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1 | /* GNU Objective C Runtime Thread Interface - OS/2 emx Implementation |
2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
3 | Contributed by Thomas Baier (baier@ci.tuwien.ac.at) | |
4 | ||
38709cad | 5 | This file is part of GCC. |
88e17b57 | 6 | |
38709cad | 7 | GCC is free software; you can redistribute it and/or modify it under the |
88e17b57 BE |
8 | terms of the GNU General Public License as published by the Free Software |
9 | Foundation; either version 2, or (at your option) any later version. | |
10 | ||
38709cad | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
88e17b57 BE |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | |
14 | details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
38709cad | 17 | along with GCC; see the file COPYING. If not, write to |
88e17b57 BE |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* As a special exception, if you link this library with files compiled with | |
22 | GCC to produce an executable, this does not cause the resulting executable | |
23 | to be covered by the GNU General Public License. This exception does not | |
24 | however invalidate any other reasons why the executable file might be | |
25 | covered by the GNU General Public License. */ | |
26 | ||
27 | #include <objc/thr.h> | |
28 | #include "runtime.h" | |
29 | ||
30 | #define INCL_DOSSEMAPHORES | |
31 | #define INCL_DOSPROCESS | |
32 | ||
33 | /* | |
34 | * conflicts with objc.h: SEL, BOOL, id | |
35 | * solution: prefixing those with _OS2_ before including <os2.h> | |
36 | */ | |
37 | #define SEL _OS2_SEL | |
38 | #define BOOL _OS2_BOOL | |
39 | #define id _OS2_id | |
40 | #include <os2.h> | |
41 | #undef id | |
42 | #undef SEL | |
43 | #undef BOOL | |
44 | ||
45 | #include <stdlib.h> | |
46 | ||
47 | /* Backend initialization functions */ | |
48 | ||
49 | /* Initialize the threads subsystem. */ | |
50 | int | |
51 | __objc_init_thread_system(void) | |
52 | { | |
53 | return 0; | |
54 | } | |
55 | ||
56 | /* Close the threads subsystem. */ | |
57 | int | |
58 | __objc_close_thread_system(void) | |
59 | { | |
60 | return 0; | |
61 | } | |
62 | ||
63 | /* Backend thread functions */ | |
64 | ||
65 | /* Create a new thread of execution. */ | |
66 | objc_thread_t | |
67 | __objc_thread_detach(void (*func)(void *arg), void *arg) | |
68 | { | |
69 | int thread_id = 0; | |
70 | ||
71 | if ((thread_id = _beginthread (func,NULL,32768,arg)) < 0) | |
72 | thread_id = 0; | |
73 | ||
74 | return (objc_thread_t)thread_id; | |
75 | } | |
76 | ||
77 | /* Set the current thread's priority. */ | |
78 | int | |
79 | __objc_thread_set_priority(int priority) | |
80 | { | |
81 | ULONG sys_class = 0; | |
82 | ULONG sys_priority = 0; | |
83 | ||
84 | /* OBJC_THREAD_INTERACTIVE_PRIORITY -> PRTYC_FOREGROUNDSERVER | |
85 | * OBJC_THREAD_BACKGROUND_PRIORITY -> PRTYC_REGULAR | |
86 | * OBJC_THREAD_LOW_PRIORITY -> PRTYC_IDLETIME */ | |
87 | ||
88 | switch (priority) { | |
89 | case OBJC_THREAD_INTERACTIVE_PRIORITY: | |
90 | sys_class = PRTYC_REGULAR; | |
91 | sys_priority = 10; | |
92 | break; | |
93 | default: | |
94 | case OBJC_THREAD_BACKGROUND_PRIORITY: | |
95 | sys_class = PRTYC_IDLETIME; | |
96 | sys_priority = 25; | |
97 | break; | |
98 | case OBJC_THREAD_LOW_PRIORITY: | |
99 | sys_class = PRTYC_IDLETIME; | |
100 | sys_priority = 0; | |
101 | break; | |
102 | } | |
103 | ||
104 | /* Change priority */ | |
105 | if (!DosSetPriority (PRTYS_THREAD,sys_class,sys_priority,*_threadid)) | |
106 | return 0; | |
107 | else | |
108 | return -1; | |
109 | } | |
110 | ||
111 | /* Return the current thread's priority. */ | |
112 | int | |
113 | __objc_thread_get_priority(void) | |
114 | { | |
115 | PTIB ptib; | |
116 | PPIB ppib; | |
117 | ||
118 | /* get information about current thread */ | |
119 | DosGetInfoBlocks (&ptib,&ppib); | |
