1 /* Functions related to the java host instances. */
3 /* Copyright (c) 2007-2012. The SimGrid Team.
4 * All rights reserved. */
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. */
12 #include "jmsg_host.h"
13 #include "jxbt_utilities.h"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
17 static jmethodID jhost_method_Host_constructor;
18 static jfieldID jhost_field_Host_bind;
19 static jfieldID jhost_field_Host_name;
22 jobject jhost_new_instance(JNIEnv * env) {
23 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
24 return (*env)->NewObject(env, cls, jhost_method_Host_constructor);
27 jobject jhost_ref(JNIEnv * env, jobject jhost) {
28 return (*env)->NewGlobalRef(env, jhost);
31 void jhost_unref(JNIEnv * env, jobject jhost) {
32 (*env)->DeleteGlobalRef(env, jhost);
35 void jhost_bind(jobject jhost, msg_host_t host, JNIEnv * env) {
36 (*env)->SetLongField(env, jhost, jhost_field_Host_bind, (jlong) (long) (host));
39 msg_host_t jhost_get_native(JNIEnv * env, jobject jhost) {
40 return (msg_host_t) (long) (*env)->GetLongField(env, jhost, jhost_field_Host_bind);
43 const char *jhost_get_name(jobject jhost, JNIEnv * env) {
44 msg_host_t host = jhost_get_native(env, jhost);
45 return MSG_host_get_name(host);
48 jboolean jhost_is_valid(jobject jhost, JNIEnv * env) {
49 if ((*env)->GetLongField(env, jhost, jhost_field_Host_bind)) {
56 JNIEXPORT void JNICALL
57 Java_org_simgrid_msg_Host_nativeInit(JNIEnv *env, jclass cls) {
58 jclass class_Host = (*env)->FindClass(env, "org/simgrid/msg/Host");
59 jhost_method_Host_constructor = (*env)->GetMethodID(env, class_Host, "<init>", "()V");
60 jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
61 jhost_field_Host_name = jxbt_get_jfield(env, class_Host, "name", "Ljava/lang/String;");
62 if (!class_Host || !jhost_field_Host_name || !jhost_method_Host_constructor || !jhost_field_Host_bind) {
63 jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
66 JNIEXPORT jobject JNICALL
67 Java_org_simgrid_msg_Host_getByName(JNIEnv * env, jclass cls,
69 msg_host_t host; /* native host */
70 jobject jhost; /* global reference to the java host instance returned */
72 /* get the C string from the java string */
73 const char *name = (*env)->GetStringUTFChars(env, jname, 0);
75 jxbt_throw_null(env,bprintf("No host can have a null name"));
78 /* get the host by name (the hosts are created during the grid resolution) */
79 host = MSG_get_host_by_name(name);
81 if (!host) { /* invalid name */
82 jxbt_throw_host_not_found(env, name);
83 (*env)->ReleaseStringUTFChars(env, jname, name);
86 (*env)->ReleaseStringUTFChars(env, jname, name);
88 if (!MSG_host_get_data(host)) { /* native host not associated yet with java host */
90 /* Instantiate a new java host */
91 jhost = jhost_new_instance(env);
94 jxbt_throw_jni(env, "java host instantiation failed");
98 /* get a global reference to the newly created host */
99 jhost = jhost_ref(env, jhost);
102 jxbt_throw_jni(env, "new global ref allocation failed");
105 /* Sets the java host name */
106 (*env)->SetObjectField(env, jhost, jhost_field_Host_name, jname);
107 /* bind the java host and the native host */
108 jhost_bind(jhost, host, env);
110 /* the native host data field is set with the global reference to the
111 * java host returned by this function
113 MSG_host_set_data(host, (void *) jhost);
116 /* return the global reference to the java host instance */
117 return (jobject) MSG_host_get_data(host);
120 JNIEXPORT jobject JNICALL
121 Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
