1 /* Functions related to the java comm instances */
3 /* Copyright (c) 2012-2015. 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. */
10 #include "jxbt_utilities.h"
13 #include <simgrid/msg.h>
14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
18 static jfieldID jcomm_field_Comm_bind;
19 static jfieldID jcomm_field_Comm_finished;
20 static jfieldID jcomm_field_Comm_receiving;
21 static jfieldID jtask_field_Comm_task;
22 static jfieldID jcomm_field_Comm_taskBind;
24 void jcomm_bind_task(JNIEnv *env, jobject jcomm) {
25 msg_comm_t comm = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
26 //test if we are receiving or sending a task.
27 jboolean jreceiving = env->GetBooleanField(jcomm, jcomm_field_Comm_receiving);
28 if (jreceiving == JNI_TRUE) {
29 //bind the task object.
30 msg_task_t task = MSG_comm_get_task(comm);
31 xbt_assert(task != nullptr, "Task is nullptr");
32 jobject jtask_global = static_cast<jobject>(MSG_task_get_data(task));
33 //case where the data has already been retrieved
34 if (jtask_global == nullptr) {
38 //Make sure the data will be correctly gc.
39 jobject jtask_local = env->NewLocalRef(jtask_global);
40 env->DeleteGlobalRef(jtask_global);
42 env->SetObjectField(jcomm, jtask_field_Comm_task, jtask_local);
44 MSG_task_set_data(task, nullptr);
48 JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_nativeInit(JNIEnv *env, jclass cls) {
49 jclass jfield_class_Comm = env->FindClass("org/simgrid/msg/Comm");
50 xbt_assert(jfield_class_Comm, "Native initialization of msg/Comm failed. Please report that bug");
52 jcomm_field_Comm_bind = jxbt_get_jfield(env, jfield_class_Comm, "bind", "J");
53 jcomm_field_Comm_taskBind = jxbt_get_jfield(env, jfield_class_Comm, "taskBind", "J");
54 jcomm_field_Comm_receiving = jxbt_get_jfield(env, jfield_class_Comm, "receiving", "Z");
55 jtask_field_Comm_task = jxbt_get_jfield(env, jfield_class_Comm, "task", "Lorg/simgrid/msg/Task;");
56 jcomm_field_Comm_finished = jxbt_get_jfield(env, jfield_class_Comm, "finished", "Z");
57 xbt_assert(jcomm_field_Comm_bind && jcomm_field_Comm_taskBind && jcomm_field_Comm_receiving &&
58 jtask_field_Comm_task && jcomm_field_Comm_finished,
59 "Native initialization of msg/Comm failed. Please report that bug");
62 JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_nativeFinalize(JNIEnv *env, jobject jcomm) {
64 msg_task_t *task_received;
66 task_received = (msg_task_t*) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_taskBind);
67 xbt_free(task_received);
69 comm = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
70 MSG_comm_destroy(comm);
73 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Comm_test(JNIEnv *env, jobject jcomm) {
75 comm = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
77 jboolean finished = env->GetBooleanField(jcomm, jcomm_field_Comm_finished);
78 if (finished == JNI_TRUE) {
83 jxbt_throw_null(env, bprintf("comm is null"));
87 if (MSG_comm_test(comm)) {
88 msg_error_t status = MSG_comm_get_status(comm);
89 if (status == MSG_OK) {
90 jcomm_bind_task(env,jcomm);
93 //send the correct exception
94 jmsg_throw_status(env,status);
100 JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_waitCompletion(JNIEnv *env, jobject jcomm, jdouble timeout) {
101 msg_comm_t comm = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
103 jxbt_throw_null(env, bprintf("comm is null"));
107 jboolean finished = env->GetBooleanField(jcomm, jcomm_field_Comm_finished);
108 if (finished == JNI_TRUE) {
113 status = MSG_comm_wait(comm,static_cast<double>(timeout));
114 env->SetBooleanField(jcomm, jcomm_field_Comm_finished, JNI_TRUE);
115 if (status == MSG_OK) {
116 jcomm_bind_task(env,jcomm);
118 jmsg_throw_status(env,status);
122 static msg_comm_t* jarray_to_commArray(JNIEnv *env, jobjectArray jcomms, /* OUT */ int *count)
124 *count = env->GetArrayLength(jcomms);
125 msg_comm_t* comms = xbt_new(msg_comm_t, *count);
127 for (int i=0; i < *count; i++) {
128 jobject jcomm = env->GetObjectArrayElement(jcomms, i);
129 if (env->ExceptionOccurred())
132 comms[i] = (msg_comm_t) (uintptr_t) env->GetLongField(jcomm, jcomm_field_Comm_bind);
134 jxbt_throw_null(env, bprintf("comm at rank %d is null", i));
138 env->DeleteLocalRef(jcomm); // reduce the load on the garbage collector: we don't need that object anymore
142 JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_waitAll(JNIEnv *env, jclass cls, jobjectArray jcomms, jdouble timeout)
145 msg_comm_t* comms = jarray_to_commArray(env, jcomms, &count);
149 MSG_comm_waitall(comms, count, static_cast<double>(timeout));
152 JNIEXPORT int JNICALL Java_org_simgrid_msg_Comm_waitAny(JNIEnv *env, jclass cls, jobjectArray jcomms)
155 msg_comm_t* comms = jarray_to_commArray(env, jcomms, &count);
158 xbt_dynar_t dyn = xbt_dynar_new(sizeof(msg_comm_t),nullptr);
159 for (int i=0; i<count; i++) {
160 xbt_dynar_push(dyn, &(comms[i]));
163 int rank = MSG_comm_waitany(dyn);
165 xbt_dynar_free(&dyn);