src/native/vm/java_lang_Thread.c

   1 /* src/native/vm/java_lang_Thread.c - java/lang/Thread functions
   2
   3    Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, Institut f. Computersprachen - TU Wien
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25    $Id: java_lang_Thread.c 7833 2007-04-26 13:07:05Z twisti $
  26
  27 */
  28
  29
  30 #include "config.h"
  31 #include "vm/types.h"
  32
  33 #include "native/jni.h"
  34 #include "native/native.h"
  35
  36 #include "native/include/java_lang_String.h"
  37 #include "native/include/java_lang_Object.h"            /* java_lang_Thread.h */
  38 #include "native/include/java_lang_Throwable.h"         /* java_lang_Thread.h */
  39 #include "native/include/java_lang_Thread.h"
  40
  41 #if defined(ENABLE_JAVASE)
  42 # include "native/include/java_lang_ThreadGroup.h"
  43 # include "native/include/java_lang_VMThread.h"
  44 #endif
  45
  46 #include "threads/lock-common.h"
  47 #include "threads/threads-common.h"
  48
  49 #include "toolbox/logging.h"
  50
  51 #include "vm/builtin.h"
  52 #include "vm/exceptions.h"
  53 #include "vm/stringlocal.h"
  54
  55 #include "vmcore/options.h"
  56
  57
  58 /*
  59  * Class:     java/lang/Thread
  60  * Method:    countStackFrames
  61  * Signature: ()I
  62  */
  63 s4 _Jv_java_lang_Thread_countStackFrames(java_lang_Thread *this)
  64 {
  65     log_text("java_lang_Thread_countStackFrames called");
  66
  67     return 0;
  68 }
  69
  70
  71 /*
  72  * Class:     java/lang/Thread
  73  * Method:    sleep
  74  * Signature: (J)V
  75  */
  76 void _Jv_java_lang_Thread_sleep(s8 millis)
  77 {
  78 #if defined(ENABLE_THREADS)
  79         threads_sleep(millis, 0);
  80 #endif
  81 }
  82
  83
  84 /*
  85  * Class:     java/lang/Thread
  86  * Method:    start
  87  * Signature: (J)V
  88  */
  89 void _Jv_java_lang_Thread_start(java_lang_Thread *this, s8 stacksize)
  90 {
  91 #if defined(ENABLE_THREADS)
  92         threads_thread_start(this);
  93 #endif
  94 }
  95
  96
  97 /*
  98  * Class:     java/lang/Thread
  99  * Method:    interrupt
 100  * Signature: ()V
 101  */
 102 void _Jv_java_lang_Thread_interrupt(java_lang_Thread *this)
 103 {
 104 #if defined(ENABLE_THREADS)
 105         threadobject *thread;
 106
 107 #if defined(WITH_CLASSPATH_GNU)
 108         thread = (threadobject *) this->vmThread->vmdata;
 109 #elif defined(WITH_CLASSPATH_CLDC1_1)
 110         thread = (threadobject *) this->vm_thread;
 111 #endif
 112
 113         threads_thread_interrupt(thread);
 114 #endif
 115 }
 116
 117
 118 /*
 119  * Class:     java/lang/Thread
 120  * Method:    isAlive
 121  * Signature: ()Z
 122  */
 123 s4 _Jv_java_lang_Thread_isAlive(java_lang_Thread *this)
 124 {
 125 #if defined(ENABLE_THREADS)
 126         threadobject *thread;
 127
 128 #if defined(WITH_CLASSPATH_GNU)
 129         thread = (threadobject *) this->vmThread->vmdata;
 130 #elif defined(WITH_CLASSPATH_CLDC1_1)
 131         thread = (threadobject *) this->vm_thread;
 132 #endif
 133
 134         return threads_thread_is_alive(thread);
 135 #else
 136         /* if threads are disabled, the only thread running is alive */
 137
 138         return 1;
 139 #endif
 140 }
 141
 142
 143 /*
 144  * Class:     java/lang/Thread
 145  * Method:    isInterrupted
 146  * Signature: ()Z
 147  */
 148 s4 _Jv_java_lang_Thread_isInterrupted(java_lang_Thread *this)
 149 {
 150 #if defined(ENABLE_THREADS)
 151         threadobject *thread;
 152
 153 #if defined(WITH_CLASSPATH_GNU)
 154         thread = (threadobject *) this->vmThread->vmdata;
 155 #elif defined(WITH_CLASSPATH_CLDC1_1)
 156         thread = (threadobject *) this->vm_thread;
 157 #endif
 158
 159         return threads_thread_has_been_interrupted(thread);
 160 #else
 161         return 0;
 162 #endif
 163 }
 164
 165
 166 /*
 167  * Class:     java/lang/Thread
 168  * Method:    suspend
 169  * Signature: ()V
 170  */
 171 void _Jv_java_lang_Thread_suspend(java_lang_Thread *this)
 172 {
 173 #if defined(ENABLE_THREADS)
 174 #endif
 175 }
 176
 177
 178 /*
 179  * Class:     java/lang/Thread
 180  * Method:    resume
 181  * Signature: ()V
 182  */
 183 void _Jv_java_lang_Thread_resume(java_lang_Thread *this)
 184 {
 185 #if defined(ENABLE_THREADS)
 186 #endif
 187 }
 188
 189
 190 /*
 191  * Class:     java/lang/Thread
 192  * Method:    setPriority
 193  * Signature: (I)V
 194  */
 195 void _Jv_java_lang_Thread_setPriority(java_lang_Thread *this, s4 priority)
