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
  15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
  16
  17 jobject native_to_java_process(m_process_t process)
  18 {
  19   return ((smx_ctx_java_t)MSG_process_get_smx_ctx(process))->jprocess;
  20 }
  21
  22 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
  23 {
  24   return (*env)->NewGlobalRef(env, jprocess);
  25 }
  26
  27 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
  28 {
  29   (*env)->DeleteGlobalRef(env, jprocess);
  30 }
  31
  32 void jprocess_join(jobject jprocess, JNIEnv * env)
  33 {
  34         m_process_t process = jprocess_to_native_process(jprocess,env);
  35         smx_ctx_java_t context = (smx_ctx_java_t)MSG_process_get_smx_ctx(process);
  36         xbt_os_thread_join(context->thread,NULL);
  37 }
  38
  39 m_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
  40 {
  41   return (m_process_t) (long) (*env)->GetLongField(env, jprocess, jprocess_field_Process_bind);
  42 }
  43
  44 void jprocess_bind(jobject jprocess, m_process_t process, JNIEnv * env)
  45 {
  46   (*env)->SetLongField(env, jprocess, jprocess_field_Process_bind, (jlong)(process));
  47 }
  48
  49 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
  50 {
  51   return (*env)->GetLongField(env, jprocess, jprocess_field_Process_id);
  52 }
  53
  54 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
  55 {
  56   jstring jname = (jstring) (*env)->GetObjectField(env, jprocess, jprocess_field_Process_name);
  57   return (*env)->NewGlobalRef(env, jname);
  58
  59 }
  60
  61 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
  62 {
  63   jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
  64
  65   if (!id)
  66     return JNI_FALSE;
  67
  68   return (*env)->GetLongField(env, jprocess, id) ? JNI_TRUE : JNI_FALSE;
  69 }
  70 JNIEXPORT void JNICALL
  71 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  72         jclass jprocess_class_Process = (*env)->FindClass(env, "org/simgrid/msg/Process");
  73
  74         jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  75         jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  76         jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
  77         jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
  78         jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
  79         jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
  80         jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
  81         if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
  82                         !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
  83         jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
  84         }
  85 }
  86 JNIEXPORT void JNICALL
  87 Java_org_simgrid_msg_Process_create(JNIEnv * env,
  88                                     jobject jprocess_arg,
  89                                     jobject jhostname)
  90 {
  91
  92
  93   jobject jprocess;             /* the global reference to the java process instance    */
  94   jstring jname;                /* the name of the java process instance                */
  95   const char *name;             /* the C name of the process                            */
  96   const char *hostname;
  97   m_process_t process;          /* the native process to create                         */
  98   m_host_t host;                /* Where that process lives */
  99
 100   hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
 101
 102   XBT_DEBUG("Java_org_simgrid_msg_MsgNative_processCreate(env=%p,jproc=%p,host=%s)",
 103          env, jprocess_arg, hostname);
 104
 105
 106   /* get the name of the java process */
 107   jname = jprocess_get_name(jprocess_arg, env);
 108   if (!jname) {
 109     jxbt_throw_null(env,
 110             xbt_strdup("Internal error: Process name cannot be NULL"));
 111     return;
 112   }
 113
 114   /* bind/retrieve the msg host */
 115   host = MSG_get_host_by_name(hostname);
 116
 117   if (!(host)) {    /* not binded */
 118     jxbt_throw_host_not_found(env, hostname);
 119     return;
 120   }
 121
 122   /* create a global java process instance */
 123   jprocess = jprocess_new_global_ref(jprocess_arg, env);
 124   if (!jprocess) {
 125     jxbt_throw_jni(env, "Can't get a global ref to the java process");
 126     return;
 127   }
 128
 129   /* build the C name of the process */
 130   name = (*env)->GetStringUTFChars(env, jname, 0);
 131   name = xbt_strdup(name);
 132
 133   /* Retrieve the kill time from the process */
 134   jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
 135   /* Actually build the MSG process */
 136   process = MSG_process_create_with_environment(name,
 137                                                 (xbt_main_func_t) jprocess,
 138                                                 /*data*/ jprocess,
 139                                                 host,
 140                                                 /*argc, argv, properties*/
 141                                                 0,NULL,NULL);
 142   MSG_process_set_kill_time(process, (double)jkill);
 143   MSG_process_set_data(process,&process);
 144   /* bind the java process instance to the native process */
 145   jprocess_bind(jprocess, process, env);
 146
 147   /* release our reference to the process name (variable name becomes invalid) */
 148   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 149   //(*env)->ReleaseStringUTFChars(env, jname, name);
 150   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 151
 152   /* sets the PID and the PPID of the process */
