src/bindings/java/jmsg_process.c

   1 /* Functions related to the java process instances.                         */
   2
   3 /* Copyright (c) 2007-2012. The SimGrid Team.
   4  * All rights reserved.                                                     */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7   * under the terms of the license (GNU LGPL) which comes with this package. */
   8 #include "jmsg_process.h"
   9
  10 #include "jmsg.h"
  11 #include "jmsg_host.h"
  12 #include "jxbt_utilities.h"
  13 #include "smx_context_java.h"
  14 #include "smx_context_cojava.h"
  15
  16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
  17
  18 jfieldID jprocess_field_Process_bind;
  19 jfieldID jprocess_field_Process_host;
  20 jfieldID jprocess_field_Process_killTime;
  21 jfieldID jprocess_field_Process_id;
  22 jfieldID jprocess_field_Process_name;
  23 jfieldID jprocess_field_Process_pid;
  24 jfieldID jprocess_field_Process_ppid;
  25
  26 JNIEXPORT void JNICALL
  27 Java_org_simgrid_msg_Process_exit(JNIEnv *env, jobject jprocess) {
  28   if (smx_factory_initializer_to_use == SIMIX_ctx_cojava_factory_init) {
  29     msg_process_t process = jprocess_to_native_process(jprocess, env);
  30     smx_context_t context = MSG_process_get_smx_ctx(process);
  31     smx_ctx_cojava_stop(context);
  32   }
  33 }
  34
  35 jobject native_to_java_process(msg_process_t process)
  36 {
  37   return ((smx_ctx_java_t)MSG_process_get_smx_ctx(process))->jprocess;
  38 }
  39
  40 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
  41 {
  42   return (*env)->NewGlobalRef(env, jprocess);
  43 }
  44
  45 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
  46 {
  47   (*env)->DeleteGlobalRef(env, jprocess);
  48 }
  49
  50 void jprocess_join(jobject jprocess, JNIEnv * env)
  51 {
  52         msg_process_t process = jprocess_to_native_process(jprocess,env);
  53         smx_ctx_java_t context = (smx_ctx_java_t)MSG_process_get_smx_ctx(process);
  54         xbt_os_thread_join(context->thread,NULL);
  55 }
  56
  57 msg_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
  58 {
  59   return
  60     (msg_process_t)(intptr_t)(*env)->GetLongField(env, jprocess,
  61                                                   jprocess_field_Process_bind);
  62 }
  63
  64 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
  65 {
  66   (*env)->SetLongField(env, jprocess, jprocess_field_Process_bind,
  67                        (intptr_t)process);
  68 }
  69
  70 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
  71 {
  72   return
  73     (intptr_t)(*env)->GetLongField(env, jprocess, jprocess_field_Process_id);
  74 }
  75
  76 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
  77 {
  78   jstring jname = (jstring) (*env)->GetObjectField(env, jprocess, jprocess_field_Process_name);
  79   return (*env)->NewGlobalRef(env, jname);
  80
  81 }
  82
  83 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
  84 {
  85   jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
  86
  87   if (!id)
  88     return JNI_FALSE;
  89
  90   return (*env)->GetLongField(env, jprocess, id) ? JNI_TRUE : JNI_FALSE;
  91 }
  92 JNIEXPORT void JNICALL
  93 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  94   jclass jprocess_class_Process = (*env)->FindClass(env, "org/simgrid/msg/Process");
  95
  96   jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  97   jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  98   jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
  99   jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
 100   jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
 101   jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
 102   jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
 103   if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
 104       !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
 105     jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
 106   }
 107 }
 108 JNIEXPORT void JNICALL
 109 Java_org_simgrid_msg_Process_create(JNIEnv * env,
 110                                     jobject jprocess_arg,
 111                                     jobject jhostname)
 112 {
 113
 114
 115   jobject jprocess;             /* the global reference to the java process instance    */
 116   jstring jname;                /* the name of the java process instance                */
 117   const char *name;             /* the C name of the process                            */
 118   const char *hostname;
 119   msg_process_t process;          /* the native process to create                         */
 120   msg_host_t host;                /* Where that process lives */
 121
 122   hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
