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. */
8 #include "jmsg_process.h"
10 #include "JavaContext.hpp"
12 #include "jmsg_host.h"
13 #include "jxbt_utilities.hpp"
14 #include "simgrid/Exception.hpp"
16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
18 jfieldID jprocess_field_Process_bind;
19 jfieldID jprocess_field_Process_host;
20 jfieldID jprocess_field_Process_killTime;
21 jfieldID jprocess_field_Process_name;
22 jfieldID jprocess_field_Process_pid;
23 jfieldID jprocess_field_Process_ppid;
25 jobject jprocess_from_native(msg_process_t process)
27 simgrid::kernel::context::JavaContext* context =
28 (simgrid::kernel::context::JavaContext*)process->get_impl()->context_;
29 return context->jprocess;
32 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
34 return env->NewGlobalRef(jprocess);
37 void jprocess_unref(jobject jprocess, JNIEnv* env)
39 env->DeleteGlobalRef(jprocess);
42 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
44 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
47 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
49 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
52 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
53 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
54 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
56 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
57 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
58 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
59 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
60 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
61 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
62 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
63 jprocess_field_Process_host,
64 "Native initialization of msg/Process failed. Please report that bug");
67 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv* env, jobject jprocess_arg, jobject jhost)
69 /* create a global java process instance */
70 jobject jprocess = jprocess_ref(jprocess_arg, env);
72 /* Actually build the MSG process */
73 jstring jname = (jstring)env->GetObjectField(jprocess, jprocess_field_Process_name);
74 const char* name = env->GetStringUTFChars(jname, 0);
75 msg_process_t process =
76 MSG_process_create_from_stdfunc(name, [jprocess]() { simgrid::kernel::context::java_main_jprocess(jprocess); },
77 /*data*/ nullptr, jhost_get_native(env, jhost), /* properties*/ nullptr);
78 env->ReleaseStringUTFChars(jname, name);
80 /* bind the java process instance to the native process */
81 jprocess_bind(jprocess, process, env);
83 /* Retrieve the kill time from the process */
84 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
85 MSG_process_set_kill_time(process, (double)jkill);
87 /* sets the PID and the PPID of the process */
88 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
89 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
92 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_daemonize(JNIEnv* env, jobject jprocess)
94 msg_process_t process = jprocess_to_native(jprocess, env);
97 jxbt_throw_notbound(env, "process", jprocess);
101 process->daemonize();
104 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv* env, jclass cls)
106 MSG_process_killall();
109 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
111 msg_process_t process = MSG_process_from_PID(pid);
114 jxbt_throw_process_not_found(env, std::string("PID = ") + std::to_string(static_cast<int>(pid)));
118 jobject jprocess = jprocess_from_native(process);
121 jxbt_throw_jni(env, "get process failed");
128 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_nativeGetPID(JNIEnv* env, jobject jprocess)
130 msg_process_t process = jprocess_to_native(jprocess, env);
131 return MSG_process_get_PID(process);
134 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
135 msg_process_t process = jprocess_to_native(jprocess, env);
138 jxbt_throw_notbound(env, "process", jprocess);
141 const char *name = env->GetStringUTFChars((jstring)jname, 0);
143 const char *property = MSG_process_get_property_value(process, name);
147 jobject jproperty = env->NewStringUTF(property);
149 env->ReleaseStringUTFChars((jstring)jname, name);
154 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
156 jobject jprocess = jprocess_from_native(MSG_process_self());
158 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
163 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
165 msg_process_t process = jprocess_to_native(jprocess, env);
168 jxbt_throw_notbound(env, "process", jprocess);
172 /* suspend the process */
176 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
178 msg_process_t process = jprocess_to_native(jprocess, env);
181 jxbt_throw_notbound(env, "process", jprocess);
185 /* resume the process */
190 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
192 msg_process_t process = jprocess_to_native(jprocess, env);
194 jxbt_throw_notbound(env, "process", jprocess);
198 process->set_auto_restart(jauto_restart == JNI_TRUE);
201 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
202 msg_process_t process = jprocess_to_native(jprocess, env);
205 jxbt_throw_notbound(env, "process", jprocess);
212 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
214 msg_process_t process = jprocess_to_native(jprocess, env);
217 jxbt_throw_notbound(env, "process", jprocess);
221 /* true is the process is suspended, false otherwise */
222 return (jboolean)process->is_suspended();
225 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
227 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
229 rv = MSG_process_sleep(time);
231 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
233 jxbt_throw_host_failure(env, "");
237 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
240 rv = MSG_process_sleep((double)jseconds);
241 if (env->ExceptionOccurred())
244 XBT_DEBUG("Status NOK");
245 jmsg_throw_status(env,rv);
249 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
251 /* get the native instances from the java ones */
252 msg_process_t process = jprocess_to_native(jprocess, env);
254 jxbt_throw_notbound(env, "process", jprocess);
258 MSG_process_kill(process);
259 } catch (xbt_ex& ex) {
260 XBT_VERB("Process %s just committed a suicide", MSG_process_get_name(process));
261 xbt_assert(process == MSG_process_self(),
262 "Killing a process should not raise an exception if it's not a suicide. Please report that bug.");
266 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
268 msg_process_t process = jprocess_to_native(jprocess, env);
271 jxbt_throw_notbound(env, "process", jprocess);
275 msg_host_t host = jhost_get_native(env, jhost);
278 jxbt_throw_notbound(env, "host", jhost);
282 /* change the host of the process */
283 process->migrate(host);
285 /* change the host java side */
286 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
289 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
294 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
295 msg_process_t process = jprocess_to_native(jprocess, env);
296 MSG_process_set_kill_time(process, (double)jkilltime);
299 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
300 return (jint) MSG_process_get_number();