New function to limit use of fd's. Mark an ibex file in use, re-open if

2001-08-15  Not Zed  <NotZed@Ximian.com>

        * ibex_block.c (ibex_use): New function to limit use of fd's.
        Mark an ibex file in use, re-open if necessary, and close off
        another (lru) if necessary.
        (ibex_unuse): Mark an ibex as not in use.
        (ibex_open): Delay opening of the actual block file till later,
        and add the ibex to a global list.
        (ibex_save): Use/unuse around operations.
        (close_backend): Zero out blocks when closed.
        (ibex_close): Remove the ibex from the global list before closing
        it down.
        (ibex_index_buffer, ibex_find, ibex_unindex, ibex_find_name):
        Use/unuse around ops.

svn path=/trunk/; revision=12042

1 files changed, 7 insertions, 0 deletions

diff --git a/libibex/ibex_internal.h b/libibex/ibex_internal.h
index d8e5e28296..bb15ebc1f7 100644
--- a/libibex/ibex_internal.h
+++ b/libibex/ibex_internal.h
@@ -27,6 +27,11 @@
 #include "wordindex.h"
 
 struct ibex {
+	struct ibex *next;	/* for list of open ibex's */
+	struct ibex *prev;
+
+	int usecount;
+
 	char *name;
 	int flags;
 	int mode;
@@ -41,6 +46,8 @@ struct ibex {
 	
 };
 
+#define IBEX_OPEN_THRESHOLD (5)
+
 #ifdef ENABLE_THREADS
 /*#define IBEX_LOCK(ib) (printf(__FILE__ "%d: %s: locking ibex\n", __LINE__, __FUNCTION__), g_mutex_lock(ib->lock))
   #define IBEX_UNLOCK(ib) (printf(__FILE__ "%d: %s: unlocking ibex\n", __LINE__, __FUNCTION__), g_mutex_unlock(ib->lock))*/