1 /* Functions related to the java task instances. */
3 /* Copyright (c) 2007-2022. 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/s4u/Host.hpp"
12 #include "jmsg_host.h"
13 #include "jmsg_process.h"
14 #include "jmsg_task.h"
15 #include "jxbt_utilities.hpp"
17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
19 static jmethodID jtask_method_Comm_constructor;
21 static jfieldID jtask_field_Task_bind;
22 static jfieldID jtask_field_Task_name;
23 static jfieldID jtask_field_Task_messageSize;
24 static jfieldID jtask_field_Comm_bind;
25 static jfieldID jtask_field_Comm_taskBind;
26 static jfieldID jtask_field_Comm_receiving;
28 void jtask_bind(jobject jtask, msg_task_t task, JNIEnv * env)
30 env->SetLongField(jtask, jtask_field_Task_bind, (intptr_t)task);
33 msg_task_t jtask_to_native(jobject jtask, JNIEnv* env)
35 return (msg_task_t)(intptr_t)env->GetLongField(jtask, jtask_field_Task_bind);
38 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_nativeInit(JNIEnv *env, jclass cls) {
39 jclass jtask_class_Comm = env->FindClass("org/simgrid/msg/Comm");
40 jclass jtask_class_Task = env->FindClass("org/simgrid/msg/Task");
41 xbt_assert(jtask_class_Comm && jtask_class_Task,
42 "Native initialization of msg/Comm or msg/Task failed. Please report that bug");
44 jtask_method_Comm_constructor = env->GetMethodID(jtask_class_Comm, "<init>", "()V");
45 jtask_field_Task_bind = jxbt_get_jfield(env, jtask_class_Task, "bind", "J");
46 jtask_field_Task_name = jxbt_get_jfield(env, jtask_class_Task, "name", "Ljava/lang/String;");
47 jtask_field_Task_messageSize = jxbt_get_jfield(env, jtask_class_Task, "messageSize", "D");
48 jtask_field_Comm_bind = jxbt_get_jfield(env, jtask_class_Comm, "bind", "J");
49 jtask_field_Comm_taskBind = jxbt_get_jfield(env, jtask_class_Comm, "taskBind", "J");
50 jtask_field_Comm_receiving = jxbt_get_jfield(env, jtask_class_Comm, "receiving", "Z");
51 xbt_assert(jtask_field_Task_bind && jtask_field_Comm_bind && jtask_field_Comm_taskBind &&
52 jtask_field_Comm_receiving && jtask_method_Comm_constructor,
53 "Native initialization of msg/Task failed. Please report that bug");
56 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_create(JNIEnv * env, jobject jtask, jstring jname,
57 jdouble jflopsAmount, jdouble jbytesAmount)
59 jstring_wrapper task_name(env, jname);
60 msg_task_t task = MSG_task_create(task_name, jflopsAmount, jbytesAmount, jtask);
62 /* bind & store the task */
63 jtask_bind(jtask, task, env);
66 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_parallelCreate(JNIEnv * env, jobject jtask, jstring jname,
67 jobjectArray jhosts, jdoubleArray jcomputeDurations_arg,
68 jdoubleArray jmessageSizes_arg)
70 int host_count = env->GetArrayLength(jhosts);
72 jdouble* jcomputeDurations = env->GetDoubleArrayElements(jcomputeDurations_arg, nullptr);
73 auto* hosts = new msg_host_t[host_count];
74 auto* computeDurations = new double[host_count];
75 for (int index = 0; index < host_count; index++) {
76 jobject jhost = env->GetObjectArrayElement(jhosts, index);
77 hosts[index] = jhost_get_native(env, jhost);
78 computeDurations[index] = jcomputeDurations[index];
80 env->ReleaseDoubleArrayElements(jcomputeDurations_arg, jcomputeDurations, 0);
82 jdouble* jmessageSizes = env->GetDoubleArrayElements(jmessageSizes_arg, nullptr);
83 auto* messageSizes = new double[host_count * host_count];
84 for (int index = 0; index < host_count * host_count; index++) {
85 messageSizes[index] = jmessageSizes[index];
