diff options
Diffstat (limited to 'libfshelp/rlock-status.c')
-rw-r--r-- | libfshelp/rlock-status.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libfshelp/rlock-status.c b/libfshelp/rlock-status.c new file mode 100644 index 00000000..718e540a --- /dev/null +++ b/libfshelp/rlock-status.c @@ -0,0 +1,53 @@ +/* Copyright (C) 2001, 2014-2019 Free Software Foundation, Inc. + + Written by Neal H Walfield <neal@cs.uml.edu> + + This file is part of the GNU Hurd. + + 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 the GNU Hurd. If not, see <http://www.gnu.org/licenses/>. */ + +#include "fshelp.h" +#include "rlock.h" +#include <fcntl.h> +#include <sys/file.h> + +int fshelp_rlock_peropen_status (struct rlock_peropen *po) +{ + struct rlock_list *l; + + if (! *po->locks) + return LOCK_UN; + + for (l = *po->locks; l; l = l->po.next) + if (l->type == F_WRLCK) + return LOCK_EX; + + return LOCK_SH; +} + +/* Like fshelp_rlock_peropen_status except for all users of NODE. */ +int fshelp_rlock_node_status (struct rlock_box *box) +{ + struct rlock_list *l; + + if (! box->locks) + return LOCK_UN; + + for (l = box->locks; l; l = l->node.next) + if (l->type == F_WRLCK) + return LOCK_EX; + + return LOCK_SH; +} + |