src/jmsg_process.c

   1 /* Functions related to the java process instances.                         */
   2
   3 /* Copyright (c) 2007, 2008, 2009, 2010. 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 JNIEXPORT void JNICALL
  19 Java_org_simgrid_msg_Process_exit(JNIEnv *env, jobject jprocess) {
  20         if (smx_factory_initializer_to_use == SIMIX_ctx_cojava_factory_init) {
  21                 m_process_t process = jprocess_to_native_process(jprocess, env);
  22                 smx_context_t context = MSG_process_get_smx_ctx(process);
  23                 smx_ctx_cojava_stop(context);
  24         }
  25 }
  26
  27 jobject native_to_java_process(m_process_t process)
  28 {
  29   return ((smx_ctx_java_t)MSG_process_get_smx_ctx(process))->jprocess;
  30 }
  31
  32 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
  33 {
  34   return (*env)->NewGlobalRef(env, jprocess);
  35 }
  36
  37 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
  38 {
  39   (*env)->DeleteGlobalRef(env, jprocess);
  40 }
  41
  42 void jprocess_join(jobject jprocess, JNIEnv * env)
  43 {
  44         m_process_t process = jprocess_to_native_process(jprocess,env);
  45         smx_ctx_java_t context = (smx_ctx_java_t)MSG_process_get_smx_ctx(process);
  46         xbt_os_thread_join(context->thread,NULL);
  47 }
  48
  49 m_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
  50 {
  51   return (m_process_t) (long) (*env)->GetLongField(env, jprocess, jprocess_field_Process_bind);
  52 }
  53
  54 void jprocess_bind(jobject jprocess, m_process_t process, JNIEnv * env)
  55 {
  56   (*env)->SetLongField(env, jprocess, jprocess_field_Process_bind, (jlong)(process));
  57 }
  58
  59 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
  60 {
  61   return (*env)->GetLongField(env, jprocess, jprocess_field_Process_id);
  62 }
  63
  64 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
  65 {
  66   jstring jname = (jstring) (*env)->GetObjectField(env, jprocess, jprocess_field_Process_name);
  67   return (*env)->NewGlobalRef(env, jname);
  68
  69 }
  70
  71 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
  72 {
  73   jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
  74
  75   if (!id)
  76     return JNI_FALSE;
  77
  78   return (*env)->GetLongField(env, jprocess, id) ? JNI_TRUE : JNI_FALSE;
  79 }
  80 JNIEXPORT void JNICALL
  81 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  82         jclass jprocess_class_Process = (*env)->FindClass(env, "org/simgrid/msg/Process");
  83
  84         jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  85         jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  86         jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
  87         jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
  88         jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
  89         jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
  90         jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
  91         if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
  92                         !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
  93         jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
  94         }
  95 }
  96 JNIEXPORT void JNICALL
  97 Java_org_simgrid_msg_Process_create(JNIEnv * env,
  98                                     jobject jprocess_arg,
  99                                     jobject jhostname)
 100 {
 101
 102
 103   jobject jprocess;             /* the global reference to the java process instance    */
 104   jstring jname;                /* the name of the java process instance                */
 105   const char *name;             /* the C name of the process                            */
 106   const char *hostname;
 107   m_process_t process;          /* the native process to create                         */
 108   m_host_t host;                /* Where that process lives */
 109
 110   hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
 111
 112   XBT_DEBUG("Java_org_simgrid_msg_MsgNative_processCreate(env=%p,jproc=%p,host=%s)",
 113          env, jprocess_arg, hostname);
 114
 115
 116   /* get the name of the java process */
 117   jname = jprocess_get_name(jprocess_arg, env);
 118   if (!jname) {
 119     jxbt_throw_null(env,
 120             xbt_strdup("Internal error: Process name cannot be NULL"));
 121     return;
 122   }
 123
 124   /* bind/retrieve the msg host */
 125   host = MSG_get_host_by_name(hostname);
 126
 127   if (!(host)) {    /* not binded */
 128     jxbt_throw_host_not_found(env, hostname);
 129     return;
 130   }
 131
 132   /* create a global java process instance */
 133   jprocess = jprocess_new_global_ref(jprocess_arg, env);
 134   if (!jprocess) {
 135     jxbt_throw_jni(env, "Can't get a global ref to the java process");
 136     return;
 137   }
 138
 139   /* build the C name of the process */
 140   name = (*env)->GetStringUTFChars(env, jname, 0);
 141   name = xbt_strdup(name);
 142
 143   /* Retrieve the kill time from the process */
 144   jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
 145   /* Actually build the MSG process */
 146   process = MSG_process_create_with_environment(name,
 147                                                 (xbt_main_func_t) jprocess,
 148                                                 /*data*/ jprocess,
 149                                                 host,
 150                                                 /*argc, argv, properties*/
 151                                                 0,NULL,NULL);
 152   MSG_process_set_kill_time(process, (double)jkill);
 153   MSG_process_set_data(process,&process);
 154   /* bind the java process instance to the native process */
 155   jprocess_bind(jprocess, process, env);
 156
 157   /* release our reference to the process name (variable name becomes invalid) */
