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This commit is contained in:
Roland McGrath
1995-02-18 01:27:10 +00:00
commit 28f540f45b
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sysdeps/mach/hurd/mig-reply.c Normal file
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/* Copyright (C) 1994, 1995 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;
}
weak_alias (__mig_get_reply_port, mig_get_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);
}
weak_alias (__mig_dealloc_reply_port, mig_dealloc_reply_port)
/* 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. */
}
weak_alias (__mig_put_reply_port, mig_put_reply_port)
/* 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;
}
}
weak_alias (__mig_init, mig_init)