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7bfd3b9e JB |
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 | |
82892bed JB |
20 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
21 | * Boston, MA 02111-1307 USA | |
7bfd3b9e JB |
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. | |
82892bed | 45 | * If you do not wish that, delete this exception notice. */ |
d3a6bc94 GB |
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 */ | |
7bfd3b9e JB |
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 \ | |
d3a6bc94 | 117 | do { \ |
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118 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
119 | pthread_mutex_unlock(&scm_critical_section_mutex); \ | |
d3a6bc94 | 120 | } while (0) |
7bfd3b9e JB |
121 | |
122 | #else | |
123 | ||
124 | #define SCM_NO_CRITICAL_SECTION_OWNER 0 | |
125 | ||
126 | #define SCM_THREAD_DEFER \ | |
d3a6bc94 | 127 | do { \ |
7bfd3b9e JB |
128 | pthread_mutex_lock (&scm_critical_section_mutex); \ |
129 | scm_critical_section_owner = pthread_self(); \ | |
d3a6bc94 | 130 | } while (0) |
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131 | |
132 | #define SCM_THREAD_ALLOW \ | |
d3a6bc94 | 133 | do { \ |
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134 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
135 | pthread_mutex_unlock (&scm_critical_section_mutex); \ | |
d3a6bc94 | 136 | } while (0) |
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137 | |
138 | #define SCM_THREAD_REDEFER \ | |
d3a6bc94 | 139 | do { \ |
7bfd3b9e JB |
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 | } \ | |
d3a6bc94 | 146 | } while (0) |
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147 | |
148 | #define SCM_THREAD_REALLOW_1 | |
149 | #define SCM_THREAD_REALLOW_2 \ | |
d3a6bc94 | 150 | do { \ |
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151 | scm_critical_section_owner = SCM_NO_CRITICAL_SECTION_OWNER; \ |
152 | pthread_mutex_unlock (&scm_critical_section_mutex); \ | |
d3a6bc94 | 153 | } while (0) |
7bfd3b9e JB |
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) \ | |
d3a6bc94 | 161 | do { \ |
7bfd3b9e JB |
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; \ | |
d3a6bc94 | 166 | } while (0) |
7bfd3b9e JB |
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 */ |