87 env->ReleaseDoubleArrayElements(jmessageSizes_arg, jmessageSizes, 0);
89 /* get the C string from the java string */
90 jstring_wrapper name(env, jname);
91 msg_task_t task = MSG_parallel_task_create(name, host_count, hosts, computeDurations, messageSizes, jtask);
93 /* associate the java task object and the native task */
94 jtask_bind(jtask, task, env);
97 delete[] computeDurations;
98 delete[] messageSizes;
101 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_cancel(JNIEnv * env, jobject jtask)
103 msg_task_t ptask = jtask_to_native(jtask, env);
106 jxbt_throw_notbound(env, "task", jtask);
110 msg_error_t rv = MSG_task_cancel(ptask);
111 xbt_assert(rv == MSG_OK, "MSG_task_cancel() unexpectedly failed with error code %d. Please report this bug", rv);
114 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_execute(JNIEnv * env, jobject jtask)
116 msg_task_t task = jtask_to_native(jtask, env);
119 jxbt_throw_notbound(env, "task", jtask);
123 if (not simgrid::ForcefulKillException::try_n_catch([&rv, &task]() { rv = MSG_task_execute(task); })) {
124 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
127 if (env->ExceptionOccurred())
130 jmsg_throw_status(env, rv);
134 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_setBound(JNIEnv * env, jobject jtask, jdouble bound)
136 msg_task_t task = jtask_to_native(jtask, env);
139 jxbt_throw_notbound(env, "task", jtask);
142 MSG_task_set_bound(task, bound);
145 JNIEXPORT jstring JNICALL Java_org_simgrid_msg_Task_getName(JNIEnv * env, jobject jtask) {
146 const_msg_task_t task = jtask_to_native(jtask, env);
149 jxbt_throw_notbound(env, "task", jtask);
153 return env->NewStringUTF(MSG_task_get_name(task));
156 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_getSender(JNIEnv * env, jobject jtask) {
157 const_msg_task_t task = jtask_to_native(jtask, env);
160 jxbt_throw_notbound(env, "task", jtask);
164 auto const* process = MSG_task_get_sender(task);
165 if (process == nullptr) {
168 return (jobject)jprocess_from_native(process);
171 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_getSource(JNIEnv * env, jobject jtask)
173 const_msg_task_t task = jtask_to_native(jtask, env);
176 jxbt_throw_notbound(env, "task", jtask);
180 auto const* host = MSG_task_get_source(task);
181 if (host == nullptr) {
184 if (not host->extension(JAVA_HOST_LEVEL)) {
185 jxbt_throw_jni(env, "MSG_task_get_source() failed");
189 return (jobject) host->extension(JAVA_HOST_LEVEL);
192 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Task_getFlopsAmount(JNIEnv * env, jobject jtask)
194 const_msg_task_t ptask = jtask_to_native(jtask, env);
197 jxbt_throw_notbound(env, "task", jtask);
200 return (jdouble)MSG_task_get_flops_amount(ptask);
203 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_setName(JNIEnv *env, jobject jtask, jobject jname) {
204 msg_task_t task = jtask_to_native(jtask, env);
207 jxbt_throw_notbound(env, "task", jtask);
210 jstring_wrapper name(env, static_cast<jstring>(jname));
212 env->SetObjectField(jtask, jtask_field_Task_name, jname);
213 MSG_task_set_name(task, name);
216 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_setPriority(JNIEnv * env, jobject jtask, jdouble priority)
218 msg_task_t task = jtask_to_native(jtask, env);
221 jxbt_throw_notbound(env, "task", jtask);
224 MSG_task_set_priority(task, priority);
227 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_setFlopsAmount (JNIEnv *env, jobject jtask, jdouble computationAmount)
229 msg_task_t task = jtask_to_native(jtask, env);
