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d4697bc9 | 1 | /* Copyright (C) 1994-2014 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
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5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
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8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
478b92f0 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <mach.h> | |
19 | #include <hurd/threadvar.h> | |
20 | ||
21 | #define GETPORT \ | |
22 | mach_port_t *portloc = \ | |
23 | (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY) | |
bf3534a5 | 24 | #define reply_port (*(use_threadvar ? portloc : &global_reply_port)) |
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25 | |
26 | static int use_threadvar; | |
27 | static mach_port_t global_reply_port; | |
28 | ||
29 | /* These functions are called by MiG-generated code. */ | |
30 | ||
31 | /* Called by MiG to get a reply port. */ | |
32 | mach_port_t | |
33 | __mig_get_reply_port (void) | |
34 | { | |
35 | GETPORT; | |
36 | ||
37 | if (reply_port == MACH_PORT_NULL) | |
38 | reply_port = __mach_reply_port (); | |
39 | ||
40 | return reply_port; | |
41 | } | |
42 | weak_alias (__mig_get_reply_port, mig_get_reply_port) | |
43 | ||
44 | /* Called by MiG to deallocate the reply port. */ | |
45 | void | |
46 | __mig_dealloc_reply_port (mach_port_t arg) | |
47 | { | |
48 | mach_port_t port; | |
49 | ||
50 | GETPORT; | |
51 | ||
52 | port = reply_port; | |
53 | reply_port = MACH_PORT_NULL; /* So the mod_refs RPC won't use it. */ | |
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54 | |
55 | if (MACH_PORT_VALID (port)) | |
56 | __mach_port_mod_refs (__mach_task_self (), port, | |
57 | MACH_PORT_RIGHT_RECEIVE, -1); | |
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58 | } |
59 | weak_alias (__mig_dealloc_reply_port, mig_dealloc_reply_port) | |
60 | ||
61 | /* Called by mig interfaces when done with a port. Used to provide the | |
62 | same interface as needed when a custom allocator is used. */ | |
63 | void | |
64 | __mig_put_reply_port(mach_port_t port) | |
65 | { | |
66 | /* Do nothing. */ | |
67 | } | |
68 | weak_alias (__mig_put_reply_port, mig_put_reply_port) | |
69 | ||
70 | /* Called at startup with STACK == NULL. When per-thread variables are set | |
71 | up, this is called again with STACK set to the new stack being switched | |
72 | to, where per-thread variables should be set up. */ | |
73 | void | |
74 | __mig_init (void *stack) | |
75 | { | |
76 | use_threadvar = stack != 0; | |
77 | ||
78 | if (use_threadvar) | |
79 | { | |
80 | /* Recycle the reply port used before multithreading was enabled. */ | |
81 | mach_port_t *portloc = (mach_port_t *) | |
82 | __hurd_threadvar_location_from_sp (_HURD_THREADVAR_MIG_REPLY, stack); | |
83 | *portloc = global_reply_port; | |
84 | global_reply_port = MACH_PORT_NULL; | |
85 | } | |
86 | } | |
87 | weak_alias (__mig_init, mig_init) |