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);
16 static jfieldID jcomm_field_Comm_bind;
17 static jfieldID jcomm_field_Comm_finished;
18 static jfieldID jcomm_field_Comm_receiving;
19 static jfieldID jtask_field_Comm_task;
20 static jfieldID jcomm_field_Comm_taskBind;
22 void jcomm_bind_task(JNIEnv *env, jobject jcomm) {
23 msg_comm_t comm = (msg_comm_t) (long) (*env)->GetLongField(env, jcomm, jcomm_field_Comm_bind);
24 //test if we are receiving or sending a task.
25 jboolean jreceiving = (*env)->GetBooleanField(env, jcomm, jcomm_field_Comm_receiving);
26 if (jreceiving == JNI_TRUE) {
27 //bind the task object.
28 msg_task_t task = MSG_comm_get_task(comm);
29 xbt_assert(task != NULL, "Task is NULL");
30 jobject jtask_global = MSG_task_get_data(task);
31 //case where the data has already been retrieved
32 if (jtask_global == NULL) {
36 //Make sure the data will be correctly gc.
37 jobject jtask_local = (*env)->NewLocalRef(env, jtask_global);
38 (*env)->DeleteGlobalRef(env, jtask_global);
40 (*env)->SetObjectField(env, jcomm, jtask_field_Comm_task, jtask_local);
42 MSG_task_set_data(task, NULL);
47 JNIEXPORT void JNICALL
48 Java_org_simgrid_msg_Comm_nativeInit(JNIEnv *env, jclass cls) {
49 jclass jfield_class_Comm = (*env)->FindClass(env, "org/simgrid/msg/Comm");
50 if (!jfield_class_Comm) {
51 jxbt_throw_native(env,bprintf("Can't find the org/simgrid/msg/Comm class."));
54 jcomm_field_Comm_bind = jxbt_get_jfield(env, jfield_class_Comm, "bind", "J");
55 jcomm_field_Comm_taskBind = jxbt_get_jfield(env, jfield_class_Comm, "taskBind", "J");
56 jcomm_field_Comm_receiving = jxbt_get_jfield(env, jfield_class_Comm, "receiving", "Z");
57 jtask_field_Comm_task = jxbt_get_jfield(env, jfield_class_Comm, "task", "Lorg/simgrid/msg/Task;");
58 jcomm_field_Comm_finished = jxbt_get_jfield(env, jfield_class_Comm, "finished", "Z");
59 if (!jcomm_field_Comm_bind || !jcomm_field_Comm_taskBind || !jcomm_field_Comm_receiving || !jtask_field_Comm_task || !jcomm_field_Comm_finished) {
60 jxbt_throw_native(env,bprintf("Can't find some fields in Java class."));
64 JNIEXPORT void JNICALL
65 Java_org_simgrid_msg_Comm_nativeFinalize(JNIEnv *env, jobject jcomm) {
67 msg_task_t *task_received;
69 task_received = (msg_task_t*) (long) (*env)->GetLongField(env, jcomm, jcomm_field_Comm_taskBind);
70 xbt_free(task_received);
72 comm = (msg_comm_t) (long) (*env)->GetLongField(env, jcomm, jcomm_field_Comm_bind);
73 MSG_comm_destroy(comm);
76 JNIEXPORT jboolean JNICALL
77 Java_org_simgrid_msg_Comm_test(JNIEnv *env, jobject jcomm) {
79 comm = (msg_comm_t) (long) (*env)->GetLongField(env, jcomm, jcomm_field_Comm_bind);
81 jboolean finished = (*env)->GetBooleanField(env, jcomm, jcomm_field_Comm_finished);
82 if (finished == JNI_TRUE) {
87 jxbt_throw_native(env,bprintf("comm is null"));
91 if (MSG_comm_test(comm)) {
92 msg_error_t status = MSG_comm_get_status(comm);
93 if (status == MSG_OK) {
94 jcomm_bind_task(env,jcomm);
97 //send the correct exception
98 jmsg_throw_status(env,status);
103 JNIEXPORT void JNICALL
104 Java_org_simgrid_msg_Comm_waitCompletion(JNIEnv *env, jobject jcomm, jdouble timeout) {
105 msg_comm_t comm = (msg_comm_t) (long) (*env)->GetLongField(env, jcomm, jcomm_field_Comm_bind);
107 jxbt_throw_native(env,bprintf("comm is null"));
111 jboolean finished = (*env)->GetBooleanField(env, jcomm, jcomm_field_Comm_finished);
112 if (finished == JNI_TRUE) {
117 status = MSG_comm_wait(comm,(double)timeout);
118 (*env)->SetBooleanField(env, jcomm, jcomm_field_Comm_finished, JNI_TRUE);
119 if (status == MSG_OK) {
120 jcomm_bind_task(env,jcomm);
124 jmsg_throw_status(env,status);