1 /* Functions related to the java host instances. */
3 /* Copyright (c) 2007-2021. 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"
13 #include "JavaContext.hpp"
15 #include "jmsg_host.h"
16 #include "jxbt_utilities.hpp"
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
20 static jmethodID jhost_method_Host_constructor;
21 static jfieldID jhost_field_Host_bind;
22 static jfieldID jhost_field_Host_name;
24 jobject jhost_new_instance(JNIEnv * env) {
25 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
26 return env->NewObject(cls, jhost_method_Host_constructor);
29 jobject jhost_ref(JNIEnv * env, jobject jhost) {
30 return env->NewGlobalRef(jhost);
33 void jhost_unref(JNIEnv * env, jobject jhost) {
34 env->DeleteGlobalRef(jhost);
37 void jhost_bind(jobject jhost, msg_host_t host, JNIEnv * env) {
38 env->SetLongField(jhost, jhost_field_Host_bind, (jlong) (uintptr_t) (host));
41 msg_host_t jhost_get_native(JNIEnv * env, jobject jhost) {
42 return (msg_host_t) (uintptr_t) env->GetLongField(jhost, jhost_field_Host_bind);
45 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_nativeInit(JNIEnv *env, jclass cls) {
46 jclass class_Host = env->FindClass("org/simgrid/msg/Host");
47 jhost_method_Host_constructor = env->GetMethodID(class_Host, "<init>", "()V");
48 jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
49 jhost_field_Host_name = jxbt_get_jfield(env, class_Host, "name", "Ljava/lang/String;");
50 xbt_assert(class_Host && jhost_field_Host_name && jhost_method_Host_constructor && jhost_field_Host_bind,
51 "Native initialization of msg/Host failed. Please report that bug");
54 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getByName(JNIEnv* env, jclass cls, jstring jname)
56 /* get the C string from the java string */
57 if (jname == nullptr) {
58 jxbt_throw_null(env, "No host can have a null name");
61 const char* name = env->GetStringUTFChars(jname, nullptr);
62 /* get the host by name (the hosts are created during the grid resolution) */
63 sg_host_t host = sg_host_by_name(name);
65 if (not host) { /* invalid name */
66 jxbt_throw_host_not_found(env, name);
67 env->ReleaseStringUTFChars(jname, name);
70 env->ReleaseStringUTFChars(jname, name);
72 if (not host->extension(JAVA_HOST_LEVEL)) { /* native host not associated yet with java host */
73 /* Instantiate a new java host */
74 jobject jhost = jhost_new_instance(env);
77 jxbt_throw_jni(env, "java host instantiation failed");
81 /* get a global reference to the newly created host */
82 jhost = jhost_ref(env, jhost);
85 jxbt_throw_jni(env, "new global ref allocation failed");
88 /* Sets the java host name */
89 env->SetObjectField(jhost, jhost_field_Host_name, jname);
90 /* bind the java host and the native host */
91 jhost_bind(jhost, host, env);
93 /* the native host data field is set with the global reference to the java host returned by this function */
94 host->extension_set(JAVA_HOST_LEVEL, jhost);
97 /* return the global reference to the java host instance */
98 return (jobject) host->extension(JAVA_HOST_LEVEL);
101 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
104 sg_host_t host = sg_host_self();
106 if (not host->extension(JAVA_HOST_LEVEL)) {
107 /* the native host not yet associated with the java host instance */
109 /* instantiate a new java host instance */
110 jhost = jhost_new_instance(env);
113 jxbt_throw_jni(env, "java host instantiation failed");
117 /* get a global reference to the newly created host */
118 jhost = jhost_ref(env, jhost);
121 jxbt_throw_jni(env, "global ref allocation failed");
124 /* Sets the host name */
125 jobject jname = env->NewStringUTF(host->get_cname());
126 env->SetObjectField(jhost, jhost_field_Host_name, jname);
127 /* Bind & store it */
128 jhost_bind(jhost, host, env);
129 host->extension_set(JAVA_HOST_LEVEL, jhost);
131 jhost = (jobject) host->extension(JAVA_HOST_LEVEL);
137 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_on(JNIEnv *env, jobject jhost) {
138 sg_host_t host = jhost_get_native(env, jhost);
139 sg_host_turn_on(host);
142 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_off(JNIEnv *env, jobject jhost) {
143 sg_host_t host = jhost_get_native(env, jhost);
144 if (not simgrid::ForcefulKillException::try_n_catch([host]() { sg_host_turn_off(host); }))
145 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Host turned off");
148 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
149 return (jint)sg_host_count();
152 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env, jobject jhost) {
153 const_sg_host_t host = jhost_get_native(env, jhost);
156 jxbt_throw_notbound(env, "host", jhost);
160 return (jdouble)sg_host_get_speed(host);
