diff options
Diffstat (limited to 'libports/port-deref-weak.c')
-rw-r--r-- | libports/port-deref-weak.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libports/port-deref-weak.c b/libports/port-deref-weak.c new file mode 100644 index 00000000..2bef3338 --- /dev/null +++ b/libports/port-deref-weak.c @@ -0,0 +1,38 @@ +/* + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Michael I. Bushnell. + + This file is part of the GNU Hurd. + + The GNU Hurd 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. + + The GNU Hurd 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 "ports.h" +#include <cthreads.h> +#include <assert.h> + +void +ports_port_deref_weak (void *portstruct) +{ + struct port_info *pi = portstruct; + + mutex_lock (&_ports_lock); + assert (pi->weakrefcnt); + pi->weakrefcnt--; + if (pi->refcnt == 0 && pi->weakrefcnt == 0) + _ports_complete_deallocate (pi); + else + mutex_unlock (&_ports_lock); +} + |