X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fbucket.h;h=b6f584a8f63d7365c0ccb5e8cd7788b72bfc8226;hb=2cbdeacdc8f0fb3f4252c72a24407afba5788a6b;hp=815213ca8ea793e19205e8e45c997d2878503d60;hpb=89b67b2c54822c7867d8a91a896386f632d2051e;p=libucw.git

diff --git a/lib/bucket.h b/lib/bucket.h
index 815213ca..b6f584a8 100644
--- a/lib/bucket.h
+++ b/lib/bucket.h
@@ -1,7 +1,7 @@
 /*
  *	Sherlock Library -- Object Buckets
  *
- *	(c) 2001--2003 Martin Mares <mj@ucw.cz>
+ *	(c) 2001--2004 Martin Mares <mj@ucw.cz>
  *
  *	This software may be freely distributed and used according to the terms
  *	of the GNU Lesser General Public License.
@@ -17,7 +17,9 @@
  *
  * Locking: Each operation on the pool is protected by a flock.
  *
- * The buckets emulate non-seekable fastbuf streams.
+ * The buckets emulate fastbuf streams. Read streams act as normal files,
+ * but there can be only one write stream which is non-seekable and you
+ * also shouldn't open new read streams when writing.
  *
  * fork()'ing if you don't have any bucket open is safe.
  */
@@ -82,6 +84,13 @@ static inline sh_off_t obuck_get_pos(oid_t oid)
   return ((sh_off_t) oid) << OBUCK_SHIFT;
 }
 
+/* Calculate size of bucket which contains given amount of data */
+
+static inline uns obuck_bucket_size(uns len)
+{
+  return ALIGN(sizeof(struct obuck_header) + len + 4, OBUCK_ALIGN);
+}
+
 /* Shaking down bucket file */
 void obuck_shakedown(int (*kibitz)(struct obuck_header *old, oid_t new, byte *buck));