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) (long) (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                                                 (double)jkill, /* kill time */
 141                                                 /*argc, argv, properties*/
 142                                                 0,NULL,NULL);
 143
 144   MSG_process_set_data(process,&process);
 145   /* bind the java process instance to the native process */
 146   jprocess_bind(jprocess, process, env);
 147
 148   /* release our reference to the process name (variable name becomes invalid) */
 149   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 150   //(*env)->ReleaseStringUTFChars(env, jname, name);
 151   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 152
 153   /* sets the PID and the PPID of the process */
 154   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 155   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 156   /* sets the Host of the process */
 157   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 158
 159   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 160 }
 161
 162 JNIEXPORT jint JNICALL
 163 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 164                                      jint jresetPID)
 165 {
 166   return (jint) MSG_process_killall((int) jresetPID);
 167 }
 168
 169 JNIEXPORT jobject JNICALL
 170 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 171                                      jint PID)
 172 {
 173   m_process_t process = MSG_process_from_PID(PID);
 174
 175   if (!process) {
 176     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 177     return NULL;
 178   }
 179
 180   jobject jprocess = native_to_java_process(process);
 181
 182   if (!jprocess) {
 183     jxbt_throw_jni(env, "SIMIX_process_get_jprocess() failed");
 184     return NULL;
 185   }
 186
 187   return jprocess;
 188 }
 189
 190 JNIEXPORT jobject JNICALL
 191 Java_org_simgrid_msg_Process_currentProcess(JNIEnv * env, jclass cls)
 192 {
 193   m_process_t process = MSG_process_self();
 194   jobject jprocess;
 195
 196   if (!process) {
 197     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 198     return NULL;
 199   }
 200
 201   jprocess = native_to_java_process(process);
 202
 203   if (!jprocess)
 204     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 205
 206   return jprocess;
 207 }
 208
 209 JNIEXPORT void JNICALL
 210 Java_org_simgrid_msg_Process_pause(JNIEnv * env,
 211                                    jobject jprocess)
 212 {
 213   m_process_t process = jprocess_to_native_process(jprocess, env);
 214
 215   if (!process) {
 216     jxbt_throw_notbound(env, "process", jprocess);
 217     return;
 218   }
 219
 220   /* try to suspend the process */
 221   MSG_error_t rv = MSG_process_suspend(process);
 222
 223   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 224                  bprintf("unexpected error , please report this bug"));
 225
 226 }
 227 JNIEXPORT void JNICALL
 228 Java_org_simgrid_msg_Process_restart(JNIEnv * env,
 229                                      jobject jprocess)
 230 {
 231   m_process_t process = jprocess_to_native_process(jprocess, env);
 232
 233   if (!process) {
 234     jxbt_throw_notbound(env, "process", jprocess);
 235     return;
 236   }
 237
 238   /* try to resume the process */
 239   MSG_error_t rv = MSG_process_resume(process);
 240
 241   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 242                  bprintf("unexpected error , please report this bug"));
 243 }
 244 JNIEXPORT jboolean JNICALL
 245 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 246                                          jobject jprocess)
 247 {
 248   m_process_t process = jprocess_to_native_process(jprocess, env);
 249
 250   if (!process) {
 251     jxbt_throw_notbound(env, "process", jprocess);
 252     return 0;
 253   }
 254
 255   /* true is the process is suspended, false otherwise */
 256   return (jboolean) MSG_process_is_suspended(process);
 257 }
 258
 259 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep
 260         (JNIEnv *env, jclass cls, jlong jmillis, jint jnanos) {
 261
 262         double time =  jmillis / 1000 + jnanos / 1000;
 263         MSG_error_t rv;
 264         TRY {
 265                 rv = MSG_process_sleep(time);
 266         }
 267         CATCH_ANONYMOUS {
 268                 return;
 269         }
 270         jxbt_check_res("MSG_process_sleep()", rv, MSG_OK,
 271                  bprintf("unexpected error , please report this bug"));
 272 }
 273 JNIEXPORT void JNICALL
 274 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 275                                      jdouble jseconds)
 276 {
 277   m_process_t process = jprocess_to_native_process(jprocess, env);
 278
 279   if (!process) {
 280     jxbt_throw_notbound(env, "process", jprocess);
 281     return;
 282   }
 283   MSG_error_t rv;
 284   TRY {
 285          rv = MSG_process_sleep((double)jseconds);
 286   }
 287   CATCH_ANONYMOUS {
 288         return;
 289   }
 290   if (rv != MSG_OK) {
 291 //      smx_ctx_java_stop(smx_ctx_java_self());
 292   }
 293 }
 294
 295 JNIEXPORT void JNICALL
 296 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 297                                   jobject jprocess)
 298 {
 299         /* get the native instances from the java ones */
 300   m_process_t process = jprocess_to_native_process(jprocess, env);
 301   if (!process) {
 302     jxbt_throw_notbound(env, "process", jprocess);
 303     return;
 304   }
 305
 306         MSG_process_kill(process);
 307 }
 308 JNIEXPORT void JNICALL
 309 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 310                                      jobject jprocess, jobject jhost)
 311 {
 312   m_process_t process = jprocess_to_native_process(jprocess, env);
 313
 314   if (!process) {
 315     jxbt_throw_notbound(env, "process", jprocess);
 316     return;
 317   }
 318
 319   m_host_t host = jhost_get_native(env, jhost);
 320
 321   if (!host) {
 322     jxbt_throw_notbound(env, "host", jhost);
 323     return;
 324   }
 325
 326   /* try to change the host of the process */
 327   MSG_error_t rv = MSG_process_migrate(process, host);
 328   jxbt_check_res("MSG_process_migrate()", rv, MSG_OK,
 329                  bprintf("unexpected error , please report this bug"));
 330   /* change the host java side */
 331   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 332 }