home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (C) 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <mach.h>
- #include <hurd/threadvar.h>
-
- #define GETPORT \
- mach_port_t *portloc = \
- (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY)
- #define reply_port (use_threadvar ? *portloc : global_reply_port)
-
- static int use_threadvar;
- static mach_port_t global_reply_port;
-
- /* These functions are called by MiG-generated code. */
-
- /* Called by MiG to get a reply port. */
- mach_port_t
- __mig_get_reply_port (void)
- {
- GETPORT;
-
- if (reply_port == MACH_PORT_NULL)
- reply_port = __mach_reply_port ();
-
- return reply_port;
- }
-
- /* Called by MiG to deallocate the reply port. */
- void
- __mig_dealloc_reply_port (mach_port_t arg)
- {
- mach_port_t port;
-
- GETPORT;
-
- port = reply_port;
- reply_port = MACH_PORT_NULL; /* So the mod_refs RPC won't use it. */
- __mach_port_mod_refs (__mach_task_self (), port,
- MACH_PORT_RIGHT_RECEIVE, -1);
- }
-
- /* Called by mig interfaces when done with a port. Used to provide the
- same interface as needed when a custom allocator is used. */
- void
- __mig_put_reply_port(mach_port_t port)
- {
- /* Do nothing. */
- }
-
-
- /* Called at startup with STACK == NULL. When per-thread variables are set
- up, this is called again with STACK set to the new stack being switched
- to, where per-thread variables should be set up. */
- void
- __mig_init (void *stack)
- {
- use_threadvar = stack != 0;
-
- if (use_threadvar)
- {
- /* Recycle the reply port used before multithreading was enabled. */
- mach_port_t *portloc = (mach_port_t *)
- __hurd_threadvar_location_from_sp (_HURD_THREADVAR_MIG_REPLY, stack);
- *portloc = global_reply_port;
- global_reply_port = MACH_PORT_NULL;
- }
- }
-