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15794a95 | 1 | /* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ |
7cc34889 | 2 | /* Compile this one with gcc. */ |
15794a95 | 3 | /* Copyright (C) 1997, 1999, 2000 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 | |
10 | Software Foundation; either version 2, or (at your option) any later | |
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 MS |
17 | |
18 | You should have received a copy of the GNU General Public License | |
1322177d LB |
19 | along with GCC; see the file COPYING. If not, write to the Free |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
7cc34889 MS |
22 | |
23 | /* As a special exception, if you link this library with other files, | |
24 | some of which are compiled with GCC, to produce an executable, | |
25 | this library does not by itself cause the resulting executable | |
26 | to be covered by the GNU General Public License. | |
27 | This exception does not however invalidate any other reasons why | |
28 | the executable file might be covered by the GNU General Public License. */ | |
29 | ||
88657302 RH |
30 | #ifndef GCC_GTHR_VXWORKS_H |
31 | #define GCC_GTHR_VXWORKS_H | |
7cc34889 | 32 | |
15794a95 L |
33 | #ifdef _LIBOBJC |
34 | ||
4977bab6 ZW |
35 | /* libobjc requires the optional pthreads component. */ |
36 | #include "gthr-posix.h" | |
15794a95 | 37 | |
4977bab6 | 38 | #else |
7cc34889 MS |
39 | |
40 | #define __GTHREADS 1 | |
4977bab6 ZW |
41 | #define __gthread_active_p() 1 |
42 | ||
43 | /* Mutexes are easy, except that they need to be initialized at runtime. */ | |
7cc34889 | 44 | |
7cc34889 | 45 | #include <semLib.h> |
7cc34889 | 46 | |
7cc34889 | 47 | typedef SEM_ID __gthread_mutex_t; |
40aac948 JM |
48 | /* All VxWorks mutexes are recursive. */ |
49 | typedef SEM_ID __gthread_recursive_mutex_t; | |
4977bab6 | 50 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
40aac948 | 51 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
7cc34889 | 52 | |
4977bab6 ZW |
53 | static inline void |
54 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
7cc34889 | 55 | { |
4977bab6 | 56 | *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); |
7cc34889 MS |
57 | } |
58 | ||
7cc34889 MS |
59 | static inline int |
60 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
61 | { | |
7cc34889 MS |
62 | return semTake (*mutex, WAIT_FOREVER); |
63 | } | |
64 | ||
65 | static inline int | |
66 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
67 | { | |
7cc34889 MS |
68 | return semTake (*mutex, NO_WAIT); |
69 | } | |
70 | ||
71 | static inline int | |
72 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
73 | { | |
7cc34889 MS |
74 | return semGive (*mutex); |
75 | } | |
76 | ||
40aac948 JM |
77 | static inline void |
78 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) | |
79 | { | |
80 | __gthread_mutex_init_function (mutex); | |
81 | } | |
82 | ||
83 | static inline int | |
84 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) | |
85 | { | |
86 | return __gthread_mutex_lock (mutex); | |
87 | } | |
88 | ||
89 | static inline int | |
90 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) | |
91 | { | |
92 | return __gthread_mutex_trylock (mutex); | |
93 | } | |
94 | ||
95 | static inline int | |
96 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) | |
97 | { | |
98 | return __gthread_mutex_unlock (mutex); | |
99 | } | |
100 | ||
4977bab6 ZW |
101 | /* pthread_once is complicated enough that it's implemented |
102 | out-of-line. See config/vxlib.c. */ | |
103 | ||
104 | typedef struct | |
105 | { | |
106 | volatile unsigned char busy; | |
107 | volatile unsigned char done; | |
108 | } | |
109 | __gthread_once_t; | |
110 | ||
111 | #define __GTHREAD_ONCE_INIT { 0, 0 } | |
112 | ||
113 | extern int __gthread_once (__gthread_once_t *once, void (*func)(void)); | |
114 | ||
115 | /* Thread-specific data requires a great deal of effort, since VxWorks | |
116 | is not really set up for it. See config/vxlib.c for the gory | |
117 | details. All the TSD routines are sufficiently complex that they | |
118 | need to be implemented out of line. */ | |
119 | ||
120 | typedef unsigned int __gthread_key_t; | |
121 | ||
122 | extern int __gthread_key_create (__gthread_key_t *keyp, void (*dtor)(void *)); | |
123 | extern int __gthread_key_delete (__gthread_key_t key); | |
124 | ||
125 | extern void *__gthread_getspecific (__gthread_key_t key); | |
126 | extern int __gthread_setspecific (__gthread_key_t key, void *ptr); | |
127 | ||
128 | #endif /* not _LIBOBJC */ | |
15794a95 | 129 | |
4977bab6 | 130 | #endif /* gthr-vxworks.h */ |