 123
 124   /* get the name of the java process */
 125   jname = jprocess_get_name(jprocess_arg, env);
 126   if (!jname) {
 127     jxbt_throw_null(env,
 128             xbt_strdup("Internal error: Process name cannot be NULL"));
 129     return;
 130   }
 131
 132   /* bind/retrieve the msg host */
 133   host = MSG_get_host_by_name(hostname);
 134
 135   if (!(host)) {    /* not binded */
 136     jxbt_throw_host_not_found(env, hostname);
 137     return;
 138   }
 139
 140   /* create a global java process instance */
 141   jprocess = jprocess_new_global_ref(jprocess_arg, env);
 142   if (!jprocess) {
 143     jxbt_throw_jni(env, "Can't get a global ref to the java process");
 144     return;
 145   }
 146
 147   /* build the C name of the process */
 148   name = (*env)->GetStringUTFChars(env, jname, 0);
 149   name = xbt_strdup(name);
 150
 151   /* Retrieve the kill time from the process */
 152   jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
 153   /* Actually build the MSG process */
 154   process = MSG_process_create_with_environment(name,
 155                                                 (xbt_main_func_t) jprocess,
 156                                                 /*data*/ jprocess,
 157                                                 host,
 158                                                 /*argc, argv, properties*/
 159                                                 0,NULL,NULL);
 160   MSG_process_set_kill_time(process, (double)jkill);
 161   /* bind the java process instance to the native process */
 162   jprocess_bind(jprocess, process, env);
 163
 164   /* release our reference to the process name (variable name becomes invalid) */
 165   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 166   //(*env)->ReleaseStringUTFChars(env, jname, name);
 167   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 168
 169   /* sets the PID and the PPID of the process */
 170   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 171   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 172   /* sets the Host of the process */
 173   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 174
 175   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 176 }
 177
 178 JNIEXPORT jint JNICALL
 179 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 180                                      jint jresetPID)
 181 {
 182   return (jint) MSG_process_killall((int) jresetPID);
 183 }
 184
 185 JNIEXPORT jobject JNICALL
 186 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 187                                      jint PID)
 188 {
 189   msg_process_t process = MSG_process_from_PID(PID);
 190
 191   if (!process) {
 192     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 193     return NULL;
 194   }
 195
 196   jobject jprocess = native_to_java_process(process);
 197
 198   if (!jprocess) {
 199     jxbt_throw_jni(env, "get process failed");
 200     return NULL;
 201   }
 202
 203   return jprocess;
 204 }
 205 JNIEXPORT jobject JNICALL
 206 Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
 207   msg_process_t process = jprocess_to_native_process(jprocess, env);
 208
 209   if (!process) {
 210     jxbt_throw_notbound(env, "process", jprocess);
 211     return NULL;
 212   }
 213   const char *name = (*env)->GetStringUTFChars(env, jname, 0);
 214
 215   const char *property = MSG_process_get_property_value(process, name);
 216   if (!property) {
 217     return NULL;
 218   }
 219
 220   jobject jproperty = (*env)->NewStringUTF(env, property);
 221
 222   (*env)->ReleaseStringUTFChars(env, jname, name);
 223
 224   return jproperty;
 225 }
 226 JNIEXPORT jobject JNICALL
 227 Java_org_simgrid_msg_Process_currentProcess(JNIEnv * env, jclass cls)
 228 {
 229   msg_process_t process = MSG_process_self();
 230   jobject jprocess;
 231
 232   if (!process) {
 233     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 234     return NULL;
 235   }
 236
 237   jprocess = native_to_java_process(process);
 238
 239   if (!jprocess)
 240     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 241
 242   return jprocess;
 243 }
 244
 245 JNIEXPORT void JNICALL
 246 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
 247                                    jobject jprocess)
 248 {
 249   msg_process_t process = jprocess_to_native_process(jprocess, env);
 250
 251   if (!process) {
 252     jxbt_throw_notbound(env, "process", jprocess);
 253     return;
 254   }
 255
 256   /* try to suspend the process */
 257   msg_error_t rv = MSG_process_suspend(process);
 258
 259   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 260                  bprintf("unexpected error , please report this bug"));
 261
 262 }
 263