232 jxbt_throw_notbound(env, "task", jtask);
235 MSG_task_set_flops_amount(task, computationAmount);
238 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_setBytesAmount (JNIEnv *env, jobject jtask, jdouble dataSize)
240 msg_task_t task = jtask_to_native(jtask, env);
243 jxbt_throw_notbound(env, "task", jtask);
246 env->SetDoubleField(jtask, jtask_field_Task_messageSize, dataSize);
247 MSG_task_set_bytes_amount(task, dataSize);
250 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_sendBounded(JNIEnv * env,jobject jtask, jstring jalias,
251 jdouble jtimeout,jdouble maxrate)
253 msg_task_t task = jtask_to_native(jtask, env);
255 jxbt_throw_notbound(env, "task", jtask);
259 /* Add a global ref into the Ctask so that the receiver can use it */
260 MSG_task_set_data(task, env->NewGlobalRef(jtask));
262 jstring_wrapper alias(env, jalias);
263 msg_error_t res = MSG_task_send_with_timeout_bounded(task, alias, jtimeout, maxrate);
266 jmsg_throw_status(env, res);
269 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_receive(JNIEnv* env, jclass cls, jstring jalias, jdouble jtimeout)
271 msg_task_t task = nullptr;
273 jstring_wrapper alias(env, jalias);
275 if (not simgrid::ForcefulKillException::try_n_catch(
276 [&rv, &task, &alias, &jtimeout]() { rv = MSG_task_receive_with_timeout(&task, alias, (double)jtimeout); })) {
277 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
279 if (env->ExceptionOccurred())
282 jmsg_throw_status(env, rv);
285 auto jtask_global = (jobject)MSG_task_get_data(task);
287 /* Convert the global ref into a local ref so that the JVM can free the stuff */
288 jobject jtask_local = env->NewLocalRef(jtask_global);
289 env->DeleteGlobalRef(jtask_global);
290 MSG_task_set_data(task, nullptr);
292 return (jobject) jtask_local;
295 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_irecv(JNIEnv * env, jclass cls, jstring jmailbox) {
296 jclass comm_class = env->FindClass("org/simgrid/msg/Comm");
300 //pointer to store the task object pointer.
301 auto* task = new msg_task_t(nullptr);
302 /* There should be a cache here */
304 jobject jcomm = env->NewObject(comm_class, jtask_method_Comm_constructor);
306 jxbt_throw_jni(env, "Can't create a Comm object.");
310 jstring_wrapper mailbox(env, jmailbox);
311 msg_comm_t comm = MSG_task_irecv(task, mailbox);
313 env->SetLongField(jcomm, jtask_field_Comm_bind, (jlong) (uintptr_t)(comm));
314 env->SetLongField(jcomm, jtask_field_Comm_taskBind, (jlong) (uintptr_t)(task));
315 env->SetBooleanField(jcomm, jtask_field_Comm_receiving, JNI_TRUE);
320 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_receiveBounded(JNIEnv* env, jclass cls, jstring jalias,
321 jdouble jtimeout, jdouble rate)
323 msg_task_t task = nullptr;
325 jstring_wrapper alias(env, jalias);
326 msg_error_t res = MSG_task_receive_with_timeout_bounded(&task, alias, jtimeout, rate);
327 if (env->ExceptionOccurred())
330 jmsg_throw_status(env, res);
333 auto jtask_global = (jobject)MSG_task_get_data(task);
335 /* Convert the global ref into a local ref so that the JVM can free the stuff */
336 jobject jtask_local = env->NewLocalRef(jtask_global);
337 env->DeleteGlobalRef(jtask_global);
338 MSG_task_set_data(task, nullptr);
340 return (jobject) jtask_local;
343 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_irecvBounded(JNIEnv * env, jclass cls, jstring jmailbox,
346 jclass comm_class = env->FindClass("org/simgrid/msg/Comm");
350 // pointer to store the task object pointer.