124 msg_host_t host = MSG_host_self();
126 if (!MSG_host_get_data(host)) {
127 /* the native host not yet associated with the java host instance */
129 /* instanciate a new java host instance */
130 jhost = jhost_new_instance(env);
133 jxbt_throw_jni(env, "java host instantiation failed");
137 /* get a global reference to the newly created host */
138 jhost = jhost_ref(env, jhost);
141 jxbt_throw_jni(env, "global ref allocation failed");
144 /* Sets the host name */
145 const char *name = MSG_host_get_name(host);
146 jobject jname = (*env)->NewStringUTF(env,name);
147 (*env)->SetObjectField(env, jhost, jhost_field_Host_name, jname);
148 /* Bind & store it */
149 jhost_bind(jhost, host, env);
150 MSG_host_set_data(host, (void *) jhost);
152 jhost = (jobject) MSG_host_get_data(host);
157 JNIEXPORT jint JNICALL
158 Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
159 xbt_dynar_t hosts = MSG_hosts_as_dynar();
160 int nb_host = xbt_dynar_length(hosts);
161 xbt_dynar_free(&hosts);
162 return (jint) nb_host;
165 JNIEXPORT jdouble JNICALL
166 Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env,
168 msg_host_t host = jhost_get_native(env, jhost);
171 jxbt_throw_notbound(env, "host", jhost);
175 return (jdouble) MSG_get_host_speed(host);
177 JNIEXPORT jint JNICALL
178 Java_org_simgrid_msg_Host_getLoad(JNIEnv * env, jobject jhost) {
179 msg_host_t host = jhost_get_native(env, jhost);
182 jxbt_throw_notbound(env, "host", jhost);
186 return (jint) MSG_get_host_msgload(host);
188 JNIEXPORT jobject JNICALL
189 Java_org_simgrid_msg_Host_getProperty(JNIEnv *env, jobject jhost, jobject jname) {
190 msg_host_t host = jhost_get_native(env, jhost);
193 jxbt_throw_notbound(env, "host", jhost);
196 const char *name = (*env)->GetStringUTFChars(env, jname, 0);
198 const char *property = MSG_host_get_property_value(host, name);
203 jobject jproperty = (*env)->NewStringUTF(env, property);
205 (*env)->ReleaseStringUTFChars(env, jname, name);
209 JNIEXPORT void JNICALL
210 Java_org_simgrid_msg_Host_setProperty(JNIEnv *env, jobject jhost, jobject jname, jobject jvalue) {
211 msg_host_t host = jhost_get_native(env, jhost);
214 jxbt_throw_notbound(env, "host", jhost);
217 const char *name = (*env)->GetStringUTFChars(env, jname, 0);
218 const char *value_java = (*env)->GetStringUTFChars(env, jvalue, 0);
219 char *value = strdup(value_java);
221 MSG_host_set_property_value(host,name,value,xbt_free);
223 (*env)->ReleaseStringUTFChars(env, jvalue, value);
224 (*env)->ReleaseStringUTFChars(env, jname, name);
227 JNIEXPORT jboolean JNICALL
228 Java_org_simgrid_msg_Host_isAvail(JNIEnv * env, jobject jhost) {
229 msg_host_t host = jhost_get_native(env, jhost);
232 jxbt_throw_notbound(env, "host", jhost);
236 return (jboolean) MSG_host_is_avail(host);
239 JNIEXPORT jobjectArray JNICALL
240 Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
248 xbt_dynar_t table = MSG_hosts_as_dynar();
249 int count = xbt_dynar_length(table);
251 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
257 jtable = (*env)->NewObjectArray(env, (jsize) count, cls, NULL);
260 jxbt_throw_jni(env, "Hosts table allocation failed");
264 for (index = 0; index < count; index++) {
265 host = xbt_dynar_get_as(table,index,msg_host_t);
266 jhost = (jobject) (MSG_host_get_data(host));
269 jname = (*env)->NewStringUTF(env, MSG_host_get_name(host));
272 Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
273 /* FIXME: leak of jname ? */
276 (*env)->SetObjectArrayElement(env, jtable, index, jhost);
278 xbt_dynar_free(&table);