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1 | /* classes: h_files */ |
2 | ||
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3 | #ifndef SCM_NULL_THREADS_H |
4 | #define SCM_NULL_THREADS_H | |
3d527b27 | 5 | |
2bf0e122 | 6 | /* Copyright (C) 2005, 2006, 2010 Free Software Foundation, Inc. |
3d527b27 | 7 | * |
73be1d9e | 8 | * This library is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Lesser General Public License |
10 | * as published by the Free Software Foundation; either version 3 of | |
11 | * the License, or (at your option) any later version. | |
3d527b27 | 12 | * |
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13 | * This library is distributed in the hope that it will be useful, but |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
3d527b27 | 17 | * |
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18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with this library; if not, write to the Free Software | |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
21 | * 02110-1301 USA | |
73be1d9e | 22 | */ |
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23 | |
24 | \f | |
25 | ||
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26 | /* The null-threads implementation. We provide the subset of the |
27 | standard pthread API that is used by Guile, but no new threads can | |
28 | be created. | |
9bc4701c | 29 | |
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30 | This file merely exits so that Guile can be compiled and run |
31 | without using pthreads. Improving performance via optimizations | |
32 | that are possible in a single-threaded program is not a primary | |
33 | goal. | |
d0350293 | 34 | */ |
3d527b27 | 35 | |
93003b16 | 36 | #include <stdlib.h> |
9de87eea | 37 | #include <errno.h> |
d0350293 | 38 | |
93003b16 | 39 | /* Threads |
d0350293 | 40 | */ |
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41 | #define scm_i_pthread_t int |
42 | #define scm_i_pthread_self() 0 | |
43 | #define scm_i_pthread_create(t,a,f,d) (*(t)=0, (void)(f), ENOSYS) | |
44 | #define scm_i_pthread_detach(t) do { } while (0) | |
93003b16 | 45 | #define scm_i_pthread_exit(v) exit (EXIT_SUCCESS) |
2e77f720 LC |
46 | #define scm_i_pthread_cancel(t) 0 |
47 | #define scm_i_pthread_cleanup_push(t,v) 0 | |
48 | #define scm_i_pthread_cleanup_pop(e) 0 | |
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49 | #define scm_i_sched_yield() 0 |
50 | ||
51 | /* Signals | |
52 | */ | |
53 | #define scm_i_pthread_sigmask sigprocmask | |
d0350293 | 54 | |
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55 | /* Mutexes |
56 | */ | |
57 | #define SCM_I_PTHREAD_MUTEX_INITIALIZER 0 | |
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58 | #define scm_i_pthread_mutex_t int |
59 | #define scm_i_pthread_mutex_init(m,a) (*(m) = 0) | |
60 | #define scm_i_pthread_mutex_destroy(m) do { (void)(m); } while(0) | |
61 | #define scm_i_pthread_mutex_trylock(m) ((*(m))++) | |
62 | #define scm_i_pthread_mutex_lock(m) ((*(m))++) | |
63 | #define scm_i_pthread_mutex_unlock(m) ((*(m))--) | |
d1138028 | 64 | #define scm_i_pthread_mutexattr_recursive 0 |
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65 | |
66 | /* Condition variables | |
67 | */ | |
68 | #define SCM_I_PTHREAD_COND_INITIALIZER 0 | |
69 | #define scm_i_pthread_cond_t int | |
70 | #define scm_i_pthread_cond_init(c,a) (*(c) = 0) | |
71 | #define scm_i_pthread_cond_destroy(c) do { (void)(c); } while(0) | |
72 | #define scm_i_pthread_cond_signal(c) (*(c) = 1) | |
73 | #define scm_i_pthread_cond_broadcast(c) (*(c) = 1) | |
74 | #define scm_i_pthread_cond_wait(c,m) (abort(), 0) | |
75 | #define scm_i_pthread_cond_timedwait(c,m,t) (abort(), 0) | |
76 | ||
77 | /* Onces | |
78 | */ | |
79 | #define scm_i_pthread_once_t int | |
80 | #define SCM_I_PTHREAD_ONCE_INIT 0 | |
81 | #define scm_i_pthread_once(o,f) do { \ | |
82 | if(!*(o)) { *(o)=1; f (); } \ | |
83 | } while(0) | |
d0350293 | 84 | |
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85 | /* Thread specific storage |
86 | */ | |
87 | typedef struct scm_i_pthread_key_t { | |
88 | struct scm_i_pthread_key_t *next; | |
89 | void *value; | |
90 | void (*destr_func) (void *); | |
91 | } scm_i_pthread_key_t; | |
92 | ||
93 | SCM_API int scm_i_pthread_key_create (scm_i_pthread_key_t *key, | |
94 | void (*destr_func) (void *)); | |
95 | #define scm_i_pthread_setspecific(k,p) ((k).value = (p)) | |
96 | #define scm_i_pthread_getspecific(k) ((k).value) | |
97 | ||
98 | /* Convenience functions | |
99 | */ | |
100 | #define scm_i_scm_pthread_mutex_lock scm_i_pthread_mutex_lock | |
661ae7ab | 101 | #define scm_i_dynwind_pthread_mutex_lock scm_i_pthread_mutex_lock |
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102 | #define scm_i_scm_pthread_cond_wait scm_i_pthread_cond_wait |
103 | #define scm_i_scm_pthread_cond_timedwait scm_i_pthread_cond_timedwait | |
3d527b27 | 104 | |
3d527b27 | 105 | |
d0350293 | 106 | #endif /* SCM_NULL_THREADS_H */ |
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107 | |
108 | /* | |
109 | Local Variables: | |
110 | c-file-style: "gnu" | |
111 | End: | |
112 | */ |