1 /* Functions related to the java host instances. */
3 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "simgrid/Exception.hpp"
9 #include "simgrid/plugins/energy.h"
10 #include "simgrid/plugins/load.h"
11 #include "simgrid/s4u/Host.hpp"
12 #include "simgrid/s4u/Storage.hpp"
14 #include "JavaContext.hpp"
16 #include "jmsg_host.h"
17 #include "jmsg_storage.h"
18 #include "jxbt_utilities.hpp"
20 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
22 static jmethodID jhost_method_Host_constructor;
23 static jfieldID jhost_field_Host_bind;
24 static jfieldID jhost_field_Host_name;
26 jobject jhost_new_instance(JNIEnv * env) {
27 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
28 return env->NewObject(cls, jhost_method_Host_constructor);
31 jobject jhost_ref(JNIEnv * env, jobject jhost) {
32 return env->NewGlobalRef(jhost);
35 void jhost_unref(JNIEnv * env, jobject jhost) {
36 env->DeleteGlobalRef(jhost);
39 void jhost_bind(jobject jhost, msg_host_t host, JNIEnv * env) {
40 env->SetLongField(jhost, jhost_field_Host_bind, (jlong) (uintptr_t) (host));
43 msg_host_t jhost_get_native(JNIEnv * env, jobject jhost) {
44 return (msg_host_t) (uintptr_t) env->GetLongField(jhost, jhost_field_Host_bind);
47 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_nativeInit(JNIEnv *env, jclass cls) {
48 jclass class_Host = env->FindClass("org/simgrid/msg/Host");
49 jhost_method_Host_constructor = env->GetMethodID(class_Host, "<init>", "()V");
50 jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
51 jhost_field_Host_name = jxbt_get_jfield(env, class_Host, "name", "Ljava/lang/String;");
52 xbt_assert(class_Host && jhost_field_Host_name && jhost_method_Host_constructor && jhost_field_Host_bind,
53 "Native initialization of msg/Host failed. Please report that bug");
56 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getByName(JNIEnv * env, jclass cls, jstring jname) {
58 /* get the C string from the java string */
59 if (jname == nullptr) {
60 jxbt_throw_null(env, "No host can have a null name");
63 const char *name = env->GetStringUTFChars(jname, 0);
64 /* get the host by name (the hosts are created during the grid resolution) */
65 msg_host_t host = MSG_host_by_name(name);
67 if (not host) { /* invalid name */
68 jxbt_throw_host_not_found(env, name);
69 env->ReleaseStringUTFChars(jname, name);
72 env->ReleaseStringUTFChars(jname, name);
74 if (not host->extension(JAVA_HOST_LEVEL)) { /* native host not associated yet with java host */
75 /* Instantiate a new java host */
76 jobject jhost = jhost_new_instance(env);
79 jxbt_throw_jni(env, "java host instantiation failed");
83 /* get a global reference to the newly created host */
84 jhost = jhost_ref(env, jhost);
87 jxbt_throw_jni(env, "new global ref allocation failed");
90 /* Sets the java host name */
91 env->SetObjectField(jhost, jhost_field_Host_name, jname);
92 /* bind the java host and the native host */
93 jhost_bind(jhost, host, env);
95 /* the native host data field is set with the global reference to the java host returned by this function */
96 host->extension_set(JAVA_HOST_LEVEL, (void *)jhost);
99 /* return the global reference to the java host instance */
100 return (jobject) host->extension(JAVA_HOST_LEVEL);
103 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
106 msg_host_t host = MSG_host_self();
108 if (not host->extension(JAVA_HOST_LEVEL)) {
109 /* the native host not yet associated with the java host instance */
111 /* instantiate a new java host instance */
112 jhost = jhost_new_instance(env);
115 jxbt_throw_jni(env, "java host instantiation failed");
119 /* get a global reference to the newly created host */
120 jhost = jhost_ref(env, jhost);
123 jxbt_throw_jni(env, "global ref allocation failed");
126 /* Sets the host name */
127 jobject jname = env->NewStringUTF(host->get_cname());
