines
1.2 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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static void log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...)
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{
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unsigned int *count = tdb_get_logging_private(tdb);
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if (strstr(fmt, "spinlocks"))
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(*count)++;
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}
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/* The code should barf on TDBs created with rwlocks. */
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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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unsigned int log_count;
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struct tdb_logging_context log_ctx = { log_fn, &log_count };
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plan_tests(4);
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/* We should fail to open rwlock-using tdbs of either endian. */
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log_count = 0;
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tdb = tdb_open_ex("test/rwlock-le.tdb", 0, 0, O_RDWR, 0,
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&log_ctx, NULL);
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ok1(!tdb);
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ok1(log_count == 1);
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log_count = 0;
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tdb = tdb_open_ex("test/rwlock-be.tdb", 0, 0, O_RDWR, 0,
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&log_ctx, NULL);
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ok1(!tdb);
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ok1(log_count == 1);
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return exit_status();
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}
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