#include "jmsg_host.h"
#include "jxbt_utilities.h"
-jobject jhost_new_instance(JNIEnv * env)
-{
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
- jclass cls = jxbt_get_class(env, "simgrid/msg/Host");
- jmethodID constructor = jxbt_get_jmethod(env, cls, "<init>", "()V");
+static jmethodID jhost_method_Host_constructor;
+static jfieldID jhost_field_Host_bind;
+static jfieldID jhost_field_Host_name;
- if (!constructor)
- return NULL;
- return (*env)->NewObject(env, cls, constructor);
+jobject jhost_new_instance(JNIEnv * env) {
+ jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
+ return (*env)->NewObject(env, cls, jhost_method_Host_constructor);
}
-jobject jhost_ref(JNIEnv * env, jobject jhost)
-{
+jobject jhost_ref(JNIEnv * env, jobject jhost) {
return (*env)->NewGlobalRef(env, jhost);
}
-void jhost_unref(JNIEnv * env, jobject jhost)
-{
+void jhost_unref(JNIEnv * env, jobject jhost) {
(*env)->DeleteGlobalRef(env, jhost);
}
-void jhost_bind(jobject jhost, m_host_t host, JNIEnv * env)
-{
- jfieldID id = jxbt_get_sfield(env, "simgrid/msg/Host", "bind", "J");
+void jhost_bind(jobject jhost, m_host_t host, JNIEnv * env) {
+ (*env)->SetLongField(env, jhost, jhost_field_Host_bind, (jlong) (long) (host));
+}
- if (!id)
- return;
+m_host_t jhost_get_native(JNIEnv * env, jobject jhost) {
+ return (m_host_t) (long) (*env)->GetLongField(env, jhost, jhost_field_Host_bind);
+}
- (*env)->SetLongField(env, jhost, id, (jlong) (long) (host));
+const char *jhost_get_name(jobject jhost, JNIEnv * env) {
+ m_host_t host = jhost_get_native(env, jhost);
+ return MSG_host_get_name(host);
}
-m_host_t jhost_get_native(JNIEnv * env, jobject jhost)
-{
- jfieldID id = jxbt_get_sfield(env, "simgrid/msg/Host", "bind", "J");
+jboolean jhost_is_valid(jobject jhost, JNIEnv * env) {
+ if ((*env)->GetLongField(env, jhost, jhost_field_Host_bind)) {
+ return JNI_TRUE;
+ } else {
+ return JNI_FALSE;
+ }
+}
- if (!id)
+JNIEXPORT void JNICALL
+Java_org_simgrid_msg_Host_nativeInit(JNIEnv *env, jclass cls) {
+ jclass class_Host = (*env)->FindClass(env, "org/simgrid/msg/Host");
+ jhost_method_Host_constructor = (*env)->GetMethodID(env, class_Host, "<init>", "()V");
+ //FIXME: Don't use jxbt_get_sfield directly, it is slower.
+ jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
+ jhost_field_Host_name = jxbt_get_jfield(env, class_Host, "name", "Ljava/lang/String;");
+ if (!class_Host || !jhost_field_Host_name || !jhost_method_Host_constructor || !jhost_field_Host_bind) {
+ jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
+ }
+}
+JNIEXPORT jobject JNICALL
+Java_org_simgrid_msg_Host_getByName(JNIEnv * env, jclass cls,
+ jstring jname) {
+ m_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;
+ }
+ XBT_DEBUG("Looking for host '%s'",name);
+ /* get the host by name (the hosts are created during the grid resolution) */
+ host = MSG_get_host_by_name(name);
+ XBT_DEBUG("MSG gave %p as native host", host);
+
+ 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);
- return (m_host_t) (long) (*env)->GetLongField(env, jhost, id);
+ /* 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);
}
-const char *jhost_get_name(jobject jhost, JNIEnv * env)
-{
- m_host_t host = jhost_get_native(env, jhost);
- return (const char *) host->name;
+JNIEXPORT jobject JNICALL
+Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
+ jobject jhost;
+
+ m_host_t host = MSG_host_self();
+
+ if (!MSG_host_get_data(host)) {
+ /* the native host not yet associated with the java host instance */
+
+ /* instanciate a new java host instance */
+ 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, "global ref allocation failed");
+ return NULL;
+ }
+ /* Sets the host name */
+ const char *name = MSG_host_get_name(host);
+ jobject jname = (*env)->NewStringUTF(env,name);
+ (*env)->SetObjectField(env, jhost, jhost_field_Host_name, jname);
+ /* Bind & store it */
+ jhost_bind(jhost, host, env);
+ MSG_host_set_data(host, (void *) jhost);
+ } else {
+ jhost = (jobject) MSG_host_get_data(host);
+ }
+
+ return jhost;
+}
+JNIEXPORT jint JNICALL
+Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
+ xbt_dynar_t hosts = MSG_hosts_as_dynar();
+ int nb_host = xbt_dynar_length(hosts);
+ xbt_dynar_free(&hosts);
+ return (jint) nb_host;
}
-void jhost_set_name(jobject jhost, jstring jname, JNIEnv * env)
-{
- const char *name;
+JNIEXPORT jdouble JNICALL
+Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env,
+ jobject jhost) {
m_host_t host = jhost_get_native(env, jhost);
- name = (*env)->GetStringUTFChars(env, jname, 0);
+ if (!host) {
+ jxbt_throw_notbound(env, "host", jhost);
+ return -1;
+ }
+
+ return (jdouble) MSG_get_host_speed(host);
+}
+JNIEXPORT jint JNICALL
+Java_org_simgrid_msg_Host_getLoad(JNIEnv * env, jobject jhost) {
+ m_host_t host = jhost_get_native(env, jhost);
- if (host->name)
- free(host->name);
+ if (!host) {
+ jxbt_throw_notbound(env, "host", jhost);
+ return -1;
+ }
- host->name = xbt_strdup(name);
- (*env)->ReleaseStringUTFChars(env, jname, name);
+ return (jint) MSG_get_host_msgload(host);
}
+JNIEXPORT jboolean JNICALL
+Java_org_simgrid_msg_Host_isAvail(JNIEnv * env, jobject jhost) {
+ m_host_t host = jhost_get_native(env, jhost);
+
+ if (!host) {
+ jxbt_throw_notbound(env, "host", jhost);
+ return 0;
+ }
-jboolean jhost_is_valid(jobject jhost, JNIEnv * env)
+ return (jboolean) MSG_host_is_avail(host);
+}
+
+JNIEXPORT jobjectArray JNICALL
+Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
{
- jfieldID id = jxbt_get_sfield(env, "simgrid/msg/Host", "bind", "J");
+ int index;
+ jobjectArray jtable;
+ jobject jhost;
+ jstring jname;
+ m_host_t host;
- if (!id)
- return 0;
+ xbt_dynar_t table = MSG_hosts_as_dynar();
+ int count = xbt_dynar_length(table);
- if ((*env)->GetLongField(env, jhost, id)) {
- return JNI_TRUE;
- } else {
- return JNI_FALSE;
+ jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
+
+ if (!cls) {
+ return NULL;
+ }
+
+ jtable = (*env)->NewObjectArray(env, (jsize) count, cls, NULL);
+
+ if (!jtable) {
+ jxbt_throw_jni(env, "Hosts table allocation failed");
+ return NULL;
+ }
+
+ for (index = 0; index < count; index++) {
+ host = xbt_dynar_get_as(table,index,m_host_t);
+ jhost = (jobject) (MSG_host_get_data(host));
+
+ if (!jhost) {
+ jname = (*env)->NewStringUTF(env, MSG_host_get_name(host));
+
+ jhost =
+ Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
+ /* FIXME: leak of jname ? */
+ }
+
+ (*env)->SetObjectArrayElement(env, jtable, index, jhost);
}
+ xbt_dynar_free(&table);
+ return jtable;
}
