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