New variable $exim_version. Bug 306

[exim.git] / src / src / dbstuff.h

diff --git a/src/src/dbstuff.h b/src/src/dbstuff.h
index 2cbd8ca636324f14f437c5eaaba6115627ef630a..ce81f1eb4f84598dcd8e517aa0b8960e11c9204d 100644 (file)
--- a/src/src/dbstuff.h
+++ b/src/src/dbstuff.h
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/src/src/dbstuff.h,v 1.7 2007/08/29 14:02:22 ph10 Exp $ */
-
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2007 */
+/* Copyright (c) University of Cambridge 1995 - 2009 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* This header file contains macro definitions so that a variety of DBM
@@ -300,6 +298,17 @@ before use, but we don't have to free anything after reading data. */
 /* Some text for messages */
 #define EXIM_DBTYPE   "db (v1)"
 
+/* When scanning, for the non-first case we historically just passed 0
+as the flags field and it worked.  On FreeBSD 8 it no longer works and
+instead leads to memory exhaustion.  The man-page on FreeBSD says to use
+R_NEXT, but this 1.x is a historical fallback and I've no idea how portable
+the use of that flag is; so the solution is to define R_NEXT here if it's not
+already defined, with a default value of 0 because that's what we've always
+before been able to pass successfully. */
+#ifndef R_NEXT
+#define R_NEXT 0
+#endif
+
 /* Access functions */
 
 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
@@ -331,7 +340,7 @@ before use, but we don't have to free anything after reading data. */
 
 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
 #define EXIM_DBSCAN(db, key, data, first, cursor)      \
-       ((db)->seq(db, &key, &data, (first? R_FIRST : 0)) == 0)
+       ((db)->seq(db, &key, &data, (first? R_FIRST : R_NEXT)) == 0)
 
 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). Make it
 refer to cursor, to keep picky compilers happy. */
@@ -643,5 +652,14 @@ typedef struct {
   double rate;            /* Smoothed sending rate at that time */
 } dbdata_ratelimit;
 
+/* Same as above, plus a Bloom filter for uniquifying events. */
+
+typedef struct {
+  dbdata_ratelimit dbd;
+  time_t   bloom_epoch;   /* When the Bloom filter was last reset */
+  unsigned bloom_size;    /* Number of bytes in the Bloom filter */
+  uschar   bloom[40];     /* Bloom filter which may be larger than this */
+} dbdata_ratelimit_unique;
+
 
 /* End of dbstuff.h */