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 jstring_wrapper name(env, jname);
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);
70 if (not host->extension(JAVA_HOST_LEVEL)) { /* native host not associated yet with java host */
71 /* Instantiate a new java host */
72 jobject jhost = jhost_new_instance(env);
75 jxbt_throw_jni(env, "java host instantiation failed");
79 /* get a global reference to the newly created host */
80 jhost = jhost_ref(env, jhost);
83 jxbt_throw_jni(env, "new global ref allocation failed");
86 /* Sets the java host name */
87 env->SetObjectField(jhost, jhost_field_Host_name, jname);
88 /* bind the java host and the native host */
89 jhost_bind(jhost, host, env);
91 /* the native host data field is set with the global reference to the java host returned by this function */
92 host->extension_set(JAVA_HOST_LEVEL, jhost);
95 /* return the global reference to the java host instance */
96 return (jobject) host->extension(JAVA_HOST_LEVEL);
99 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
102 sg_host_t host = sg_host_self();
104 if (not host->extension(JAVA_HOST_LEVEL)) {
105 /* the native host not yet associated with the java host instance */
107 /* instantiate a new java host instance */
108 jhost = jhost_new_instance(env);
111 jxbt_throw_jni(env, "java host instantiation failed");
115 /* get a global reference to the newly created host */
116 jhost = jhost_ref(env, jhost);
119 jxbt_throw_jni(env, "global ref allocation failed");
122 /* Sets the host name */
123 jobject jname = env->NewStringUTF(host->get_cname());
124 env->SetObjectField(jhost, jhost_field_Host_name, jname);
125 /* Bind & store it */
126 jhost_bind(jhost, host, env);
127 host->extension_set(JAVA_HOST_LEVEL, jhost);
129 jhost = (jobject) host->extension(JAVA_HOST_LEVEL);
135 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_on(JNIEnv *env, jobject jhost) {
136 sg_host_t host = jhost_get_native(env, jhost);
137 sg_host_turn_on(host);
140 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_off(JNIEnv *env, jobject jhost) {
141 sg_host_t host = jhost_get_native(env, jhost);
142 if (not simgrid::ForcefulKillException::try_n_catch([host]() { sg_host_turn_off(host); }))
143 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Host turned off");
146 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
147 return (jint)sg_host_count();
150 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env, jobject jhost) {
151 const_sg_host_t host = jhost_get_native(env, jhost);
154 jxbt_throw_notbound(env, "host", jhost);
158 return (jdouble)sg_host_get_speed(host);
161 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCoreNumber(JNIEnv * env, jobject jhost) {
162 const_sg_host_t host = jhost_get_native(env, jhost);
165 jxbt_throw_notbound(env, "host", jhost);
169 return (jdouble)sg_host_core_count(host);
172 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getProperty(JNIEnv *env, jobject jhost, jobject jname) {
173 const_sg_host_t host = jhost_get_native(env, jhost);
176 jxbt_throw_notbound(env, "host", jhost);
179 jstring_wrapper name(env, (jstring)jname);
181 const char* property = sg_host_get_property_value(host, name);
186 jobject jproperty = env->NewStringUTF(property);
191 JNIEXPORT void JNICALL
192 Java_org_simgrid_msg_Host_setProperty(JNIEnv *env, jobject jhost, jobject jname, jobject jvalue) {
193 sg_host_t host = jhost_get_native(env, jhost);
196 jxbt_throw_notbound(env, "host", jhost);
199 jstring_wrapper name(env, (jstring)jname);
200 jstring_wrapper value_java(env, (jstring)jvalue);
201 const char* value = xbt_strdup(value_java);
203 sg_host_set_property_value(host, name, value);
206 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Host_isOn(JNIEnv * env, jobject jhost)
208 const_sg_host_t host = jhost_get_native(env, jhost);
211 jxbt_throw_notbound(env, "host", jhost);
215 return (jboolean)sg_host_is_on(host);
218 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
220 sg_host_t* table = sg_host_list();
221 int count = sg_host_count();
223 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
227 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
230 jxbt_throw_jni(env, "Hosts table allocation failed");
234 for (int index = 0; index < count; index++) {
235 auto jhost = static_cast<jobject>(table[index]->extension(JAVA_HOST_LEVEL));
238 jstring jname = env->NewStringUTF(table[index]->get_cname());
239 jhost = Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
242 env->SetObjectArrayElement(jtable, index, jhost);
248 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setAsyncMailbox(JNIEnv * env, jclass cls_arg, jobject jname)
250 jstring_wrapper name(env, (jstring)jname);
251 sg_mailbox_set_receiver(name);
254 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_updateAllEnergyConsumptions(JNIEnv* env, jclass cls)
256 sg_host_energy_update_all();
259 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getConsumedEnergy (JNIEnv *env, jobject jhost)
261 const_sg_host_t host = jhost_get_native(env, jhost);
264 jxbt_throw_notbound(env, "host", jhost);
268 return sg_host_get_consumed_energy(host);
271 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setPstate(JNIEnv* env, jobject jhost, jint pstate)
273 sg_host_t host = jhost_get_native(env, jhost);
274 sg_host_set_pstate(host, pstate);
276 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstate(JNIEnv* env, jobject jhost)
278 const_sg_host_t host = jhost_get_native(env, jhost);
279 return sg_host_get_pstate(host);
281 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstatesCount(JNIEnv* env, jobject jhost)
283 const_sg_host_t host = jhost_get_native(env, jhost);
284 return sg_host_get_nb_pstates(host);
286 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentPowerPeak(JNIEnv* env, jobject jhost)
288 const_sg_host_t host = jhost_get_native(env, jhost);
289 return sg_host_get_speed(host);
291 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getPowerPeakAt(JNIEnv* env, jobject jhost, jint pstate)
293 const_sg_host_t host = jhost_get_native(env, jhost);
294 return sg_host_get_pstate_speed(host, pstate);
297 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getLoad(JNIEnv* env, jobject jhost)
299 const_sg_host_t host = jhost_get_native(env, jhost);
300 return sg_host_get_load(host);
303 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentLoad (JNIEnv *env, jobject jhost)
305 const_sg_host_t host = jhost_get_native(env, jhost);
308 jxbt_throw_notbound(env, "host", jhost);
312 return sg_host_get_current_load(host);
315 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getComputedFlops (JNIEnv *env, jobject jhost)
317 const_sg_host_t host = jhost_get_native(env, jhost);
320 jxbt_throw_notbound(env, "host", jhost);
324 return sg_host_get_computed_flops(host);
327 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getAvgLoad (JNIEnv *env, jobject jhost)
329 const_sg_host_t host = jhost_get_native(env, jhost);
332 jxbt_throw_notbound(env, "host", jhost);
336 return sg_host_get_avg_load(host);