tdb: implement tdb_summary.

[ccan] / ccan / tdb / tdb.h

diff --git a/ccan/tdb/tdb.h b/ccan/tdb/tdb.h
index 628118172e807ed10762f631bae0b8168fe37f38..070f09b4e19075e05f7bdfebff634d93fddcc89d 100644 (file)
--- a/ccan/tdb/tdb.h
+++ b/ccan/tdb/tdb.h
@@ -30,6 +30,14 @@
 extern "C" {
 #endif
 
+#ifndef _SAMBA_BUILD_
+/* For mode_t */
+#include <sys/types.h>
+/* For O_* flags. */
+#include <sys/stat.h>
+/* For sig_atomic_t. */
+#include <signal.h>
+#endif
 
 /* flags to tdb_store() */
 #define TDB_REPLACE 1          /* Unused */
@@ -47,14 +55,18 @@ extern "C" {
 #define TDB_NOSYNC   64 /* don't use synchronous transactions */
 #define TDB_SEQNUM   128 /* maintain a sequence number */
 #define TDB_VOLATILE   256 /* Activate the per-hashchain freelist, default 5 */
-#define TDB_NO_NESTING 512 /* Dont allow transaction nesting */
-
-#define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret)
+#define TDB_ALLOW_NESTING 512 /* Allow transactions to nest */
+#define TDB_DISALLOW_NESTING 1024 /* Disallow transactions to nest */
+#define TDB_INCOMPATIBLE_HASH 2048 /* Better hashing: can't be opened by older tdb versions. */
 
 /* error codes */
 enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK, 
                TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT,
-               TDB_ERR_NOEXIST, TDB_ERR_EINVAL, TDB_ERR_RDONLY};
+               TDB_ERR_NOEXIST, TDB_ERR_EINVAL, TDB_ERR_RDONLY,
+               TDB_ERR_NESTING};
+
+/* flags for tdb_summary. Logical or to combine. */
+enum tdb_summary_flags { TDB_SUMMARY_HISTOGRAMS = 1 };
 
 /* debugging uses one of the following levels */
 enum tdb_debug_level {TDB_DEBUG_FATAL = 0, TDB_DEBUG_ERROR, 
@@ -129,6 +141,7 @@ int tdb_fd(struct tdb_context *tdb);
 tdb_log_func tdb_log_fn(struct tdb_context *tdb);
 void *tdb_get_logging_private(struct tdb_context *tdb);
 int tdb_transaction_start(struct tdb_context *tdb);
+int tdb_transaction_prepare_commit(struct tdb_context *tdb);
 int tdb_transaction_commit(struct tdb_context *tdb);
 int tdb_transaction_cancel(struct tdb_context *tdb);
 int tdb_transaction_recover(struct tdb_context *tdb);
@@ -140,6 +153,10 @@ void tdb_add_flags(struct tdb_context *tdb, unsigned flag);
 void tdb_remove_flags(struct tdb_context *tdb, unsigned flag);
 void tdb_enable_seqnum(struct tdb_context *tdb);
 void tdb_increment_seqnum_nonblock(struct tdb_context *tdb);
+unsigned int tdb_jenkins_hash(TDB_DATA *key);
+int tdb_check(struct tdb_context *tdb,
+             int (*check)(TDB_DATA key, TDB_DATA data, void *private),
+             void *private);
 
 /* Low level locking functions: use with care */
 int tdb_chainlock(struct tdb_context *tdb, TDB_DATA key);
@@ -152,12 +169,16 @@ int tdb_chainlock_unmark(struct tdb_context *tdb, TDB_DATA key);
 
 void tdb_setalarm_sigptr(struct tdb_context *tdb, volatile sig_atomic_t *sigptr);
 
+/* wipe and repack */
+int tdb_wipe_all(struct tdb_context *tdb);
+int tdb_repack(struct tdb_context *tdb);
+
 /* Debug functions. Not used in production. */
 void tdb_dump_all(struct tdb_context *tdb);
 int tdb_printfreelist(struct tdb_context *tdb);
 int tdb_validate_freelist(struct tdb_context *tdb, int *pnum_entries);
-int tdb_wipe_all(struct tdb_context *tdb);
 int tdb_freelist_size(struct tdb_context *tdb);
+char *tdb_summary(struct tdb_context *tdb, enum tdb_summary_flags flags);
 
 extern TDB_DATA tdb_null;