128 env->SetObjectField(jhost, jhost_field_Host_name, jname);
129 /* Bind & store it */
130 jhost_bind(jhost, host, env);
131 host->extension_set(JAVA_HOST_LEVEL, (void *) jhost);
133 jhost = (jobject) host->extension(JAVA_HOST_LEVEL);
139 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_on(JNIEnv *env, jobject jhost) {
140 msg_host_t host = jhost_get_native(env, jhost);
144 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_off(JNIEnv *env, jobject jhost) {
145 msg_host_t host = jhost_get_native(env, jhost);
146 if (not simgrid::ForcefulKillException::try_n_catch([host]() { MSG_host_off(host); }))
147 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Host turned off");
150 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
151 xbt_dynar_t hosts = MSG_hosts_as_dynar();
152 int nb_host = xbt_dynar_length(hosts);
153 xbt_dynar_free(&hosts);
154 return (jint) nb_host;
157 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env, jobject jhost) {
158 msg_host_t host = jhost_get_native(env, jhost);
161 jxbt_throw_notbound(env, "host", jhost);
165 return (jdouble) MSG_host_get_speed(host);
168 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCoreNumber(JNIEnv * env, jobject jhost) {
169 msg_host_t host = jhost_get_native(env, jhost);
172 jxbt_throw_notbound(env, "host", jhost);
176 return (jdouble) MSG_host_get_core_number(host);
179 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getProperty(JNIEnv *env, jobject jhost, jobject jname) {
180 msg_host_t host = jhost_get_native(env, jhost);
183 jxbt_throw_notbound(env, "host", jhost);
186 const char *name = env->GetStringUTFChars((jstring) jname, 0);
188 const char *property = MSG_host_get_property_value(host, name);
193 jobject jproperty = env->NewStringUTF(property);
195 env->ReleaseStringUTFChars((jstring) jname, name);
200 JNIEXPORT void JNICALL
201 Java_org_simgrid_msg_Host_setProperty(JNIEnv *env, jobject jhost, jobject jname, jobject jvalue) {
202 msg_host_t host = jhost_get_native(env, jhost);
205 jxbt_throw_notbound(env, "host", jhost);
208 const char *name = env->GetStringUTFChars((jstring) jname, 0);
209 const char *value_java = env->GetStringUTFChars((jstring) jvalue, 0);
210 char *value = xbt_strdup(value_java);
212 MSG_host_set_property_value(host, name, value);
214 env->ReleaseStringUTFChars((jstring) jvalue, value_java);
215 env->ReleaseStringUTFChars((jstring) jname, name);
218 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Host_isOn(JNIEnv * env, jobject jhost)
220 msg_host_t host = jhost_get_native(env, jhost);
223 jxbt_throw_notbound(env, "host", jhost);
227 return (jboolean) MSG_host_is_on(host);
230 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getMountedStorage(JNIEnv * env, jobject jhost)
232 msg_host_t host = jhost_get_native(env, jhost);
237 jxbt_throw_notbound(env, "host", jhost);
243 std::unordered_map<std::string, msg_storage_t> mounted_storages = host->get_mounted_storages();
244 int count = mounted_storages.size();
245 jclass cls = env->FindClass("org/simgrid/msg/Storage");
247 jtable = env->NewObjectArray((jsize) count, cls, nullptr);
250 jxbt_throw_jni(env, "Storages table allocation failed");
254 for (auto const& elm : mounted_storages) {
255 jname = env->NewStringUTF(elm.second->get_cname());
256 jstorage = Java_org_simgrid_msg_Storage_getByName(env,cls,jname);
257 env->SetObjectArrayElement(jtable, index, jstorage);
263 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getAttachedStorage(JNIEnv * env, jobject jhost)
265 msg_host_t host = jhost_get_native(env, jhost);
268 jxbt_throw_notbound(env, "host", jhost);
273 xbt_dynar_t dyn = sg_host_get_attached_storage_list(host);
274 jclass cls = jxbt_get_class(env, "java/lang/String");
275 jtable = env->NewObjectArray(static_cast<jsize>(xbt_dynar_length(dyn)), cls, nullptr);