120 | ||
121 | switch (ptib->tib_ptib2->tib2_ulpri) | |
122 | { | |
123 | case PRTYC_IDLETIME: | |
124 | case PRTYC_REGULAR: | |
125 | case PRTYC_TIMECRITICAL: | |
126 | case PRTYC_FOREGROUNDSERVER: | |
127 | default: | |
128 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
129 | } | |
130 | ||
131 | return -1; | |
132 | } | |
133 | ||
134 | /* Yield our process time to another thread. */ | |
135 | void | |
136 | __objc_thread_yield(void) | |
137 | { | |
138 | DosSleep (0); | |
139 | } | |
140 | ||
141 | /* Terminate the current thread. */ | |
142 | int | |
143 | __objc_thread_exit(void) | |
144 | { | |
145 | /* terminate the thread, NEVER use DosExit () */ | |
146 | _endthread (); | |
147 | ||
148 | /* Failed if we reached here */ | |
149 | return -1; | |
150 | } | |
151 | ||
152 | /* Returns an integer value which uniquely describes a thread. */ | |
153 | objc_thread_t | |
154 | __objc_thread_id(void) | |
155 | { | |
156 | return (objc_thread_t) *_threadid; | |
157 | } | |
158 | ||
159 | /* Sets the thread's local storage pointer. */ | |
160 | int | |
161 | __objc_thread_set_data(void *value) | |
162 | { | |
163 | *_threadstore () = value; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | /* Returns the thread's local storage pointer. */ | |
169 | void * | |
170 | __objc_thread_get_data(void) | |
171 | { | |
172 | return *_threadstore (); | |
173 | } | |
174 | ||
175 | /* Backend mutex functions */ | |
176 | ||
177 | /* Allocate a mutex. */ | |
178 | int | |
179 | __objc_mutex_allocate(objc_mutex_t mutex) | |
180 | { | |
181 | if (DosCreateMutexSem (NULL, (HMTX)(&(mutex->backend)),0L,0) > 0) | |
182 | return -1; | |
183 | else | |
184 | return 0; | |
185 | } | |
186 | ||
187 | /* Deallocate a mutex. */ | |
188 | int | |
189 | __objc_mutex_deallocate(objc_mutex_t mutex) | |
190 | { | |
191 | DosCloseMutexSem ((HMTX)(mutex->backend)); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | /* Grab a lock on a mutex. */ | |
196 | int | |
197 | __objc_mutex_lock(objc_mutex_t mutex) | |
198 | { | |
199 | if (DosRequestMutexSem ((HMTX)(mutex->backend),-1L) != 0) | |
200 | return -1; | |
201 | else | |
202 | return 0; | |
203 | } | |
204 | ||
205 | /* Try to grab a lock on a mutex. */ | |
206 | int | |
207 | __objc_mutex_trylock(objc_mutex_t mutex) | |
208 | { | |
209 | if (DosRequestMutexSem ((HMTX)(mutex->backend),0L) != 0) | |
210 | return -1; | |
211 | else | |
212 | return 0; | |
213 | } | |
214 | ||
215 | /* Unlock the mutex */ | |
216 | int | |
217 | __objc_mutex_unlock(objc_mutex_t mutex) | |
218 | { | |
219 | if (DosReleaseMutexSem((HMTX)(mutex->backend)) != 0) | |
220 | return -1; | |
221 | else | |
222 | return 0; | |
223 | } | |
224 | ||
225 | /* Backend condition mutex functions */ | |
226 | ||
227 | /* Allocate a condition. */ | |
228 | int | |
229 | __objc_condition_allocate(objc_condition_t condition) | |
230 | { | |
231 | /* Unimplemented. */ | |
232 | return -1; | |
233 | } | |
234 | ||
235 | /* Deallocate a condition. */ | |
236 | int | |
237 | __objc_condition_deallocate(objc_condition_t condition) | |
238 | { | |
239 | /* Unimplemented. */ | |
240 | return -1; | |
241 | } | |
242 | ||
243 | /* Wait on the condition */ | |
244 | int | |
245 | __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex) | |
246 | { | |
247 | /* Unimplemented. */ | |
248 | return -1; | |
249 | } | |
250 | ||
251 | /* Wake up all threads waiting on this condition. */ | |
252 | int | |
253 | __objc_condition_broadcast(objc_condition_t condition) | |
254 | { | |
255 | /* Unimplemented. */ | |
256 | return -1; | |
257 | } | |
258 | ||
259 | /* Wake up one thread waiting on this condition. */ | |
260 | int | |
261 | __objc_condition_signal(objc_condition_t condition) | |
262 | { | |
263 | /* Unimplemented. */ | |
264 | return -1; | |
265 | } | |
266 | ||
267 | /* End of File */ |