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88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* Copyright (C) 1994-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <mach.h>
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#include <hurd/threadvar.h>
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#define GETPORT \
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mach_port_t *portloc = \
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(mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY)
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#define reply_port (*(use_threadvar ? portloc : &global_reply_port))
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static int use_threadvar;
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static mach_port_t global_reply_port;
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/* These functions are called by MiG-generated code. */
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/* Called by MiG to get a reply port. */
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mach_port_t
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__mig_get_reply_port (void)
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{
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GETPORT;
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if (reply_port == MACH_PORT_NULL)
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reply_port = __mach_reply_port ();
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return reply_port;
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}
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weak_alias (__mig_get_reply_port, mig_get_reply_port)
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/* Called by MiG to deallocate the reply port. */
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void
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__mig_dealloc_reply_port (mach_port_t arg)
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{
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mach_port_t port;
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GETPORT;
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port = reply_port;
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reply_port = MACH_PORT_NULL; /* So the mod_refs RPC won't use it. */
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if (MACH_PORT_VALID (port))
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__mach_port_mod_refs (__mach_task_self (), port,
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MACH_PORT_RIGHT_RECEIVE, -1);
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}
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weak_alias (__mig_dealloc_reply_port, mig_dealloc_reply_port)
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/* Called by mig interfaces when done with a port. Used to provide the
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same interface as needed when a custom allocator is used. */
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void
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__mig_put_reply_port(mach_port_t port)
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{
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/* Do nothing. */
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}
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weak_alias (__mig_put_reply_port, mig_put_reply_port)
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/* Called at startup with STACK == NULL. When per-thread variables are set
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up, this is called again with STACK set to the new stack being switched
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to, where per-thread variables should be set up. */
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void
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__mig_init (void *stack)
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{
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use_threadvar = stack != 0;
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if (use_threadvar)
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{
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/* Recycle the reply port used before multithreading was enabled. */
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mach_port_t *portloc = (mach_port_t *)
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__hurd_threadvar_location_from_sp (_HURD_THREADVAR_MIG_REPLY, stack);
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*portloc = global_reply_port;
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global_reply_port = MACH_PORT_NULL;
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}
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}
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weak_alias (__mig_init, mig_init)
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