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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>
52 lines
1.1 KiB
C
52 lines
1.1 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/rescue.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 "logging.h"
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#define NUM 20
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/* Binary searches are deceptively simple: easy to screw up! */
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int main(int argc, char *argv[])
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{
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unsigned int i, j, n;
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struct found f[NUM+1];
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struct found_table table;
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/* Set up array for searching. */
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for (i = 0; i < NUM+1; i++) {
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f[i].head = i * 3;
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}
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table.arr = f;
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for (i = 0; i < NUM; i++) {
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table.num = i;
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for (j = 0; j < (i + 2) * 3; j++) {
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n = find_entry(&table, j);
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ok1(n <= i);
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/* If we were searching for something too large... */
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if (j > i*3)
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ok1(n == i);
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else {
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/* It must give us something after j */
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ok1(f[n].head >= j);
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ok1(n == 0 || f[n-1].head < j);
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}
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}
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}
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return exit_status();
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}
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