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1 | /* Threads compatibily routines for libgcc2. */ |
2 | /* Compile this one with gcc. */ | |
3 | /* Copyright (C) 1997 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* As a special exception, if you link this library with other files, | |
23 | some of which are compiled with GCC, to produce an executable, | |
24 | this library does not by itself cause the resulting executable | |
25 | to be covered by the GNU General Public License. | |
26 | This exception does not however invalidate any other reasons why | |
27 | the executable file might be covered by the GNU General Public License. */ | |
28 | ||
29 | #ifndef __gthr_solaris_h | |
30 | #define __gthr_solaris_h | |
31 | ||
32 | /* Solaris threads as found in Solaris 2.[456]. | |
33 | Actually these are Unix International (UI) threads, but I don't | |
34 | know if anyone else implements these. */ | |
35 | ||
36 | #define __GTHREADS 1 | |
37 | ||
38 | #include <thread.h> | |
39 | #include <errno.h> | |
40 | ||
41 | typedef thread_key_t __gthread_key_t; | |
42 | typedef struct | |
43 | { | |
44 | mutex_t mutex; | |
45 | int once; | |
46 | } __gthread_once_t; | |
47 | typedef mutex_t __gthread_mutex_t; | |
48 | ||
49 | #define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 } | |
50 | #define __GTHREAD_MUTEX_INIT DEFAULTMUTEX | |
51 | ||
52 | #if SUPPORTS_WEAK && GTHREAD_USE_WEAK | |
53 | ||
54 | #pragma weak thr_keycreate | |
55 | #pragma weak thr_getspecific | |
56 | #pragma weak thr_setspecific | |
57 | #pragma weak thr_create | |
58 | ||
59 | #pragma weak mutex_lock | |
60 | #pragma weak mutex_trylock | |
61 | #pragma weak mutex_unlock | |
62 | ||
63 | /* This will not actually work in Solaris 2.5, since libc contains | |
64 | dummy symbols of all thr_* routines. */ | |
65 | ||
66 | static void *__gthread_active_ptr = &thr_create; | |
67 | ||
68 | static inline int | |
69 | __gthread_active_p () | |
70 | { | |
71 | return __gthread_active_ptr != 0; | |
72 | } | |
73 | ||
74 | #else /* not SUPPORTS_WEAK */ | |
75 | ||
76 | static inline int | |
77 | __gthread_active_p () | |
78 | { | |
79 | return 1; | |
80 | } | |
81 | ||
82 | #endif /* SUPPORTS_WEAK */ | |
83 | ||
84 | static inline int | |
85 | __gthread_once (__gthread_once_t *once, void (*func) ()) | |
86 | { | |
87 | if (! __gthread_active_p ()) | |
88 | return -1; | |
89 | ||
90 | if (once == 0 || func == 0) | |
91 | { | |
92 | errno = EINVAL; | |
93 | return -1; | |
94 | } | |
95 | ||
96 | if (once->once == 0) | |
97 | { | |
98 | if (mutex_lock (&once->mutex) != 0) | |
99 | return -1; | |
100 | if (once->once == 0) | |
101 | { | |
102 | (*func) (); | |
103 | once->once ++; | |
104 | } | |
105 | mutex_unlock (&once->mutex); | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static inline int | |
111 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) | |
112 | { | |
113 | /* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually | |
114 | got a reasonable key value, and if not, fail. */ | |
115 | *key = -1; | |
116 | if (thr_keycreate (key, dtor) == -1 || *key == -1) | |
117 | return -1; | |
118 | else | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline int | |
123 | __gthread_key_dtor (__gthread_key_t key, void *ptr) | |
124 | { | |
125 | /* Nothing needed. */ | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline int | |
130 | __gthread_key_delete (__gthread_key_t key) | |
131 | { | |
132 | /* Not possible. */ | |
133 | return -1; | |
134 | } | |
135 | ||
136 | static inline void * | |
137 | __gthread_getspecific (__gthread_key_t key) | |
138 | { | |
139 | void *ptr; | |
140 | if (thr_getspecific (key, &ptr) == 0) | |
141 | return ptr; | |
142 | else | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static inline int | |
147 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
148 | { | |
149 | return thr_setspecific (key, (void *) ptr); | |
150 | } | |
151 | ||
152 | static inline int | |
153 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
154 | { | |
155 | if (__gthread_active_p ()) | |
156 | return mutex_lock (mutex); | |
157 | else | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static inline int | |
162 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
163 | { | |
164 | if (__gthread_active_p ()) | |
165 | return mutex_trylock (mutex); | |
166 | else | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static inline int | |
171 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
172 | { | |
173 | if (__gthread_active_p ()) | |
174 | return mutex_unlock (mutex); | |
175 | else | |
176 | return 0; | |
177 | } | |
178 | ||
179 | #endif /* not __gthr_solaris_h */ |