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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 | |
9de87eea | 6 | /* Copyright (C) 2005 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 | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
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) | |
44 | #define scm_i_sched_yield() 0 | |
45 | ||
46 | /* Signals | |
47 | */ | |
48 | #define scm_i_pthread_sigmask sigprocmask | |
d0350293 | 49 | |
9de87eea MV |
50 | /* Mutexes |
51 | */ | |
52 | #define SCM_I_PTHREAD_MUTEX_INITIALIZER 0 | |
53 | #define SCM_I_PTHREAD_RECURSIVE_MUTEX_INITIALIZER 0 | |
54 | #define scm_i_pthread_mutex_t int | |
55 | #define scm_i_pthread_mutex_init(m,a) (*(m) = 0) | |
56 | #define scm_i_pthread_mutex_destroy(m) do { (void)(m); } while(0) | |
57 | #define scm_i_pthread_mutex_trylock(m) ((*(m))++) | |
58 | #define scm_i_pthread_mutex_lock(m) ((*(m))++) | |
59 | #define scm_i_pthread_mutex_unlock(m) ((*(m))--) | |
60 | ||
61 | /* Condition variables | |
62 | */ | |
63 | #define SCM_I_PTHREAD_COND_INITIALIZER 0 | |
64 | #define scm_i_pthread_cond_t int | |
65 | #define scm_i_pthread_cond_init(c,a) (*(c) = 0) | |
66 | #define scm_i_pthread_cond_destroy(c) do { (void)(c); } while(0) | |
67 | #define scm_i_pthread_cond_signal(c) (*(c) = 1) | |
68 | #define scm_i_pthread_cond_broadcast(c) (*(c) = 1) | |
69 | #define scm_i_pthread_cond_wait(c,m) (abort(), 0) | |
70 | #define scm_i_pthread_cond_timedwait(c,m,t) (abort(), 0) | |
71 | ||
72 | /* Onces | |
73 | */ | |
74 | #define scm_i_pthread_once_t int | |
75 | #define SCM_I_PTHREAD_ONCE_INIT 0 | |
76 | #define scm_i_pthread_once(o,f) do { \ | |
77 | if(!*(o)) { *(o)=1; f (); } \ | |
78 | } while(0) | |
d0350293 | 79 | |
9de87eea MV |
80 | /* Thread specific storage |
81 | */ | |
82 | typedef struct scm_i_pthread_key_t { | |
83 | struct scm_i_pthread_key_t *next; | |
84 | void *value; | |
85 | void (*destr_func) (void *); | |
86 | } scm_i_pthread_key_t; | |
87 | ||
88 | SCM_API int scm_i_pthread_key_create (scm_i_pthread_key_t *key, | |
89 | void (*destr_func) (void *)); | |
90 | #define scm_i_pthread_setspecific(k,p) ((k).value = (p)) | |
91 | #define scm_i_pthread_getspecific(k) ((k).value) | |
92 | ||
93 | /* Convenience functions | |
94 | */ | |
95 | #define scm_i_scm_pthread_mutex_lock scm_i_pthread_mutex_lock | |
96 | #define scm_i_frame_pthread_mutex_lock scm_i_pthread_mutex_lock | |
97 | #define scm_i_scm_pthread_cond_wait scm_i_pthread_cond_wait | |
98 | #define scm_i_scm_pthread_cond_timedwait scm_i_pthread_cond_timedwait | |
3d527b27 | 99 | |
3d527b27 | 100 | |
d0350293 | 101 | #endif /* SCM_NULL_THREADS_H */ |
3d527b27 MV |
102 | |
103 | /* | |
104 | Local Variables: | |
105 | c-file-style: "gnu" | |
106 | End: | |
107 | */ |