Initial revision

1 files changed, 39 insertions, 0 deletions

diff --git a/libtrivfs/file-lock.c b/libtrivfs/file-lock.c
new file mode 100644
index 00000000..70e65c7e
--- /dev/null
+++ b/libtrivfs/file-lock.c
@@ -0,0 +1,39 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+static struct mutex lock = MUTEX_INITIALIZER;
+static struct lock_box lockbox;
+static int inited = 0;
+
+error_t
+trivfs_S_file_lock (struct protid *cred, int flags)
+{
+  error_t err;
+
+  mutex_lock (&lock);
+  if (!inited)
+    {
+      fshelp_lock_init (&lockbox);
+      inited = 1;
+    }
+  err = fshelp_acquire_lock (&lockbox, &cred->po->lock_status, &lock, flags);
+  mutex_unlock (&lock);
+  return err;
+}
+