 196 {
 197 #if defined(ENABLE_THREADS)
 198         threadobject *thread;
 199
 200 #if defined(WITH_CLASSPATH_GNU)
 201         thread = (threadobject *) this->vmThread->vmdata;
 202 #elif defined(WITH_CLASSPATH_CLDC1_1)
 203         thread = (threadobject *) this->vm_thread;
 204
 205         /* The threadobject is null when a thread is created in Java. The
 206            priority is set later during startup. */
 207
 208         if (thread == NULL)
 209                 return;
 210 #endif
 211
 212         threads_set_thread_priority(thread->tid, priority);
 213 #endif
 214 }
 215
 216
 217 /*
 218  * Class:     java/lang/Thread
 219  * Method:    stop
 220  * Signature: (Ljava/lang/Object;)V
 221  */
 222 void _Jv_java_lang_Thread_stop(java_lang_Thread *this, java_lang_Throwable *t)
 223 {
 224 #if defined(ENABLE_THREADS)
 225 #endif
 226 }
 227
 228
 229 /*
 230  * Class:     java/lang/Thread
 231  * Method:    currentThread
 232  * Signature: ()Ljava/lang/Thread;
 233  */
 234 java_lang_Thread *_Jv_java_lang_Thread_currentThread(void)
 235 {
 236 #if defined(ENABLE_THREADS)
 237         threadobject     *thread;
 238 #endif
 239         java_lang_Thread *t;
 240
 241 #if defined(ENABLE_THREADS)
 242         thread = THREADOBJECT;
 243
 244         t = thread->object;
 245
 246         if (t == NULL)
 247                 log_text("t ptr is NULL\n");
 248
 249 # if defined(ENABLE_JAVASE)
 250         if (t->group == NULL) {
 251                 /* ThreadGroup of currentThread is not initialized */
 252
 253                 t->group = (java_lang_ThreadGroup *)
 254                         native_new_and_init(class_java_lang_ThreadGroup);
 255
 256                 if (t->group == NULL)
 257                         log_text("unable to create ThreadGroup");
 258         }
 259 # endif
 260 #else
 261         /* we just return a fake java.lang.Thread object, otherwise we get
 262        NullPointerException's in GNU classpath */
 263
 264         t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
 265 #endif
 266
 267         return t;
 268 }
 269
 270
 271 /*
 272  * Class:     java/lang/Thread
 273  * Method:    yield
 274  * Signature: ()V
 275  */
 276 void _Jv_java_lang_Thread_yield(void)
 277 {
 278 #if defined(ENABLE_THREADS)
 279         threads_yield();
 280 #endif
 281 }
 282
 283
 284 /*
 285  * Class:     java/lang/Thread
 286  * Method:    interrupted
 287  * Signature: ()Z
 288  */
 289 s4 _Jv_java_lang_Thread_interrupted(void)
 290 {
 291 #if defined(ENABLE_THREADS)
 292         return threads_check_if_interrupted_and_reset();
 293 #else
 294         return 0;
 295 #endif
 296 }
 297
 298
 299 /*
 300  * Class:     java/lang/Thread
 301  * Method:    holdsLock
 302  * Signature: (Ljava/lang/Object;)Z
 303  */
 304 s4 _Jv_java_lang_Thread_holdsLock(java_lang_Object* obj)
 305 {
 306 #if defined(ENABLE_THREADS)
 307         java_objectheader *o;
 308
 309         o = (java_objectheader *) obj;
 310
 311         if (o == NULL) {
 312                 exceptions_throw_nullpointerexception();
 313                 return 0;
 314         }
 315
 316         return lock_is_held_by_current_thread(o);
 317 #else
 318         return 0;
 319 #endif
 320 }
 321
 322
 323 /*
 324  * Class:     java/lang/Thread
 325  * Method:    getState
 326  * Signature: ()Ljava/lang/String;
 327  */
 328 java_lang_String *_Jv_java_lang_Thread_getState(java_lang_Thread *this)
 329 {
 330 #if defined(ENABLE_THREADS)
 331         threadobject      *thread;
 332         utf               *u;
 333         java_objectheader *o;
 334
 335 # if defined(WITH_CLASSPATH_GNU)
 336         thread = (threadobject *) this->vmThread->vmdata;
 337 # elif defined(WITH_CLASSPATH_CLDC1_1)
 338         thread = (threadobject *) this->vm_thread;
 339 # endif
 340
 341         u = threads_thread_get_state(thread);
 342         o = javastring_new(u);
 343
 344         return (java_lang_String *) o;
 345 #else
 346         return NULL;
 347 #endif
 348 }
 349
 350
 351 /*
 352  * These are local overrides for various environment variables in Emacs.
 353  * Please do not remove this and leave it at the end of the file, where
 354  * Emacs will automagically detect them.
 355  * ---------------------------------------------------------------------
 356  * Local variables:
 357  * mode: c
 358  * indent-tabs-mode: t
 359  * c-basic-offset: 4
 360  * tab-width: 4
 361  * End:
 362  */