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899905f6 | 1 | /* Threads compatibility routines for libgcc2. */ |
f24af81b TT |
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_posix_h | |
30 | #define __gthr_posix_h | |
31 | ||
32 | /* POSIX threads specific definitions. | |
33 | Easy, since the interface is just one-to-one mapping. */ | |
34 | ||
35 | #define __GTHREADS 1 | |
36 | ||
37 | #include <pthread.h> | |
38 | ||
39 | typedef pthread_key_t __gthread_key_t; | |
40 | typedef pthread_once_t __gthread_once_t; | |
41 | typedef pthread_mutex_t __gthread_mutex_t; | |
42 | ||
43 | #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER | |
44 | #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT | |
45 | ||
46 | #if SUPPORTS_WEAK && GTHREAD_USE_WEAK | |
47 | ||
48 | #pragma weak pthread_once | |
49 | #pragma weak pthread_key_create | |
50 | #pragma weak pthread_key_delete | |
51 | #pragma weak pthread_getspecific | |
52 | #pragma weak pthread_setspecific | |
53 | #pragma weak pthread_create | |
54 | ||
55 | #pragma weak pthread_mutex_lock | |
56 | #pragma weak pthread_mutex_trylock | |
57 | #pragma weak pthread_mutex_unlock | |
58 | ||
59 | static void *__gthread_active_ptr = &pthread_create; | |
60 | ||
61 | static inline int | |
d1e51320 | 62 | __gthread_active_p (void) |
f24af81b TT |
63 | { |
64 | return __gthread_active_ptr != 0; | |
65 | } | |
66 | ||
67 | #else /* not SUPPORTS_WEAK */ | |
68 | ||
69 | static inline int | |
d1e51320 | 70 | __gthread_active_p (void) |
f24af81b TT |
71 | { |
72 | return 1; | |
73 | } | |
74 | ||
75 | #endif /* SUPPORTS_WEAK */ | |
76 | ||
77 | static inline int | |
d1e51320 | 78 | __gthread_once (__gthread_once_t *once, void (*func) (void)) |
f24af81b TT |
79 | { |
80 | if (__gthread_active_p ()) | |
81 | return pthread_once (once, func); | |
82 | else | |
83 | return -1; | |
84 | } | |
85 | ||
86 | static inline int | |
87 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) | |
88 | { | |
89 | return pthread_key_create (key, dtor); | |
90 | } | |
91 | ||
92 | static inline int | |
93 | __gthread_key_dtor (__gthread_key_t key, void *ptr) | |
94 | { | |
95 | /* Just reset the key value to zero. */ | |
96 | if (ptr) | |
97 | return pthread_setspecific (key, 0); | |
98 | else | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static inline int | |
103 | __gthread_key_delete (__gthread_key_t key) | |
104 | { | |
105 | return pthread_key_delete (key); | |
106 | } | |
107 | ||
108 | static inline void * | |
109 | __gthread_getspecific (__gthread_key_t key) | |
110 | { | |
111 | return pthread_getspecific (key); | |
112 | } | |
113 | ||
114 | static inline int | |
115 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
116 | { | |
117 | return pthread_setspecific (key, ptr); | |
118 | } | |
119 | ||
120 | static inline int | |
121 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
122 | { | |
123 | if (__gthread_active_p ()) | |
124 | return pthread_mutex_lock (mutex); | |
125 | else | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline int | |
130 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
131 | { | |
132 | if (__gthread_active_p ()) | |
133 | return pthread_mutex_trylock (mutex); | |
134 | else | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static inline int | |
139 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
140 | { | |
141 | if (__gthread_active_p ()) | |
142 | return pthread_mutex_unlock (mutex); | |
143 | else | |
144 | return 0; | |
145 | } | |
146 | ||
147 | #endif /* not __gthr_posix_h */ |