1 /* Functions related to the java process instances. */
3 /* Copyright (c) 2007-2018. 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. */
10 #include "jmsg_process.h"
12 #include "JavaContext.hpp"
14 #include "jmsg_host.h"
15 #include "jxbt_utilities.hpp"
17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
19 jfieldID jprocess_field_Process_bind;
20 jfieldID jprocess_field_Process_host;
21 jfieldID jprocess_field_Process_killTime;
22 jfieldID jprocess_field_Process_name;
23 jfieldID jprocess_field_Process_pid;
24 jfieldID jprocess_field_Process_ppid;
26 jobject jprocess_from_native(msg_process_t process)
28 simgrid::kernel::context_::JavaContext* context =
29 (simgrid::kernel::context_::JavaContext*)process->get_impl()->context_;
30 return context->jprocess;
33 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
35 return env->NewGlobalRef(jprocess);
38 void jprocess_unref(jobject jprocess, JNIEnv* env)
40 env->DeleteGlobalRef(jprocess);
43 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
45 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
48 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
50 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
53 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
54 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
55 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
57 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
58 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
59 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
60 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
61 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
62 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
63 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
64 jprocess_field_Process_host,
65 "Native initialization of msg/Process failed. Please report that bug");
68 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv* env, jobject jprocess_arg, jobject jhost)
70 /* create a global java process instance */
71 jobject jprocess = jprocess_ref(jprocess_arg, env);
73 /* Actually build the MSG process */
74 jstring jname = (jstring)env->GetObjectField(jprocess, jprocess_field_Process_name);
75 const char* name = env->GetStringUTFChars(jname, 0);
76 msg_process_t process =
77 MSG_process_create_from_stdfunc(name, [jprocess]() { simgrid::kernel::context_::java_main_jprocess(jprocess); },
78 /*data*/ nullptr, jhost_get_native(env, jhost), /* properties*/ nullptr);
79 env->ReleaseStringUTFChars(jname, name);
81 /* bind the java process instance to the native process */
82 jprocess_bind(jprocess, process, env);
84 /* Retrieve the kill time from the process */
85 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
86 MSG_process_set_kill_time(process, (double)jkill);
88 /* sets the PID and the PPID of the process */
89 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
90 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
93 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_daemonize(JNIEnv* env, jobject jprocess)
95 msg_process_t process = jprocess_to_native(jprocess, env);
98 jxbt_throw_notbound(env, "process", jprocess);
102 process->daemonize();
105 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv* env, jclass cls)
107 MSG_process_killall();
110 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
112 msg_process_t process = MSG_process_from_PID(pid);
115 jxbt_throw_process_not_found(env, std::string("PID = ") + std::to_string(static_cast<int>(pid)));
119 jobject jprocess = jprocess_from_native(process);
122 jxbt_throw_jni(env, "get process failed");
129 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_nativeGetPID(JNIEnv* env, jobject jprocess)
131 msg_process_t process = jprocess_to_native(jprocess, env);
132 return MSG_process_get_PID(process);
135 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
136 msg_process_t process = jprocess_to_native(jprocess, env);
139 jxbt_throw_notbound(env, "process", jprocess);
142 const char *name = env->GetStringUTFChars((jstring)jname, 0);
144 const char *property = MSG_process_get_property_value(process, name);
148 jobject jproperty = env->NewStringUTF(property);
150 env->ReleaseStringUTFChars((jstring)jname, name);
155 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
157 jobject jprocess = jprocess_from_native(MSG_process_self());
159 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
164 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
166 msg_process_t process = jprocess_to_native(jprocess, env);
169 jxbt_throw_notbound(env, "process", jprocess);
173 /* suspend the process */
177 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
179 msg_process_t process = jprocess_to_native(jprocess, env);
182 jxbt_throw_notbound(env, "process", jprocess);
186 /* resume the process */
191 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
193 msg_process_t process = jprocess_to_native(jprocess, env);
195 jxbt_throw_notbound(env, "process", jprocess);
199 process->set_auto_restart(jauto_restart == JNI_TRUE);
202 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
203 msg_process_t process = jprocess_to_native(jprocess, env);
206 jxbt_throw_notbound(env, "process", jprocess);
213 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
215 msg_process_t process = jprocess_to_native(jprocess, env);
218 jxbt_throw_notbound(env, "process", jprocess);
222 /* true is the process is suspended, false otherwise */
223 return (jboolean)process->is_suspended();
226 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
228 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
230 rv = MSG_process_sleep(time);
232 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
234 jxbt_throw_host_failure(env, "");
238 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
241 rv = MSG_process_sleep((double)jseconds);
242 if (env->ExceptionOccurred())
245 XBT_DEBUG("Status NOK");
246 jmsg_throw_status(env,rv);
250 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
252 /* get the native instances from the java ones */
253 msg_process_t process = jprocess_to_native(jprocess, env);
255 jxbt_throw_notbound(env, "process", jprocess);
259 MSG_process_kill(process);
260 } catch (xbt_ex& ex) {
261 XBT_VERB("Process %s just committed a suicide", MSG_process_get_name(process));
262 xbt_assert(process == MSG_process_self(),
263 "Killing a process should not raise an exception if it's not a suicide. Please report that bug.");
267 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
269 msg_process_t process = jprocess_to_native(jprocess, env);
272 jxbt_throw_notbound(env, "process", jprocess);
276 msg_host_t host = jhost_get_native(env, jhost);
279 jxbt_throw_notbound(env, "host", jhost);
283 /* change the host of the process */
284 process->migrate(host);
286 /* change the host java side */
287 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
290 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
295 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
296 msg_process_t process = jprocess_to_native(jprocess, env);
297 MSG_process_set_kill_time(process, (double)jkilltime);
300 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
301 return (jint) MSG_process_get_number();