| 1 | /* classes: h_files */ |
| 2 | |
| 3 | #ifndef MIT_PTHREADSH |
| 4 | #define MIT_PTHREADSH |
| 5 | |
| 6 | /* Copyright (C) 1996 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 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, |
| 48 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ |
| 49 | \f |
| 50 | |
| 51 | #include "libguile/__scm.h" |
| 52 | |
| 53 | #define PTHREAD_KERNEL |
| 54 | #include <pthread.h> |
| 55 | |
| 56 | /* Identify where the stack pointer can be found in a jmpbuf. |
| 57 | */ |
| 58 | |
| 59 | /* Solaris 2.4 */ |
| 60 | #if defined(__sparc_setjmp_h) |
| 61 | # define THREAD_SP machdep_data.machdep_state[2] |
| 62 | #endif |
| 63 | |
| 64 | /* Solaris 2.5 */ |
| 65 | #if defined(__sparc) |
| 66 | #ifndef THREAD_SP |
| 67 | # define THREAD_SP machdep_data.machdep_state[2] |
| 68 | #endif |
| 69 | #endif |
| 70 | |
| 71 | #if defined(linux) |
| 72 | # define THREAD_SP machdep_data.machdep_state[0].__sp |
| 73 | #endif |
| 74 | |
| 75 | #if defined(sgi) |
| 76 | # define THREAD_SP machdep_data.machdep_state[JB_SP] |
| 77 | #endif |
| 78 | |
| 79 | /* ...define THREAD_SP for your architecture here... |
| 80 | */ |
| 81 | |
| 82 | #if !defined(THREAD_SP) |
| 83 | --> where is your stack pointer? |
| 84 | #endif |
| 85 | |
| 86 | \f |
| 87 | |
| 88 | /* Boost the priority of this thread so that it is the only |
| 89 | one running. PTHREAD_MAX_PRIORITY is reserved for this |
| 90 | purpose */ |
| 91 | |
| 92 | #define SCM_THREAD_CRITICAL_SECTION_START \ |
| 93 | struct sched_param param; \ |
| 94 | int previous_prio; \ |
| 95 | int policy; \ |
| 96 | pthread_getschedparam(pthread_self(), &policy, ¶m); \ |
| 97 | previous_prio = param.prio; \ |
| 98 | param.prio = PTHREAD_MAX_PRIORITY; \ |
| 99 | pthread_setschedparam(pthread_self(), policy, ¶m) |
| 100 | |
| 101 | #define SCM_THREAD_CRITICAL_SECTION_END \ |
| 102 | param.prio = previous_prio; \ |
| 103 | pthread_setschedparam(pthread_self(), policy, ¶m) |
| 104 | |
| 105 | \f |
| 106 | |
| 107 | #if 1 |
| 108 | |
| 109 | #define SCM_NO_CRITICAL_SECTION_OWNER 0 |
| 110 | |
| 111 | #define SCM_THREAD_DEFER pthread_kernel_lock++ |
| 112 | #define SCM_THREAD_ALLOW pthread_kernel_lock-- |
| 113 | |
| 114 | #define SCM_THREAD_REDEFER pthread_kernel_lock++ |
| 115 | #define SCM_THREAD_REALLOW_1 pthread_kernel_lock-- |
| 116 | #define SCM_THREAD_REALLOW_2 \ |
| 117 | do { \ |
| 118 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
| 119 | pthread_mutex_unlock(&scm_critical_section_mutex); \ |
| 120 | } while (0) |
| 121 | |
| 122 | #else |
| 123 | |
| 124 | #define SCM_NO_CRITICAL_SECTION_OWNER 0 |
| 125 | |
| 126 | #define SCM_THREAD_DEFER \ |
| 127 | do { \ |
| 128 | pthread_mutex_lock (&scm_critical_section_mutex); \ |
| 129 | scm_critical_section_owner = pthread_self(); \ |
| 130 | } while (0) |
| 131 | |
| 132 | #define SCM_THREAD_ALLOW \ |
| 133 | do { \ |
| 134 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
| 135 | pthread_mutex_unlock (&scm_critical_section_mutex); \ |
| 136 | } while (0) |
| 137 | |
| 138 | #define SCM_THREAD_REDEFER \ |
| 139 | do { \ |
| 140 | if ((scm_critical_section_owner != pthread_self()) || \ |
| 141 | (scm_critical_section_owner == SCM_NO_CRITICAL_SECTION_OWNER)) \ |
| 142 | { \ |
| 143 | pthread_mutex_lock(&scm_critical_section_mutex); \ |
| 144 | scm_critical_section_owner = pthread_self(); \ |
| 145 | } \ |
| 146 | } while (0) |
| 147 | |
| 148 | #define SCM_THREAD_REALLOW_1 |
| 149 | #define SCM_THREAD_REALLOW_2 \ |
| 150 | do { \ |
| 151 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
| 152 | pthread_mutex_unlock (&scm_critical_section_mutex); \ |
| 153 | } while (0) |
| 154 | |
| 155 | #endif |
| 156 | |
| 157 | #define SCM_THREAD_SWITCHING_CODE |
| 158 | |
| 159 | #define SCM_THREAD_LOCAL_DATA (pthread_self () -> attr.arg_attr) |
| 160 | #define SCM_SET_THREAD_LOCAL_DATA(new_root) \ |
| 161 | do { \ |
| 162 | pthread_t t = pthread_self (); \ |
| 163 | void *r = (new_root); \ |
| 164 | pthread_attr_setcleanup (&t -> attr, NULL, r); \ |
| 165 | pthreads_find_info (t) -> root = r; \ |
| 166 | } while (0) |
| 167 | |
| 168 | |
| 169 | \f |
| 170 | |
| 171 | void scm_threads_init_mit_pthreads (); |
| 172 | |
| 173 | typedef struct QUEUE { |
| 174 | struct QUEUE *flink, *blink; |
| 175 | } queue; |
| 176 | |
| 177 | extern pthread_mutex_t scm_critical_section_mutex; |
| 178 | extern pthread_t scm_critical_section_owner; |
| 179 | |
| 180 | /* Key to thread specific data */ |
| 181 | extern pthread_key_t info_key; |
| 182 | |
| 183 | struct scm_pthread_create_info_type |
| 184 | { |
| 185 | SCM thunk; |
| 186 | SCM error; |
| 187 | SCM *prots; |
| 188 | } scm_pthread_create_info; |
| 189 | |
| 190 | #endif /* MIT_PTHREADSH */ |