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   /* bind the java process instance to the native process */
 154   jprocess_bind(jprocess, process, env);
 155
 156   /* release our reference to the process name (variable name becomes invalid) */
 157   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 158   //(*env)->ReleaseStringUTFChars(env, jname, name);
 159   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 160
 161   /* sets the PID and the PPID of the process */
 162   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 163   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 164   /* sets the Host of the process */
 165   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 166
 167   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 168 }
 169
 170 JNIEXPORT jint JNICALL
 171 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 172                                      jint jresetPID)
 173 {
 174   return (jint) MSG_process_killall((int) jresetPID);
 175 }
 176
 177 JNIEXPORT jobject JNICALL
 178 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 179                                      jint PID)
 180 {
 181   m_process_t process = MSG_process_from_PID(PID);
 182
 183   if (!process) {
 184     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 185     return NULL;
 186   }
 187
 188   jobject jprocess = native_to_java_process(process);
 189
 190   if (!jprocess) {
 191     jxbt_throw_jni(env, "SIMIX_process_get_jprocess() failed");
 192     return NULL;
 193   }
 194
 195   return jprocess;
 196 }
 197
 198 JNIEXPORT jobject JNICALL
 199 Java_org_simgrid_msg_Process_currentProcess(JNIEnv * env, jclass cls)
 200 {
 201   m_process_t process = MSG_process_self();
 202   jobject jprocess;
 203
 204   if (!process) {
 205     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 206     return NULL;
 207   }
 208
 209   jprocess = native_to_java_process(process);
 210
 211   if (!jprocess)
 212     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 213
 214   return jprocess;
 215 }
 216
 217 JNIEXPORT void JNICALL
 218 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
 219                                    jobject jprocess)
 220 {
 221   m_process_t process = jprocess_to_native_process(jprocess, env);
 222
 223   if (!process) {
 224     jxbt_throw_notbound(env, "process", jprocess);
 225     return;
 226   }
 227
 228   /* try to suspend the process */
 229   MSG_error_t rv = MSG_process_suspend(process);
 230
 231   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 232                  bprintf("unexpected error , please report this bug"));
 233
 234 }
 235 JNIEXPORT void JNICALL
 236 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
 237                                      jobject jprocess)
 238 {
 239   m_process_t process = jprocess_to_native_process(jprocess, env);
 240
 241   if (!process) {
 242     jxbt_throw_notbound(env, "process", jprocess);
 243     return;
 244   }
 245
 246   /* try to resume the process */
 247   MSG_error_t rv = MSG_process_resume(process);
 248
 249   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 250                  bprintf("unexpected error , please report this bug"));
 251 }
 252 JNIEXPORT jboolean JNICALL
 253 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 254                                          jobject jprocess)
 255 {
 256   m_process_t process = jprocess_to_native_process(jprocess, env);
 257
 258   if (!process) {
 259     jxbt_throw_notbound(env, "process", jprocess);
 260     return 0;
 261   }
 262
 263   /* true is the process is suspended, false otherwise */
 264   return (jboolean) MSG_process_is_suspended(process);
 265 }
 266
 267 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep
 268         (JNIEnv *env, jclass cls, jlong jmillis, jint jnanos) {
 269
 270         double time =  jmillis / 1000 + jnanos / 1000;
 271         MSG_error_t rv;
 272         TRY {
 273                 rv = MSG_process_sleep(time);
 274         }
 275         CATCH_ANONYMOUS {
 276                 return;
 277         }
 278   if (rv != MSG_OK) {
 279         jmsg_throw_status(env,rv);
 280   }
 281 }
 282 JNIEXPORT void JNICALL
 283 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 284                                      jdouble jseconds)
 285 {
 286         MSG_error_t rv;
 287   TRY {
 288          rv = MSG_process_sleep((double)jseconds);
 289   }
 290   CATCH_ANONYMOUS {
 291         return;
 292   }
 293   if (rv != MSG_OK) {
 294         XBT_INFO("Status NOK");
 295         jmsg_throw_status(env,rv);
 296   }
 297 }
 298
 299 JNIEXPORT void JNICALL
 300 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 301                                   jobject jprocess)
 302 {
 303         /* get the native instances from the java ones */
 304   m_process_t process = jprocess_to_native_process(jprocess, env);
 305   if (!process) {
 306     jxbt_throw_notbound(env, "process", jprocess);
 307     return;
 308   }
 309
 310         MSG_process_kill(process);
 311 }
 312 JNIEXPORT void JNICALL
 313 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 314                                      jobject jprocess, jobject jhost)
 315 {
 316   m_process_t process = jprocess_to_native_process(jprocess, env);
 317
 318   if (!process) {
 319     jxbt_throw_notbound(env, "process", jprocess);
 320     return;
 321   }
 322
 323   m_host_t host = jhost_get_native(env, jhost);
 324
 325   if (!host) {
 326     jxbt_throw_notbound(env, "host", jhost);
 327     return;
 328   }
 329
 330   /* try to change the host of the process */
 331   MSG_error_t rv = MSG_process_migrate(process, host);
 332   jxbt_check_res("MSG_process_migrate()", rv, MSG_OK,
 333                  bprintf("unexpected error , please report this bug"));
 334   /* change the host java side */
 335   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 336 }
 337 JNIEXPORT void JNICALL
 338 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 339         m_process_t process = jprocess_to_native_process(jprocess, env);
 340         MSG_process_set_kill_time(process, (double)jkilltime);
 341 }