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15794a95 | 1 | /* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ |
7cc34889 | 2 | /* Compile this one with gcc. */ |
1504e3e1 | 3 | /* Copyright (C) 1997-2012 Free Software Foundation, Inc. |
7cc34889 MS |
4 | Contributed by Mike Stump <mrs@wrs.com>. |
5 | ||
1322177d | 6 | This file is part of GCC. |
7cc34889 | 7 | |
1322177d LB |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
748086b7 | 10 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 11 | version. |
7cc34889 | 12 | |
1322177d LB |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
7cc34889 | 17 | |
748086b7 JJ |
18 | Under Section 7 of GPL version 3, you are granted additional |
19 | permissions described in the GCC Runtime Library Exception, version | |
20 | 3.1, as published by the Free Software Foundation. | |
7cc34889 | 21 | |
748086b7 JJ |
22 | You should have received a copy of the GNU General Public License and |
23 | a copy of the GCC Runtime Library Exception along with this program; | |
24 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
25 | <http://www.gnu.org/licenses/>. */ | |
7cc34889 | 26 | |
88657302 RH |
27 | #ifndef GCC_GTHR_VXWORKS_H |
28 | #define GCC_GTHR_VXWORKS_H | |
7cc34889 | 29 | |
15794a95 L |
30 | #ifdef _LIBOBJC |
31 | ||
4977bab6 | 32 | /* libobjc requires the optional pthreads component. */ |
9fbcc75d | 33 | #include "gthr-posix.h" |
15794a95 | 34 | |
4977bab6 | 35 | #else |
37ca4602 NS |
36 | #ifdef __cplusplus |
37 | #define UNUSED(x) | |
38 | #else | |
39 | #define UNUSED(x) x __attribute__((unused)) | |
40 | #endif | |
7cc34889 | 41 | |
ac0d72f6 RS |
42 | #ifdef __cplusplus |
43 | extern "C" { | |
44 | #endif | |
45 | ||
7cc34889 | 46 | #define __GTHREADS 1 |
4977bab6 ZW |
47 | #define __gthread_active_p() 1 |
48 | ||
49 | /* Mutexes are easy, except that they need to be initialized at runtime. */ | |
7cc34889 | 50 | |
7cc34889 | 51 | #include <semLib.h> |
7cc34889 | 52 | |
7cc34889 | 53 | typedef SEM_ID __gthread_mutex_t; |
40aac948 JM |
54 | /* All VxWorks mutexes are recursive. */ |
55 | typedef SEM_ID __gthread_recursive_mutex_t; | |
4977bab6 | 56 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
40aac948 | 57 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
7cc34889 | 58 | |
4977bab6 ZW |
59 | static inline void |
60 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
7cc34889 | 61 | { |
4977bab6 | 62 | *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); |
7cc34889 MS |
63 | } |
64 | ||
4dabf736 JB |
65 | static inline int |
66 | __gthread_mutex_destroy (__gthread_mutex_t * UNUSED(mutex)) | |
67 | { | |
68 | return 0; | |
69 | } | |
70 | ||
7cc34889 MS |
71 | static inline int |
72 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
73 | { | |
7cc34889 MS |
74 | return semTake (*mutex, WAIT_FOREVER); |
75 | } | |
76 | ||
77 | static inline int | |
78 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
79 | { | |
7cc34889 MS |
80 | return semTake (*mutex, NO_WAIT); |
81 | } | |
82 | ||
83 | static inline int | |
84 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
85 | { | |
7cc34889 MS |
86 | return semGive (*mutex); |
87 | } | |
88 | ||
40aac948 JM |
89 | static inline void |
90 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) | |
91 | { | |
92 | __gthread_mutex_init_function (mutex); | |
93 | } | |
94 | ||
95 | static inline int | |
96 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) | |
97 | { | |
98 | return __gthread_mutex_lock (mutex); | |
99 | } | |
100 | ||
101 | static inline int | |
102 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) | |
103 | { | |
104 | return __gthread_mutex_trylock (mutex); | |
105 | } | |
106 | ||
107 | static inline int | |
108 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) | |
109 | { | |
110 | return __gthread_mutex_unlock (mutex); | |
111 | } | |
112 | ||
1504e3e1 JW |
113 | static inline int |
114 | __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) | |
115 | { | |
116 | return __gthread_mutex_destroy (__mutex); | |
117 | } | |
118 | ||
4977bab6 ZW |
119 | /* pthread_once is complicated enough that it's implemented |
120 | out-of-line. See config/vxlib.c. */ | |
121 | ||
122 | typedef struct | |
123 | { | |
24a40b35 NS |
124 | #if !defined(__RTP__) |
125 | #if defined(__PPC__) | |
126 | __attribute ((aligned (__alignof (unsigned)))) | |
127 | #endif | |
4977bab6 | 128 | volatile unsigned char busy; |
ac0d72f6 | 129 | #endif |
4977bab6 | 130 | volatile unsigned char done; |
24a40b35 NS |
131 | #if !defined(__RTP__) && defined(__PPC__) |
132 | /* PPC's test-and-set implementation requires a 4 byte aligned | |
133 | object, of which it only sets the first byte. We use padding | |
134 | here, in order to maintain some amount of backwards | |
135 | compatibility. Without this padding, gthread_once objects worked | |
136 | by accident because they happen to be static objects and the ppc | |
137 | port automatically increased their alignment to 4 bytes. */ | |
138 | unsigned char pad1; | |
139 | unsigned char pad2; | |
140 | #endif | |
4977bab6 ZW |
141 | } |
142 | __gthread_once_t; | |
143 | ||
24a40b35 | 144 | #if defined (__RTP__) |
ac0d72f6 | 145 | # define __GTHREAD_ONCE_INIT { 0 } |
b8698a0f | 146 | #elif defined (__PPC__) |
24a40b35 NS |
147 | # define __GTHREAD_ONCE_INIT { 0, 0, 0, 0 } |
148 | #else | |
149 | # define __GTHREAD_ONCE_INIT { 0, 0 } | |
ac0d72f6 | 150 | #endif |
4977bab6 | 151 | |
09e361bb | 152 | extern int __gthread_once (__gthread_once_t *__once, void (*__func)(void)); |
4977bab6 ZW |
153 | |
154 | /* Thread-specific data requires a great deal of effort, since VxWorks | |
155 | is not really set up for it. See config/vxlib.c for the gory | |
156 | details. All the TSD routines are sufficiently complex that they | |
157 | need to be implemented out of line. */ | |
158 | ||
159 | typedef unsigned int __gthread_key_t; | |
160 | ||
09e361bb JJ |
161 | extern int __gthread_key_create (__gthread_key_t *__keyp, void (*__dtor)(void *)); |
162 | extern int __gthread_key_delete (__gthread_key_t __key); | |
4977bab6 | 163 | |
09e361bb JJ |
164 | extern void *__gthread_getspecific (__gthread_key_t __key); |
165 | extern int __gthread_setspecific (__gthread_key_t __key, void *__ptr); | |
4977bab6 | 166 | |
37ca4602 NS |
167 | #undef UNUSED |
168 | ||
ac0d72f6 RS |
169 | #ifdef __cplusplus |
170 | } | |
171 | #endif | |
172 | ||
4977bab6 | 173 | #endif /* not _LIBOBJC */ |
15794a95 | 174 | |
4977bab6 | 175 | #endif /* gthr-vxworks.h */ |