 153   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 154   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 155   /* sets the Host of the process */
 156   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 157
 158   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 159 }
 160
 161 JNIEXPORT jint JNICALL
 162 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 163                                      jint jresetPID)
 164 {
 165   return (jint) MSG_process_killall((int) jresetPID);
 166 }
 167
 168 JNIEXPORT jobject JNICALL
 169 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 170                                      jint PID)
 171 {
 172   m_process_t process = MSG_process_from_PID(PID);
 173
 174   if (!process) {
 175     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 176     return NULL;
 177   }
 178
 179   jobject jprocess = native_to_java_process(process);
 180
 181   if (!jprocess) {
 182     jxbt_throw_jni(env, "SIMIX_process_get_jprocess() failed");
 183     return NULL;
 184   }
 185
 186   return jprocess;
 187 }
 188
 189 JNIEXPORT jobject JNICALL
 190 Java_org_simgrid_msg_Process_currentProcess(JNIEnv * env, jclass cls)
 191 {
 192   m_process_t process = MSG_process_self();
 193   jobject jprocess;
 194
 195   if (!process) {
 196     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 197     return NULL;
 198   }
 199
 200   jprocess = native_to_java_process(process);
 201
 202   if (!jprocess)
 203     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 204
 205   return jprocess;
 206 }
 207
 208 JNIEXPORT void JNICALL
 209 Java_org_simgrid_msg_Process_pause(JNIEnv * env,
 210                                    jobject jprocess)
 211 {
 212   m_process_t process = jprocess_to_native_process(jprocess, env);
 213
 214   if (!process) {
 215     jxbt_throw_notbound(env, "process", jprocess);
 216     return;
 217   }
 218
 219   /* try to suspend the process */
 220   MSG_error_t rv = MSG_process_suspend(process);
 221
 222   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 223                  bprintf("unexpected error , please report this bug"));
 224
 225 }
 226 JNIEXPORT void JNICALL
 227 Java_org_simgrid_msg_Process_restart(JNIEnv * env,
 228                                      jobject jprocess)
 229 {
 230   m_process_t process = jprocess_to_native_process(jprocess, env);
 231
 232   if (!process) {
 233     jxbt_throw_notbound(env, "process", jprocess);
 234     return;
 235   }
 236
 237   /* try to resume the process */
 238   MSG_error_t rv = MSG_process_resume(process);
 239
 240   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 241                  bprintf("unexpected error , please report this bug"));
 242 }
 243 JNIEXPORT jboolean JNICALL
 244 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 245                                          jobject jprocess)
 246 {
 247   m_process_t process = jprocess_to_native_process(jprocess, env);
 248
 249   if (!process) {
 250     jxbt_throw_notbound(env, "process", jprocess);
 251     return 0;
 252   }
 253
 254   /* true is the process is suspended, false otherwise */
 255   return (jboolean) MSG_process_is_suspended(process);
 256 }
 257
 258 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep
 259         (JNIEnv *env, jclass cls, jlong jmillis, jint jnanos) {
 260
 261         double time =  jmillis / 1000 + jnanos / 1000;
 262         MSG_error_t rv;
 263         TRY {
 264                 rv = MSG_process_sleep(time);
 265         }
 266         CATCH_ANONYMOUS {
 267                 return;
 268         }
 269   if (rv != MSG_OK) {
 270         jmsg_throw_status(env,rv);
 271   }
 272 }
 273 JNIEXPORT void JNICALL
 274 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 275                                      jdouble jseconds)
 276 {
 277         MSG_error_t rv;
 278   TRY {
 279          rv = MSG_process_sleep((double)jseconds);
 280   }
 281   CATCH_ANONYMOUS {
 282         return;
 283   }
 284   if (rv != MSG_OK) {
 285         XBT_INFO("Status NOK");
 286         jmsg_throw_status(env,rv);
 287   }
 288 }
 289
 290 JNIEXPORT void JNICALL
 291 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 292                                   jobject jprocess)
 293 {
 294         /* get the native instances from the java ones */
 295   m_process_t process = jprocess_to_native_process(jprocess, env);
 296   if (!process) {
 297     jxbt_throw_notbound(env, "process", jprocess);
 298     return;
 299   }
 300
 301         MSG_process_kill(process);
 302 }
 303 JNIEXPORT void JNICALL
 304 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 305                                      jobject jprocess, jobject jhost)
 306 {
 307   m_process_t process = jprocess_to_native_process(jprocess, env);
 308
 309   if (!process) {
 310     jxbt_throw_notbound(env, "process", jprocess);
 311     return;
 312   }
 313
 314   m_host_t host = jhost_get_native(env, jhost);
 315
 316   if (!host) {
 317     jxbt_throw_notbound(env, "host", jhost);
 318     return;
 319   }
 320
 321   /* try to change the host of the process */
 322   MSG_error_t rv = MSG_process_migrate(process, host);
 323   jxbt_check_res("MSG_process_migrate()", rv, MSG_OK,
 324                  bprintf("unexpected error , please report this bug"));
 325   /* change the host java side */
 326   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 327 }
 328 JNIEXPORT void JNICALL
 329 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 330         m_process_t process = jprocess_to_native_process(jprocess, env);
 331         MSG_process_set_kill_time(process, (double)jkilltime);
 332 }