163 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCoreNumber(JNIEnv * env, jobject jhost) {
164 const_sg_host_t host = jhost_get_native(env, jhost);
167 jxbt_throw_notbound(env, "host", jhost);
171 return (jdouble)sg_host_core_count(host);
174 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getProperty(JNIEnv *env, jobject jhost, jobject jname) {
175 const_sg_host_t host = jhost_get_native(env, jhost);
178 jxbt_throw_notbound(env, "host", jhost);
181 const char* name = env->GetStringUTFChars((jstring)jname, nullptr);
183 const char* property = sg_host_get_property_value(host, name);
188 jobject jproperty = env->NewStringUTF(property);
190 env->ReleaseStringUTFChars((jstring) jname, name);
195 JNIEXPORT void JNICALL
196 Java_org_simgrid_msg_Host_setProperty(JNIEnv *env, jobject jhost, jobject jname, jobject jvalue) {
197 sg_host_t host = jhost_get_native(env, jhost);
200 jxbt_throw_notbound(env, "host", jhost);
203 const char* name = env->GetStringUTFChars((jstring)jname, nullptr);
204 const char* value_java = env->GetStringUTFChars((jstring)jvalue, nullptr);
205 const char* value = xbt_strdup(value_java);
207 sg_host_set_property_value(host, name, value);
209 env->ReleaseStringUTFChars((jstring) jvalue, value_java);
210 env->ReleaseStringUTFChars((jstring) jname, name);
213 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Host_isOn(JNIEnv * env, jobject jhost)
215 const_sg_host_t host = jhost_get_native(env, jhost);
218 jxbt_throw_notbound(env, "host", jhost);
222 return (jboolean)sg_host_is_on(host);
225 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
227 sg_host_t* table = sg_host_list();
228 int count = sg_host_count();
230 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
234 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
237 jxbt_throw_jni(env, "Hosts table allocation failed");
241 for (int index = 0; index < count; index++) {
242 auto jhost = static_cast<jobject>(table[index]->extension(JAVA_HOST_LEVEL));
245 jstring jname = env->NewStringUTF(table[index]->get_cname());
246 jhost = Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
249 env->SetObjectArrayElement(jtable, index, jhost);
255 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setAsyncMailbox(JNIEnv * env, jclass cls_arg, jobject jname)
257 const char* name = env->GetStringUTFChars((jstring)jname, nullptr);
258 sg_mailbox_set_receiver(name);
259 env->ReleaseStringUTFChars((jstring) jname, name);
262 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_updateAllEnergyConsumptions(JNIEnv* env, jclass cls)
264 sg_host_energy_update_all();
267 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getConsumedEnergy (JNIEnv *env, jobject jhost)
269 const_sg_host_t host = jhost_get_native(env, jhost);
272 jxbt_throw_notbound(env, "host", jhost);
276 return sg_host_get_consumed_energy(host);
279 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setPstate(JNIEnv* env, jobject jhost, jint pstate)
281 sg_host_t host = jhost_get_native(env, jhost);
282 sg_host_set_pstate(host, pstate);
284 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstate(JNIEnv* env, jobject jhost)
286 const_sg_host_t host = jhost_get_native(env, jhost);
287 return sg_host_get_pstate(host);
289 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstatesCount(JNIEnv* env, jobject jhost)
291 const_sg_host_t host = jhost_get_native(env, jhost);
292 return sg_host_get_nb_pstates(host);
294 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentPowerPeak(JNIEnv* env, jobject jhost)
296 const_sg_host_t host = jhost_get_native(env, jhost);
297 return sg_host_get_speed(host);
299 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getPowerPeakAt(JNIEnv* env, jobject jhost, jint pstate)
301 const_sg_host_t host = jhost_get_native(env, jhost);
302 return sg_host_get_pstate_speed(host, pstate);
305 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getLoad(JNIEnv* env, jobject jhost)
307 const_sg_host_t host = jhost_get_native(env, jhost);
308 return sg_host_get_load(host);
311 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentLoad (JNIEnv *env, jobject jhost)
313 const_sg_host_t host = jhost_get_native(env, jhost);
316 jxbt_throw_notbound(env, "host", jhost);
320 return sg_host_get_current_load(host);
323 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getComputedFlops (JNIEnv *env, jobject jhost)
325 const_sg_host_t host = jhost_get_native(env, jhost);
328 jxbt_throw_notbound(env, "host", jhost);
332 return sg_host_get_computed_flops(host);
335 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getAvgLoad (JNIEnv *env, jobject jhost)
337 const_sg_host_t host = jhost_get_native(env, jhost);
340 jxbt_throw_notbound(env, "host", jhost);
344 return sg_host_get_avg_load(host);