diff options
| -rw-r--r-- | libtrivfs/file-lock.c | 39 |
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; +} + |