SEEN-Database: refactor database interface for remembering whether we already aggrega...

[citadel.git] / citadel / database.h

diff --git a/citadel/database.h b/citadel/database.h
index 399f2013a308a84bf00a84535d09c4eac1c40f97..88129b49d423e4d09ac725fb4b5d5c87f17877f8 100644 (file)
--- a/citadel/database.h
+++ b/citadel/database.h
@@ -1,12 +1,71 @@
-/* $Id$ */
-void defrag_databases (void);
+/*
+ * Copyright (c) 1987-2012 by the citadel.org team
+ *
+ *  This program is open source software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#ifndef DATABASE_H
+#define DATABASE_H
+
+
 void open_databases (void);
 void close_databases (void);
-int cdb_store (int cdb, void *key, int keylen, void *data, int datalen);
+int cdb_store (int cdb, const void *key, int keylen, void *data, int datalen);
 int cdb_delete (int cdb, void *key, int keylen);
-struct cdbdata *cdb_fetch (int cdb, void *key, int keylen);
+struct cdbdata *cdb_fetch (int cdb, const void *key, int keylen);
 void cdb_free (struct cdbdata *cdb);
 void cdb_rewind (int cdb);
 struct cdbdata *cdb_next_item (int cdb);
+void cdb_close_cursor(int cdb);
 void cdb_begin_transaction(void);
 void cdb_end_transaction(void);
+void cdb_allocate_tsd(void);
+void cdb_free_tsd(void);
+void cdb_check_handles(void);
+void cdb_trunc(int cdb);
+void *checkpoint_thread(void *arg);
+void cdb_chmod_data(void);
+void cdb_checkpoint(void);
+void check_handles(void *arg);
+
+/*
+ * Database records beginning with this magic number are assumed to
+ * be compressed.  In the event that a database record actually begins with
+ * this magic number, we *must* compress it whether we want to or not,
+ * because the fetch function will try to uncompress it anyway.
+ * 
+ * (No need to #ifdef this stuff; it compiles ok even if zlib is not present
+ * and doesn't declare anything so it won't bloat the code)
+ */
+#define COMPRESS_MAGIC 0xc0ffeeee
+
+struct CtdlCompressHeader {
+       int magic;
+       size_t uncompressed_len;
+       size_t compressed_len;
+};
+
+typedef enum __eCheckType {
+       eCheckExist,
+       eCheckUpdate,
+       eUpdate,
+       eWrite
+}eCheckType;
+
+time_t CheckIfAlreadySeen(const char *Facility,
+                         StrBuf *guid,
+                         time_t now,
+                         time_t antiexpire,
+                         eCheckType cType,
+                         long ccid,
+                         long ioid);
+
+
+#endif /* DATABASE_H */
+