JNIEXPORT jobject JNICALL
Java_org_simgrid_msg_Host_getByName(JNIEnv * env, jclass cls,
jstring jname) {
msg_host_t host; /* native host */
jobject jhost; /* global reference to the java host instance returned */
/* get the C string from the java string */
const char *name = (*env)->GetStringUTFChars(env, jname, 0);
if (name == NULL) {
jxbt_throw_null(env,bprintf("No host can have a null name"));
return NULL;
}
/* get the host by name (the hosts are created during the grid resolution) */
host = MSG_get_host_by_name(name);
if (!host) { /* invalid name */
jxbt_throw_host_not_found(env, name);
(*env)->ReleaseStringUTFChars(env, jname, name);
return NULL;
}
(*env)->ReleaseStringUTFChars(env, jname, name);
if (!MSG_host_get_data(host)) { /* native host not associated yet with java host */
/* Instantiate a new java host */
jhost = jhost_new_instance(env);
if (!jhost) {
jxbt_throw_jni(env, "java host instantiation failed");
return NULL;
}
/* get a global reference to the newly created host */
jhost = jhost_ref(env, jhost);
if (!jhost) {
jxbt_throw_jni(env, "new global ref allocation failed");
return NULL;
}
/* Sets the java host name */
(*env)->SetObjectField(env, jhost, jhost_field_Host_name, jname);
/* bind the java host and the native host */
jhost_bind(jhost, host, env);
/* the native host data field is set with the global reference to the
* java host returned by this function
*/
MSG_host_set_data(host, (void *) jhost);
}
/* return the global reference to the java host instance */
return (jobject) MSG_host_get_data(host);
}
JNIEXPORT void JNICALL
Java_org_simgrid_msg_Process_create(JNIEnv * env,
jobject jprocess_arg,
jobject jhostname)
{
jobject jprocess; /* the global reference to the java process instance */
jstring jname; /* the name of the java process instance */
const char *name; /* the C name of the process */
const char *hostname;
msg_process_t process; /* the native process to create */
msg_host_t host; /* Where that process lives */
hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
/* get the name of the java process */
jname = jprocess_get_name(jprocess_arg, env);
if (!jname) {
jxbt_throw_null(env,
xbt_strdup("Internal error: Process name cannot be NULL"));
return;
}
/* bind/retrieve the msg host */
host = MSG_host_by_name(hostname);
if (!(host)) { /* not bound */
jxbt_throw_host_not_found(env, hostname);
return;
}
/* create a global java process instance */
jprocess = jprocess_new_global_ref(jprocess_arg, env);
if (!jprocess) {
jxbt_throw_jni(env, "Can't get a global ref to the java process");
return;
}
/* build the C name of the process */
name = (*env)->GetStringUTFChars(env, jname, 0);
name = xbt_strdup(name);
/* Retrieve the kill time from the process */
jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
/* Actually build the MSG process */
process = MSG_process_create_with_environment(name,
(xbt_main_func_t) jprocess,
/*data*/ jprocess,
host,
/*argc, argv, properties*/
0,NULL,NULL);
MSG_process_set_kill_time(process, (double)jkill);
/* bind the java process instance to the native process */
jprocess_bind(jprocess, process, env);
/* release our reference to the process name (variable name becomes invalid) */
//FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
//(*env)->ReleaseStringUTFChars(env, jname, name);
(*env)->ReleaseStringUTFChars(env, jhostname, hostname);
/* sets the PID and the PPID of the process */
(*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
(*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
/* sets the Host of the process */
jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
(*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
}