 158   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 159   //(*env)->ReleaseStringUTFChars(env, jname, name);
 160   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 161
 162   /* sets the PID and the PPID of the process */
 163   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 164   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 165   /* sets the Host of the process */
 166   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 167
 168   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 169 }
 170
 171 JNIEXPORT jint JNICALL
 172 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 173                                      jint jresetPID)
 174 {
 175   return (jint) MSG_process_killall((int) jresetPID);
 176 }
 177
 178 JNIEXPORT jobject JNICALL
 179 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 180                                      jint PID)
 181 {
 182   m_process_t process = MSG_process_from_PID(PID);
 183
 184   if (!process) {
 185     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 186     return NULL;
 187   }
 188
 189   jobject jprocess = native_to_java_process(process);
 190
 191   if (!jprocess) {
 192     jxbt_throw_jni(env, "SIMIX_process_get_jprocess() failed");
 193     return NULL;
 194   }
 195
 196   return jprocess;
 197 }
 198
 199 JNIEXPORT jobject JNICALL
 200 Java_org_simgrid_msg_Process_currentProcess(JNIEnv * env, jclass cls)
 201 {
 202   m_process_t process = MSG_process_self();
 203   jobject jprocess;
 204
 205   if (!process) {
 206     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 207     return NULL;
 208   }
 209
 210   jprocess = native_to_java_process(process);
 211
 212   if (!jprocess)
 213     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 214
 215   return jprocess;
 216 }
 217
 218 JNIEXPORT void JNICALL
 219 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
 220                                    jobject jprocess)
 221 {
 222   m_process_t process = jprocess_to_native_process(jprocess, env);
 223
 224   if (!process) {
 225     jxbt_throw_notbound(env, "process", jprocess);
 226     return;
 227   }
 228
 229   /* try to suspend the process */
 230   MSG_error_t rv = MSG_process_suspend(process);
 231
 232   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 233                  bprintf("unexpected error , please report this bug"));
 234
 235 }
 236 JNIEXPORT void JNICALL
 237 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
 238                                      jobject jprocess)
 239 {
 240   m_process_t process = jprocess_to_native_process(jprocess, env);
 241
 242   if (!process) {
 243     jxbt_throw_notbound(env, "process", jprocess);
 244     return;
 245   }
 246
 247   /* try to resume the process */
 248   MSG_error_t rv = MSG_process_resume(process);
 249
 250   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 251                  bprintf("unexpected error , please report this bug"));
 252 }
 253 JNIEXPORT jboolean JNICALL
 254 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 255                                          jobject jprocess)
 256 {
 257   m_process_t process = jprocess_to_native_process(jprocess, env);
 258
 259   if (!process) {
 260     jxbt_throw_notbound(env, "process", jprocess);
 261     return 0;
 262   }
 263
 264   /* true is the process is suspended, false otherwise */
 265   return (jboolean) MSG_process_is_suspended(process);
 266 }
 267
 268 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep
 269         (JNIEnv *env, jclass cls, jlong jmillis, jint jnanos) {
 270
 271         double time =  jmillis / 1000 + jnanos / 1000;
 272         MSG_error_t rv;
 273         TRY {
 274                 rv = MSG_process_sleep(time);
 275         }
 276         CATCH_ANONYMOUS {
 277                 return;
 278         }
 279   if (rv != MSG_OK) {
 280         jmsg_throw_status(env,rv);
 281   }
 282 }
 283 JNIEXPORT void JNICALL
 284 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 285                                      jdouble jseconds)
 286 {
 287         MSG_error_t rv;
 288   TRY {
 289          rv = MSG_process_sleep((double)jseconds);
 290   }
 291   CATCH_ANONYMOUS {
 292         return;
 293   }
 294   if (rv != MSG_OK) {
 295         XBT_INFO("Status NOK");
 296         jmsg_throw_status(env,rv);
 297   }
 298 }
 299
 300 JNIEXPORT void JNICALL
 301 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 302                                   jobject jprocess)
 303 {
 304         /* get the native instances from the java ones */
 305   m_process_t process = jprocess_to_native_process(jprocess, env);
 306   if (!process) {
 307     jxbt_throw_notbound(env, "process", jprocess);
 308     return;
 309   }
 310
 311         MSG_process_kill(process);
 312 }
 313 JNIEXPORT void JNICALL
 314 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 315                                      jobject jprocess, jobject jhost)
 316 {
 317   m_process_t process = jprocess_to_native_process(jprocess, env);
 318
 319   if (!process) {
 320     jxbt_throw_notbound(env, "process", jprocess);
 321     return;
 322   }
 323
 324   m_host_t host = jhost_get_native(env, jhost);
 325
 326   if (!host) {
 327     jxbt_throw_notbound(env, "host", jhost);
 328     return;
 329   }
 330
 331   /* try to change the host of the process */
 332   MSG_error_t rv = MSG_process_migrate(process, host);
 333   jxbt_check_res("MSG_process_migrate()", rv, MSG_OK,
 334                  bprintf("unexpected error , please report this bug"));
 335   /* change the host java side */
 336   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 337 }
 338 JNIEXPORT void JNICALL
 339 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 340         m_process_t process = jprocess_to_native_process(jprocess, env);
 341         MSG_process_set_kill_time(process, (double)jkilltime);
 342 }