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1 | /* classes: h_files */ |
2 | ||
d0350293 MV |
3 | #ifndef SCM_NULL_THREADS_H |
4 | #define SCM_NULL_THREADS_H | |
3d527b27 | 5 | |
2b829bbb | 6 | /* Copyright (C) 2005, 2006 Free Software Foundation, Inc. |
3d527b27 | 7 | * |
73be1d9e MV |
8 | * This library is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
3d527b27 | 12 | * |
73be1d9e | 13 | * This library is distributed in the hope that it will be useful, |
3d527b27 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
3d527b27 | 17 | * |
73be1d9e MV |
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 | |
92205699 | 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 21 | */ |
3d527b27 MV |
22 | |
23 | \f | |
24 | ||
9de87eea MV |
25 | /* The null-threads implementation. We provide the subset of the |
26 | standard pthread API that is used by Guile, but no new threads can | |
27 | be created. | |
9bc4701c | 28 | |
9de87eea MV |
29 | This file merely exits so that Guile can be compiled and run |
30 | without using pthreads. Improving performance via optimizations | |
31 | that are possible in a single-threaded program is not a primary | |
32 | goal. | |
d0350293 | 33 | */ |
3d527b27 | 34 | |
9de87eea | 35 | #include <errno.h> |
d0350293 | 36 | |
9de87eea | 37 | /* Threads |
d0350293 | 38 | */ |
9de87eea MV |
39 | #define scm_i_pthread_t int |
40 | #define scm_i_pthread_self() 0 | |
41 | #define scm_i_pthread_create(t,a,f,d) (*(t)=0, (void)(f), ENOSYS) | |
42 | #define scm_i_pthread_detach(t) do { } while (0) | |
43 | #define scm_i_pthread_exit(v) exit(0) | |
2e77f720 LC |
44 | #define scm_i_pthread_cancel(t) 0 |
45 | #define scm_i_pthread_cleanup_push(t,v) 0 | |
46 | #define scm_i_pthread_cleanup_pop(e) 0 | |
9de87eea MV |
47 | #define scm_i_sched_yield() 0 |
48 | ||
49 | /* Signals | |
50 | */ | |
51 | #define scm_i_pthread_sigmask sigprocmask | |
d0350293 | 52 | |
9de87eea MV |
53 | /* Mutexes |
54 | */ | |
55 | #define SCM_I_PTHREAD_MUTEX_INITIALIZER 0 | |
9de87eea MV |
56 | #define scm_i_pthread_mutex_t int |
57 | #define scm_i_pthread_mutex_init(m,a) (*(m) = 0) | |
58 | #define scm_i_pthread_mutex_destroy(m) do { (void)(m); } while(0) | |
59 | #define scm_i_pthread_mutex_trylock(m) ((*(m))++) | |
60 | #define scm_i_pthread_mutex_lock(m) ((*(m))++) | |
61 | #define scm_i_pthread_mutex_unlock(m) ((*(m))--) | |
d1138028 | 62 | #define scm_i_pthread_mutexattr_recursive 0 |
9de87eea MV |
63 | |
64 | /* Condition variables | |
65 | */ | |
66 | #define SCM_I_PTHREAD_COND_INITIALIZER 0 | |
67 | #define scm_i_pthread_cond_t int | |
68 | #define scm_i_pthread_cond_init(c,a) (*(c) = 0) | |
69 | #define scm_i_pthread_cond_destroy(c) do { (void)(c); } while(0) | |
70 | #define scm_i_pthread_cond_signal(c) (*(c) = 1) | |
71 | #define scm_i_pthread_cond_broadcast(c) (*(c) = 1) | |
72 | #define scm_i_pthread_cond_wait(c,m) (abort(), 0) | |
73 | #define scm_i_pthread_cond_timedwait(c,m,t) (abort(), 0) | |
74 | ||
75 | /* Onces | |
76 | */ | |
77 | #define scm_i_pthread_once_t int | |
78 | #define SCM_I_PTHREAD_ONCE_INIT 0 | |
79 | #define scm_i_pthread_once(o,f) do { \ | |
80 | if(!*(o)) { *(o)=1; f (); } \ | |
81 | } while(0) | |
d0350293 | 82 | |
9de87eea MV |
83 | /* Thread specific storage |
84 | */ | |
85 | typedef struct scm_i_pthread_key_t { | |
86 | struct scm_i_pthread_key_t *next; | |
87 | void *value; | |
88 | void (*destr_func) (void *); | |
89 | } scm_i_pthread_key_t; | |
90 | ||
91 | SCM_API int scm_i_pthread_key_create (scm_i_pthread_key_t *key, | |
92 | void (*destr_func) (void *)); | |
93 | #define scm_i_pthread_setspecific(k,p) ((k).value = (p)) | |
94 | #define scm_i_pthread_getspecific(k) ((k).value) | |
95 | ||
96 | /* Convenience functions | |
97 | */ | |
98 | #define scm_i_scm_pthread_mutex_lock scm_i_pthread_mutex_lock | |
661ae7ab | 99 | #define scm_i_dynwind_pthread_mutex_lock scm_i_pthread_mutex_lock |
9de87eea MV |
100 | #define scm_i_scm_pthread_cond_wait scm_i_pthread_cond_wait |
101 | #define scm_i_scm_pthread_cond_timedwait scm_i_pthread_cond_timedwait | |
3d527b27 | 102 | |
3d527b27 | 103 | |
d0350293 | 104 | #endif /* SCM_NULL_THREADS_H */ |
3d527b27 MV |
105 | |
106 | /* | |
107 | Local Variables: | |
108 | c-file-style: "gnu" | |
109 | End: | |
110 | */ |