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1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_COOP_PTHREADS_H | |
4 | #define SCM_COOP_PTHREADS_H | |
5 | ||
102dbb6f | 6 | /* Copyright (C) 2002, 2006, 2008 Free Software Foundation, Inc. |
d97eb496 | 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. | |
d97eb496 | 12 | * |
73be1d9e | 13 | * This library is distributed in the hope that it will be useful, |
d97eb496 | 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. | |
d97eb496 | 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 | */ |
d97eb496 MV |
22 | |
23 | \f | |
24 | ||
0019d6a1 MV |
25 | /* The coop-pthreads implementation. We use pthreads for the basic |
26 | multi threading stuff, but rig it so that only one thread is ever | |
27 | active inside Guile. | |
d97eb496 MV |
28 | */ |
29 | ||
30 | #include <pthread.h> | |
31 | ||
76734914 MD |
32 | #include "libguile/iselect.h" |
33 | ||
9be8bb45 MD |
34 | #if (SCM_ENABLE_DEPRECATED == 1) |
35 | ||
36 | /* Thread local data support --- generic C API */ | |
37 | ||
38 | typedef pthread_key_t scm_t_key; | |
39 | ||
40 | #define scm_key_create pthread_key_create | |
41 | #define scm_setspecific pthread_setspecific | |
42 | #define scm_getspecific pthread_getspecific | |
43 | #define scm_key_delete pthread_key_delete | |
44 | ||
45 | #endif /* SCM_ENABLE_DEPRECATED == 1 */ | |
46 | ||
d97eb496 MV |
47 | /* Since only one thread can be active anyway, we don't need to do |
48 | anything special around critical sections. In fact, that's the | |
49 | reason we do only support cooperative threading: Guile's critical | |
50 | regions have not been completely identified yet. (I think.) */ | |
51 | ||
52 | #define SCM_CRITICAL_SECTION_START | |
53 | #define SCM_CRITICAL_SECTION_END | |
54 | ||
0019d6a1 | 55 | #define SCM_I_THREAD_SWITCH_COUNT 50 |
d97eb496 | 56 | |
d97eb496 MV |
57 | #define SCM_THREAD_SWITCHING_CODE \ |
58 | do { \ | |
0019d6a1 MV |
59 | scm_i_switch_counter--; \ |
60 | if (scm_i_switch_counter == 0) \ | |
d97eb496 | 61 | { \ |
0019d6a1 | 62 | scm_i_switch_counter = SCM_I_THREAD_SWITCH_COUNT; \ |
d97eb496 MV |
63 | scm_yield(); \ |
64 | } \ | |
65 | } while (0) | |
66 | ||
0019d6a1 | 67 | SCM_API int scm_i_switch_counter; |
d97eb496 | 68 | |
0019d6a1 MV |
69 | #define SCM_THREAD_LOCAL_DATA (scm_i_copt_thread_data) |
70 | #define SCM_SET_THREAD_LOCAL_DATA(ptr) (scm_i_copt_set_thread_data (ptr)) | |
d97eb496 | 71 | |
0019d6a1 | 72 | SCM_API void *scm_i_copt_thread_data; |
102dbb6f | 73 | SCM_INTERNAL void scm_i_copt_set_thread_data (void *data); |
d97eb496 MV |
74 | |
75 | #endif /* SCM_COOP_PTHREAD_H */ | |
76 | ||
77 | /* | |
78 | Local Variables: | |
79 | c-file-style: "gnu" | |
80 | End: | |
81 | */ |