From 82781dd6da2b6a1eb113e20d100052509bb85a90 Mon Sep 17 00:00:00 2001
From: Marcus Brinkmann <marcus@gnu.org>
Date: Thu, 19 Apr 2001 22:11:52 +0000
Subject: 2001-02-18 Marcus Brinkmann <marcus@gnu.org>
* dev.h (struct dev): New member nperopens.
* storeio.c (open_hook): Hold device lock and check if this is the
first open. If yes, activate the store.
(close_hook): Hold global_lock and check if this was the last
open. If yes, inactivate the store.
* dev.c (dev_open): Open the store with STORE_INACTIVE
(in store_parsed_open as well as in store_create).
---
storeio/dev.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
(limited to 'storeio/dev.h')
diff --git a/storeio/dev.h b/storeio/dev.h
index 7a64c54e..d5b9d1a4 100644
--- a/storeio/dev.h
+++ b/storeio/dev.h
@@ -50,8 +50,12 @@ struct dev
indicates that there is no owner. */
pid_t owner;
- /* This lock protects `store' and `owner'. The other members never
- change after creation, except for those locked by io_lock (below). */
+ /* The number of active opens. */
+ int nperopens;
+
+ /* This lock protects `store', `owner' and `nperopens'. The other
+ members never change after creation, except for those locked by
+ io_lock (below). */
struct mutex lock;
/* Nonzero iff the --no-cache flag was given.
--
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