1 /*
   2  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 #include <com_sun_glass_ui_gtk_GtkTimer.h>
  26 #include "glass_general.h"
  27 
  28 #include <glib.h>
  29 #include <gdk/gdk.h>
  30 #include <stdlib.h>
  31 
  32 static gboolean call_runnable_in_timer
  33   (gpointer);
  34 
  35 extern "C" {
  36 
  37 /*
  38  * Class:     com_sun_glass_ui_gtk_GtkTimer
  39  * Method:    _start
  40  * Signature: (Ljava/lang/Runnable;I)J
  41  */
  42 JNIEXPORT jlong JNICALL Java_com_sun_glass_ui_gtk_GtkTimer__1start
  43   (JNIEnv * env, jobject obj, jobject runnable, jint period)
  44 {
  45     (void)obj;
  46 
  47     RunnableContext* context = (RunnableContext*) malloc(sizeof(RunnableContext));
  48     context->runnable = env->NewGlobalRef(runnable);
  49     context->flag = 0;
  50     gdk_threads_add_timeout_full(G_PRIORITY_HIGH_IDLE, period, call_runnable_in_timer, context, NULL);
  51     return PTR_TO_JLONG(context);
  52 }
  53 
  54 /*
  55  * Class:     com_sun_glass_ui_gtk_GtkTimer
  56  * Method:    _stop
  57  * Signature: (J)V
  58  */
  59 JNIEXPORT void JNICALL Java_com_sun_glass_ui_gtk_GtkTimer__1stop
  60   (JNIEnv * env, jobject obj, jlong ptr)
  61 {
  62     (void)obj;
  63 
  64     RunnableContext* context = (RunnableContext*) JLONG_TO_PTR(ptr);
  65     context->flag = 1;
  66     env->DeleteGlobalRef(context->runnable);
  67     context->runnable = NULL;
  68 }
  69 
  70 } // extern "C"
  71 
  72 
  73 static gboolean call_runnable_in_timer
  74   (gpointer data)
  75 {
  76     RunnableContext* context = (RunnableContext*) data;
  77     if (context->flag) {
  78         free(context);
  79         return FALSE;
  80     }
  81     else if (context->runnable) {
  82         JNIEnv *env;
  83         int envStatus = javaVM->GetEnv((void **)&env, JNI_VERSION_1_6);
  84         if (envStatus == JNI_EDETACHED) {
  85             javaVM->AttachCurrentThread((void **)&env, NULL);
  86         }
  87 
  88         env->CallVoidMethod(context->runnable, jRunnableRun, NULL);
  89         LOG_EXCEPTION(env);
  90 
  91         if (envStatus == JNI_EDETACHED) {
  92             javaVM->DetachCurrentThread();
  93         }
  94     }
  95     return TRUE;
  96 }
  97