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1 | /* classes: h_files */ |
2 | ||
3 | #ifndef SCM_FUTURES_H | |
4 | #define SCM_FUTURES_H | |
5 | ||
6 | /* Copyright (C) 2002, 2003 Free Software Foundation, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this software; see the file COPYING. If not, write to | |
20 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
21 | * Boston, MA 02111-1307 USA | |
22 | * | |
23 | * As a special exception, the Free Software Foundation gives permission | |
24 | * for additional uses of the text contained in its release of GUILE. | |
25 | * | |
26 | * The exception is that, if you link the GUILE library with other files | |
27 | * to produce an executable, this does not by itself cause the | |
28 | * resulting executable to be covered by the GNU General Public License. | |
29 | * Your use of that executable is in no way restricted on account of | |
30 | * linking the GUILE library code into it. | |
31 | * | |
32 | * This exception does not however invalidate any other reasons why | |
33 | * the executable file might be covered by the GNU General Public License. | |
34 | * | |
35 | * This exception applies only to the code released by the | |
36 | * Free Software Foundation under the name GUILE. If you copy | |
37 | * code from other Free Software Foundation releases into a copy of | |
38 | * GUILE, as the General Public License permits, the exception does | |
39 | * not apply to the code that you add in this way. To avoid misleading | |
40 | * anyone as to the status of such modified files, you must delete | |
41 | * this exception notice from them. | |
42 | * | |
43 | * If you write modifications of your own for GUILE, it is your choice | |
44 | * whether to permit this exception to apply to your modifications. | |
45 | * If you do not wish that, delete this exception notice. */ | |
46 | ||
47 | \f | |
48 | ||
49 | #include "libguile/__scm.h" | |
50 | #include "libguile/threads.h" | |
51 | ||
52 | \f | |
53 | ||
54 | typedef struct scm_t_future { | |
55 | SCM data; | |
56 | scm_t_mutex mutex; | |
57 | scm_t_cond cond; | |
58 | int status; | |
59 | int die_p; | |
60 | } scm_t_future; | |
61 | ||
62 | #define SCM_FUTURE_DEAD 0 | |
63 | #define SCM_FUTURE_SIGNAL_ME -1 | |
64 | #define SCM_FUTURE_COMPUTING 1 | |
65 | #define SCM_FUTURE_TASK_ASSIGNED 2 | |
66 | ||
67 | #define SCM_VALIDATE_FUTURE(pos, obj) \ | |
68 | SCM_ASSERT_TYPE (SCM_TYP16_PREDICATE (scm_tc16_future, obj), \ | |
69 | obj, pos, FUNC_NAME, "future"); | |
70 | #define SCM_FUTURE(future) ((scm_t_future *) SCM_CELL_WORD_2 (future)) | |
71 | #define SCM_FUTURE_MUTEX(future) (&SCM_FUTURE (future)->mutex) | |
72 | #define SCM_FUTURE_COND(future) (&SCM_FUTURE (future)->cond) | |
73 | #define SCM_FUTURE_STATUS(future) (SCM_FUTURE (future)->status) | |
74 | #define SCM_SET_FUTURE_STATUS(future, x) \ | |
75 | do { SCM_FUTURE (future)->status = (x); } while (0) | |
76 | #define SCM_FUTURE_ALIVE_P(future) (SCM_FUTURE_STATUS (future)) | |
77 | #define SCM_FUTURE_DATA(future) (SCM_FUTURE (future)->data) | |
78 | #define SCM_SET_FUTURE_DATA(future, x) \ | |
79 | do { SCM_FUTURE (future)->data = (x); } while (0) | |
80 | #define SCM_FUTURE_NEXT SCM_CELL_OBJECT_1 | |
81 | #define SCM_FUTURE_NEXTLOC(x) ((SCM *) SCM_CELL_WORD_LOC ((x), 1)) | |
82 | #define SCM_SET_FUTURE_NEXT SCM_SET_CELL_OBJECT_1 | |
83 | ||
84 | SCM_API scm_t_bits scm_tc16_future; | |
85 | ||
86 | extern SCM *scm_loc_sys_thread_handler; | |
87 | ||
88 | SCM_API SCM scm_i_make_future (SCM thunk); | |
89 | SCM_API SCM scm_make_future (SCM thunk); | |
90 | SCM_API SCM scm_future_ref (SCM future); | |
91 | ||
92 | void scm_init_futures (void); | |
93 | ||
94 | #endif /* SCM_FUTURES_H */ | |
95 | ||
96 | /* | |
97 | Local Variables: | |
98 | c-file-style: "gnu" | |
99 | End: | |
100 | */ |