 264 JNIEXPORT void JNICALL
 265 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
 266                                      jobject jprocess)
 267 {
 268   msg_process_t process = jprocess_to_native_process(jprocess, env);
 269
 270   if (!process) {
 271     jxbt_throw_notbound(env, "process", jprocess);
 272     return;
 273   }
 274
 275   /* try to resume the process */
 276   msg_error_t rv = MSG_process_resume(process);
 277
 278   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 279                  bprintf("unexpected error , please report this bug"));
 280 }
 281 JNIEXPORT void JNICALL
 282 Java_org_simgrid_msg_Process_setAutoRestart
 283     (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
 284   msg_process_t process = jprocess_to_native_process(jprocess, env);
 285   xbt_ex_t e;
 286
 287   int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
 288
 289   if (!process) {
 290     jxbt_throw_notbound(env, "process", jprocess);
 291     return;
 292   }
 293
 294   TRY {
 295     MSG_process_auto_restart_set(process,auto_restart);
 296   }
 297   CATCH (e) {
 298     xbt_ex_free(e);
 299   }
 300 }
 301 JNIEXPORT void JNICALL
 302 Java_org_simgrid_msg_Process_restart
 303     (JNIEnv *env, jobject jprocess) {
 304   msg_process_t process = jprocess_to_native_process(jprocess, env);
 305   xbt_ex_t e;
 306
 307   if (!process) {
 308     jxbt_throw_notbound(env, "process", jprocess);
 309     return;
 310   }
 311
 312   TRY {
 313     MSG_process_restart(process);
 314   }
 315   CATCH (e) {
 316     xbt_ex_free(e);
 317   }
 318
 319 }
 320 JNIEXPORT jboolean JNICALL
 321 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 322                                          jobject jprocess)
 323 {
 324   msg_process_t process = jprocess_to_native_process(jprocess, env);
 325
 326   if (!process) {
 327     jxbt_throw_notbound(env, "process", jprocess);
 328     return 0;
 329   }
 330
 331   /* true is the process is suspended, false otherwise */
 332   return (jboolean) MSG_process_is_suspended(process);
 333 }
 334
 335 JNIEXPORT void JNICALL
 336 Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
 337  {
 338   double time =  jmillis / 1000 + jnanos / 1000;
 339   msg_error_t rv;
 340   rv = MSG_process_sleep(time);
 341   if (rv != MSG_OK) {
 342     jmsg_throw_status(env,rv);
 343   }
 344 }
 345 JNIEXPORT void JNICALL
 346 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 347                                      jdouble jseconds)
 348 {
 349   msg_error_t rv;
 350   rv = MSG_process_sleep((double)jseconds);
 351   if (rv != MSG_OK) {
 352     XBT_DEBUG("Status NOK");
 353     jmsg_throw_status(env,rv);
 354   }
 355 }
 356
 357 JNIEXPORT void JNICALL
 358 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 359                                   jobject jprocess)
 360 {
 361         /* get the native instances from the java ones */
 362   msg_process_t process = jprocess_to_native_process(jprocess, env);
 363   if (!process) {
 364     jxbt_throw_notbound(env, "process", jprocess);
 365     return;
 366   }
 367
 368         MSG_process_kill(process);
 369 }
 370 JNIEXPORT void JNICALL
 371 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 372                                      jobject jprocess, jobject jhost)
 373 {
 374   msg_process_t process = jprocess_to_native_process(jprocess, env);
 375
 376   if (!process) {
 377     jxbt_throw_notbound(env, "process", jprocess);
 378     return;
 379   }
 380
 381   msg_host_t host = jhost_get_native(env, jhost);
 382
 383   if (!host) {
 384     jxbt_throw_notbound(env, "host", jhost);
 385     return;
 386   }
 387
 388   /* try to change the host of the process */
 389   msg_error_t rv = MSG_process_migrate(process, host);
 390   if (rv != MSG_OK) {
 391     jmsg_throw_status(env,rv);
 392   }
 393   /* change the host java side */
 394   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 395 }
 396 JNIEXPORT void JNICALL
 397 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 398         msg_process_t process = jprocess_to_native_process(jprocess, env);
 399         MSG_process_set_kill_time(process, (double)jkilltime);
 400 }
 401
 402 JNIEXPORT jint JNICALL
 403 Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
 404         /* FIXME: the next test on SimGrid version is to ensure that this still compiles with SG 3.8 while the C function were added in SG 3.9 only.
 405          * This kind of pimple becomes mandatory when you get so slow to release the java version that it begins evolving further after the C release date.
 406          */
 407 #if SIMGRID_VERSION >= 30900
 408   return (jint) MSG_process_get_number();
 409 #else
 410   return (jint) -1;
 411 #endif
 412 }