| 1 | /* classes: h_files */ |
| 2 | |
| 3 | #ifndef SCM_NULL_THREADS_H |
| 4 | #define SCM_NULL_THREADS_H |
| 5 | |
| 6 | /* Copyright (C) 2002 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 | /* The null-threads implementation. We provide the standard API, but |
| 50 | no new threads can be created. |
| 51 | */ |
| 52 | |
| 53 | #error temporarily broken, compile with threads enabled (default option) |
| 54 | |
| 55 | /* We can't switch so don't bother trying. |
| 56 | */ |
| 57 | #undef SCM_THREAD_SWITCHING_CODE |
| 58 | #define SCM_THREAD_SWITCHING_CODE |
| 59 | |
| 60 | #define scm_t_thread int |
| 61 | |
| 62 | /* The "(void)(...)" constructs in the expansions are there to ensure |
| 63 | that the side effects of the argument expressions take place. |
| 64 | */ |
| 65 | |
| 66 | #define scm_thread_create(th,proc,data) ((void)(proc), (void)(data), ENOTSUP) |
| 67 | #define scm_thread_join(th) do { (void)(th); abort(); } while(0) |
| 68 | #define scm_thread_detach(th) do { (void)(th); abort(); } while(0) |
| 69 | #define scm_thread_self() 0 |
| 70 | |
| 71 | #define scm_t_mutex int |
| 72 | |
| 73 | #define scm_mutex_init(mx) do { (void)(mx); } while(0) |
| 74 | #define scm_mutex_destroy(mx) do { (void)(mx); } while(0) |
| 75 | #define scm_mutex_lock(mx) do { (void)(mx); } while(0) |
| 76 | #define scm_mutex_trylock(mx) ((void)(mx), 1) |
| 77 | #define scm_mutex_unlock(mx) do { (void)(mx); } while(0) |
| 78 | |
| 79 | #define scm_t_cond int |
| 80 | |
| 81 | #define scm_cond_init(cv) do { (void)(cv); } while(0) |
| 82 | #define scm_cond_destroy(cv) do { (void)(cv); } while(0) |
| 83 | #define scm_cond_wait(cv,mx) ((void)(cv), (void)(mx), ENOTSUP) |
| 84 | #define scm_cond_timedwait(cv,mx,at) ((void)(cv), (void)(mx), (void)(at), \ |
| 85 | ENOTSUP) |
| 86 | #define scm_cond_signal(cv) do { (void)(cv); } while(0) |
| 87 | #define scm_cond_broadcast(cv) do { (void)(cv); } while(0) |
| 88 | |
| 89 | #define scm_thread_select select |
| 90 | |
| 91 | typedef void **scm_t_key; |
| 92 | |
| 93 | #define scm_key_create(keyp) do { *(keyp) = malloc(sizeof(void*)); \ |
| 94 | } while(0) |
| 95 | #define scm_key_delete(key) do { free(key); } while(0) |
| 96 | #define scm_key_setspecific(key, value) do { *(key) = (value); } while(0) |
| 97 | #define scm_key_getspecific(key) *(key) |
| 98 | |
| 99 | #if 0 |
| 100 | |
| 101 | /* These are the actual prototypes of the functions/macros defined |
| 102 | above. We list them here for reference. */ |
| 103 | |
| 104 | typedef int scm_t_thread; |
| 105 | |
| 106 | SCM_API int scm_thread_create (scm_t_thread *th, |
| 107 | void (*proc) (void *), void *data); |
| 108 | SCM_API void scm_thread_join (scm_t_thread th); |
| 109 | SCM_API void scm_thread_detach (scm_t_thread th); |
| 110 | SCM_API scm_t_thread scm_thread_self (void); |
| 111 | |
| 112 | typedef int scm_t_mutex; |
| 113 | |
| 114 | SCM_API void scm_mutex_init (scm_t_mutex *mx); |
| 115 | SCM_API void scm_mutex_destroy (scm_t_mutex *mx); |
| 116 | SCM_API void scm_mutex_lock (scm_t_mutex *mx); |
| 117 | SCM_API int scm_mutex_trylock (scm_t_mutex *mx); |
| 118 | SCM_API void scm_mutex_unlock (scm_t_mutex *mx); |
| 119 | |
| 120 | typedef int scm_t_cond; |
| 121 | |
| 122 | SCM_API void scm_cond_init (scm_t_cond *cv); |
| 123 | SCM_API void scm_cond_destroy (scm_t_cond *cv); |
| 124 | SCM_API void scm_cond_wait (scm_t_cond *cv, scm_t_mutex *mx); |
| 125 | SCM_API int scm_cond_timedwait (scm_t_cond *cv, scm_t_mutex *mx, |
| 126 | struct timespec *abstime); |
| 127 | SCM_API void scm_cond_signal (scm_t_cond *cv); |
| 128 | SCM_API void scm_cond_broadcast (scm_t_cond *cv); |
| 129 | |
| 130 | typedef int scm_t_key; |
| 131 | |
| 132 | SCM_API void scm_key_create (scm_t_key *keyp); |
| 133 | SCM_API void scm_key_delete (scm_t_key key); |
| 134 | SCM_API void scm_key_setspecific (scm_t_key key, const void *value); |
| 135 | SCM_API void *scm_key_getspecific (scm_t_key key); |
| 136 | |
| 137 | SCM_API int scm_thread_select (int nfds, |
| 138 | SELECT_TYPE *readfds, |
| 139 | SELECT_TYPE *writefds, |
| 140 | SELECT_TYPE *exceptfds, |
| 141 | struct timeval *timeout); |
| 142 | |
| 143 | #endif |
| 144 | |
| 145 | #endif /* SCM_NULL_THREADS_H */ |
| 146 | |
| 147 | /* |
| 148 | Local Variables: |
| 149 | c-file-style: "gnu" |
| 150 | End: |
| 151 | */ |