src/jmsg_task.c

   1 /* Functions related to the java task instances.                            */
   2
   3 /* Copyright (c) 2007, 2009, 2010. The SimGrid Team.
   4  * All rights reserved.                                                     */
   5
   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. */
   8
   9 #include "jmsg.h"
  10 #include "jmsg_task.h"
  11 #include "jxbt_utilities.h"
  12
  13 #include <msg/msg.h>
  14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
  15
  16 static jmethodID jtask_field_Comm_constructor;
  17
  18 static jfieldID jtask_field_Task_bind;
  19 static jfieldID jtask_field_Comm_bind;
  20 static jfieldID jtask_field_Comm_taskBind;
  21 static jfieldID jtask_field_Comm_receiving;
  22
  23 void jtask_bind(jobject jtask, m_task_t task, JNIEnv * env)
  24 {
  25   (*env)->SetLongField(env, jtask, jtask_field_Task_bind, (jlong) (long) (task));
  26 }
  27
  28 m_task_t jtask_to_native_task(jobject jtask, JNIEnv * env)
  29 {
  30   return (m_task_t) (long) (*env)->GetLongField(env, jtask, jtask_field_Task_bind);
  31 }
  32
  33 jboolean jtask_is_valid(jobject jtask, JNIEnv * env)
  34 {
  35   return (*env)->GetLongField(env, jtask, jtask_field_Task_bind) ? JNI_TRUE : JNI_FALSE;
  36 }
  37
  38 JNIEXPORT void JNICALL
  39 Java_org_simgrid_msg_Task_nativeInit(JNIEnv *env, jclass cls) {
  40         jclass jtask_class_Comm = (*env)->FindClass(env, "org/simgrid/msg/Comm");
  41
  42         jtask_field_Comm_constructor = (*env)->GetMethodID(env, jtask_class_Comm, "<init>", "()V");
  43         //FIXME: Don't use jxbt_get_sfield directly.
  44         jtask_field_Task_bind = jxbt_get_sfield(env, "org/simgrid/msg/Task", "bind", "J");
  45         jtask_field_Comm_bind = jxbt_get_sfield(env, "org/simgrid/msg/Comm", "bind", "J");
  46         jtask_field_Comm_taskBind = jxbt_get_sfield(env, "org/simgrid/msg/Comm", "taskBind", "J");
  47         jtask_field_Comm_receiving = jxbt_get_sfield(env, "org/simgrid/msg/Comm", "receiving", "Z");
  48 }
  49
  50 JNIEXPORT jobject JNICALL
  51 Java_org_simgrid_msg_Task_irecv(JNIEnv * env, jclass cls, jstring jmailbox) {
  52         msg_comm_t comm;
  53         const char *mailbox;
  54         jclass comm_class;
  55         //pointer to store the task object pointer.
  56         m_task_t *task = xbt_new(m_task_t,1);
  57         *task = NULL;
  58         /* There should be a cache here */
  59         comm_class = (*env)->FindClass(env, "org/simgrid/msg/Comm");
  60
  61         if (!comm_class) {
  62                 jxbt_throw_native(env,bprintf("fieldID or methodID or class not found."));
  63                 return NULL;
  64         }
  65
  66         jobject jcomm = (*env)->NewObject(env, comm_class, jtask_field_Comm_constructor);
  67         if (!jcomm) {
  68                 jxbt_throw_native(env,bprintf("Can't create a Comm object."));
  69                 return NULL;
  70         }
  71
  72         mailbox = (*env)->GetStringUTFChars(env, jmailbox, 0);
  73
  74         comm = MSG_task_irecv(task,mailbox);
  75
  76         (*env)->SetLongField(env, jcomm, jtask_field_Comm_bind, (jlong) (long)(comm));
  77         (*env)->SetLongField(env, jcomm, jtask_field_Comm_taskBind, (jlong) (long)(task));
  78         (*env)->SetBooleanField(env, jcomm, jtask_field_Comm_receiving, JNI_TRUE);
  79
  80         (*env)->ReleaseStringUTFChars(env, jmailbox, mailbox);
  81
  82         return jcomm;
  83 }
  84
  85 JNIEXPORT jobject JNICALL
  86 Java_org_simgrid_msg_Task_isend(JNIEnv *env, jobject jtask, jstring jmailbox) {
  87         jclass comm_class;
  88
  89         const char *mailbox;
  90
  91         m_task_t task;
  92
  93         jobject jcomm;
  94         msg_comm_t comm;
  95
  96         comm_class = (*env)->FindClass(env, "org/simgrid/msg/Comm");
  97
  98         if (!comm_class) return NULL;
  99
 100         jcomm = (*env)->NewObject(env, comm_class, jtask_field_Comm_constructor);
 101         mailbox = (*env)->GetStringUTFChars(env, jmailbox, 0);
 102
 103         task = jtask_to_native_task(jtask, env);
 104
 105         if (!task) {
 106     (*env)->ReleaseStringUTFChars(env, jmailbox, mailbox);
 107     (*env)->DeleteLocalRef(env, jcomm);
 108     jxbt_throw_notbound(env, "task", jtask);
 109                 return NULL;
 110         }
 111
 112   MSG_task_set_data(task, (void *) (*env)->NewGlobalRef(env, jtask));
 113         comm = MSG_task_isend(task,mailbox);
 114
 115         (*env)->SetLongField(env, jcomm, jtask_field_Comm_bind, (jlong) (long)(comm));
 116         (*env)->SetLongField(env, jcomm, jtask_field_Comm_taskBind, (jlong) (long)(NULL));
 117         (*env)->SetBooleanField(env, jcomm, jtask_field_Comm_receiving, JNI_FALSE);
 118
 119         (*env)->ReleaseStringUTFChars(env, jmailbox, mailbox);
 120
 121         return jcomm;
 122 }