diff options
Diffstat (limited to 'nscd')
| -rw-r--r-- | nscd/cache.c | 11 | ||||
| -rw-r--r-- | nscd/nscd.h | 1 |
2 files changed, 11 insertions, 1 deletions
diff --git a/nscd/cache.c b/nscd/cache.c index 787f8b46f5..899e2caf77 100644 --- a/nscd/cache.c +++ b/nscd/cache.c @@ -1,4 +1,4 @@ -/* Copyright (c) 1998, 1999, 2003, 2004, 2005 Free Software Foundation, Inc. +/* Copyright (c) 1998, 1999, 2003-2005, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -198,6 +198,13 @@ prune_cache (struct database_dyn *table, time_t now) if (cnt == 0) return; + /* This function can be called from the cleanup thread but also in + response to an invalidate command. Make sure only one thread is + running. No need for the second to wait around. */ + if (pthread_mutex_trylock (&table->prunelock) != 0) + /* Te work is already being done. */ + return ; + /* If we check for the modification of the underlying file we invalidate the entries also in this case. */ if (table->check_file) @@ -455,4 +462,6 @@ prune_cache (struct database_dyn *table, time_t now) /* Run garbage collection if any entry has been removed or replaced. */ if (any) gc (table); + + pthread_mutex_unlock (&table->prunelock); } diff --git a/nscd/nscd.h b/nscd/nscd.h index 8b95630807..4a9547221a 100644 --- a/nscd/nscd.h +++ b/nscd/nscd.h @@ -58,6 +58,7 @@ typedef enum struct database_dyn { pthread_rwlock_t lock; + pthread_mutex_t prunelock; int enabled; int check_file; |