diff options
Diffstat (limited to 'libports/claim-right.c')
| -rw-r--r-- | libports/claim-right.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libports/claim-right.c b/libports/claim-right.c new file mode 100644 index 00000000..2ddb3aaa --- /dev/null +++ b/libports/claim-right.c @@ -0,0 +1,52 @@ +/* Take a receive right away from a port + Copyright (C) 1996 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG. + + 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + + +#include "ports.h" +#include <hurd/ihash.h> + +mach_port_t +ports_claim_right (void *portstruct) +{ + struct port_info *pi = portstruct; + mach_port_t ret; + + if (pi->port_right != MACH_PORT_NULL) + { + ret = pi->port_right; + + mutex_lock (&_ports_lock); + ihash_locp_remove (pi->bucket->htable, pi->hentry); + mach_port_move_member (mach_task_self (), ret, MACH_PORT_NULL); + pi->port_right = MACH_PORT_NULL; + if (pi->flags & PORT_HAS_SENDRIGHTS) + { + pi->flags &= ~PORT_HAS_SENDRIGHTS; + mutex_unlock (&_ports_lock); + ports_port_deref (pi); + } + else + mutex_unlock (&_ports_lock); + } + else + ret = MACH_PORT_NULL; + return ret; +} + |