277 const char* storage_name;
278 jstring jstorage_name;
279 xbt_dynar_foreach (dyn, index, storage_name) {
280 jstorage_name = env->NewStringUTF(storage_name);
281 env->SetObjectArrayElement(jtable, index, jstorage_name);
283 xbt_dynar_free_container(&dyn);
287 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getStorageContent(JNIEnv * env, jobject jhost)
289 msg_host_t host = jhost_get_native(env, jhost);
292 jxbt_throw_notbound(env, "host", jhost);
295 return (jobjectArray)MSG_host_get_storage_content(host);
298 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
301 xbt_dynar_t table = MSG_hosts_as_dynar();
302 int count = xbt_dynar_length(table);
304 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
308 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
311 jxbt_throw_jni(env, "Hosts table allocation failed");
315 for (int index = 0; index < count; index++) {
316 msg_host_t host = xbt_dynar_get_as(table, index, msg_host_t);
317 jobject jhost = static_cast<jobject>(host->extension(JAVA_HOST_LEVEL));
320 jstring jname = env->NewStringUTF(host->get_cname());
321 jhost = Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
324 env->SetObjectArrayElement(jtable, index, jhost);
326 xbt_dynar_free(&table);
330 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setAsyncMailbox(JNIEnv * env, jclass cls_arg, jobject jname)
332 const char *name = env->GetStringUTFChars((jstring) jname, 0);
333 sg_mailbox_set_receiver(name);
334 env->ReleaseStringUTFChars((jstring) jname, name);
337 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_updateAllEnergyConsumptions(JNIEnv* env, jclass cls)
339 sg_host_energy_update_all();
342 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getConsumedEnergy (JNIEnv *env, jobject jhost)
344 msg_host_t host = jhost_get_native(env, jhost);
347 jxbt_throw_notbound(env, "host", jhost);
351 return MSG_host_get_consumed_energy(host);
354 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setPstate(JNIEnv* env, jobject jhost, jint pstate)
356 msg_host_t host = jhost_get_native(env, jhost);
357 MSG_host_set_pstate(host, pstate);
359 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstate(JNIEnv* env, jobject jhost)
361 msg_host_t host = jhost_get_native(env, jhost);
362 return MSG_host_get_pstate(host);
364 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstatesCount(JNIEnv* env, jobject jhost)
366 msg_host_t host = jhost_get_native(env, jhost);
367 return MSG_host_get_nb_pstates(host);
369 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentPowerPeak(JNIEnv* env, jobject jhost)
371 msg_host_t host = jhost_get_native(env, jhost);
372 return MSG_host_get_speed(host);
374 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getPowerPeakAt(JNIEnv* env, jobject jhost, jint pstate)
376 msg_host_t host = jhost_get_native(env, jhost);
377 return MSG_host_get_power_peak_at(host, pstate);
380 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getLoad(JNIEnv* env, jobject jhost)
382 msg_host_t host = jhost_get_native(env, jhost);
383 return MSG_host_get_load(host);
386 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentLoad (JNIEnv *env, jobject jhost)
388 msg_host_t host = jhost_get_native(env, jhost);
391 jxbt_throw_notbound(env, "host", jhost);
395 return MSG_host_get_current_load(host);
398 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getComputedFlops (JNIEnv *env, jobject jhost)
400 msg_host_t host = jhost_get_native(env, jhost);
403 jxbt_throw_notbound(env, "host", jhost);
407 return MSG_host_get_computed_flops(host);
410 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getAvgLoad (JNIEnv *env, jobject jhost)
412 msg_host_t host = jhost_get_native(env, jhost);
415 jxbt_throw_notbound(env, "host", jhost);
419 return MSG_host_get_avg_load(host);