351 auto* task = new msg_task_t(nullptr);
353 jobject jcomm = env->NewObject(comm_class, jtask_method_Comm_constructor);
355 jxbt_throw_jni(env, "Can't create a Comm object.");
359 jstring_wrapper mailbox(env, jmailbox);
360 msg_comm_t comm = MSG_task_irecv_bounded(task, mailbox, rate);
362 env->SetLongField(jcomm, jtask_field_Comm_bind, (jlong) (uintptr_t)(comm));
363 env->SetLongField(jcomm, jtask_field_Comm_taskBind, (jlong) (uintptr_t)(task));
364 env->SetBooleanField(jcomm, jtask_field_Comm_receiving, JNI_TRUE);
369 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_isend(JNIEnv *env, jobject jtask, jstring jmailbox)
373 jclass comm_class = env->FindClass("org/simgrid/msg/Comm");
378 jobject jcomm = env->NewObject(comm_class, jtask_method_Comm_constructor);
379 jstring_wrapper mailbox(env, jmailbox);
381 msg_task_t task = jtask_to_native(jtask, env);
384 env->DeleteLocalRef(jcomm);
385 jxbt_throw_notbound(env, "task", jtask);
389 MSG_task_set_data(task, env->NewGlobalRef(jtask));
390 comm = MSG_task_isend(task,mailbox);
392 env->SetLongField(jcomm, jtask_field_Comm_bind, (jlong) (uintptr_t)(comm));
393 env->SetLongField(jcomm, jtask_field_Comm_taskBind, (jlong) (uintptr_t)(nullptr));
394 env->SetBooleanField(jcomm, jtask_field_Comm_receiving, JNI_FALSE);
399 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Task_isendBounded(JNIEnv *env, jobject jtask, jstring jmailbox,
406 jclass comm_class = env->FindClass("org/simgrid/msg/Comm");
410 jcomm = env->NewObject(comm_class, jtask_method_Comm_constructor);
411 jstring_wrapper mailbox(env, jmailbox);
413 task = jtask_to_native(jtask, env);
416 env->DeleteLocalRef(jcomm);
417 jxbt_throw_notbound(env, "task", jtask);
421 MSG_task_set_data(task, env->NewGlobalRef(jtask));
422 comm = MSG_task_isend_bounded(task,mailbox,maxrate);
424 env->SetLongField(jcomm, jtask_field_Comm_bind, (jlong) (uintptr_t)(comm));
425 env->SetLongField(jcomm, jtask_field_Comm_taskBind, (jlong) (uintptr_t)(nullptr));
426 env->SetBooleanField(jcomm, jtask_field_Comm_receiving, JNI_FALSE);
431 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_nativeFinalize(JNIEnv * env, jobject jtask)
433 msg_task_t task = jtask_to_native(jtask, env);
436 jxbt_throw_notbound(env, "task", jtask);
440 MSG_task_destroy(task);
443 static void msg_task_cancel_on_failed_dsend(void*t) {
444 auto task = (msg_task_t)t;
445 JNIEnv* env = get_current_thread_env();
447 auto jtask_global = (jobject)MSG_task_get_data(task);
448 /* Destroy the global ref so that the JVM can free the stuff */
449 env->DeleteGlobalRef(jtask_global);
450 /* Don't free the C data here, to avoid a race condition with the GC also sometimes doing so.
451 * A rare memleak is seen as preferable to a rare "free(): invalid pointer" failure that
452 * proves really hard to debug.
455 MSG_task_set_data(task, nullptr);
458 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_dsend(JNIEnv * env, jobject jtask, jstring jalias)
460 jstring_wrapper alias(env, jalias);
462 msg_task_t task = jtask_to_native(jtask, env);
465 jxbt_throw_notbound(env, "task", jtask);
469 /* Pass a global ref to the Jtask into the Ctask so that the receiver can use it */
470 MSG_task_set_data(task, env->NewGlobalRef(jtask));
471 MSG_task_dsend(task, alias, msg_task_cancel_on_failed_dsend);
474 JNIEXPORT void JNICALL Java_org_simgrid_msg_Task_dsendBounded(JNIEnv * env, jobject jtask, jstring jalias,
477 jstring_wrapper alias(env, jalias);
479 msg_task_t task = jtask_to_native(jtask, env);
482 jxbt_throw_notbound(env, "task", jtask);
486 /* Pass a global ref to the Jtask into the Ctask so that the receiver can use it */
487 MSG_task_set_data(task, env->NewGlobalRef(jtask));
488 MSG_task_dsend_bounded(task, alias, msg_task_cancel_on_failed_dsend, maxrate);
491 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Task_listen(JNIEnv * env, jclass cls, jstring jalias)
493 jstring_wrapper alias(env, jalias);
494 return (jboolean)MSG_task_listen(alias);
497 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Task_listenFrom(JNIEnv * env, jclass cls, jstring jalias)
499 jstring_wrapper alias(env, jalias);
500 return (jint)MSG_task_listen_from(alias);