1 /*
2 * Copyright (c) 2000, 2015, 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
32 #include <jvm.h>
33 #include "gdefs.h"
34
35 #include <sys/param.h>
36 #include <sys/utsname.h>
37
38 #ifdef AIX
39 #include "porting_aix.h" /* For the 'dladdr' function. */
40 #endif
41
42 #ifdef DEBUG
43 #define VERBOSE_AWT_DEBUG
44 #endif
45
46 static void *awtHandle = NULL;
47
48 typedef jint JNICALL JNI_OnLoad_type(JavaVM *vm, void *reserved);
49
50 /* Initialize the Java VM instance variable when the library is
51 first loaded */
52 JavaVM *jvm;
53
54 JNIEXPORT jboolean JNICALL AWTIsHeadless() {
55 static JNIEnv *env = NULL;
56 static jboolean isHeadless;
57 jmethodID headlessFn;
58 jclass graphicsEnvClass;
59
60 if (env == NULL) {
61 env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
62 graphicsEnvClass = (*env)->FindClass(env,
63 "java/awt/GraphicsEnvironment");
64 if (graphicsEnvClass == NULL) {
65 return JNI_TRUE;
66 }
67 headlessFn = (*env)->GetStaticMethodID(env,
68 graphicsEnvClass, "isHeadless", "()Z");
69 if (headlessFn == NULL) {
70 return JNI_TRUE;
71 }
72 isHeadless = (*env)->CallStaticBooleanMethod(env, graphicsEnvClass,
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1 /*
2 * Copyright (c) 2000, 2018, 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
32 #include <jvm.h>
33 #include "gdefs.h"
34
35 #include <sys/param.h>
36 #include <sys/utsname.h>
37
38 #ifdef AIX
39 #include "porting_aix.h" /* For the 'dladdr' function. */
40 #endif
41
42 #ifdef DEBUG
43 #define VERBOSE_AWT_DEBUG
44 #endif
45
46 static void *awtHandle = NULL;
47
48 typedef jint JNICALL JNI_OnLoad_type(JavaVM *vm, void *reserved);
49
50 /* Initialize the Java VM instance variable when the library is
51 first loaded */
52 JNIEXPORT JavaVM *jvm;
53
54 JNIEXPORT jboolean JNICALL AWTIsHeadless() {
55 static JNIEnv *env = NULL;
56 static jboolean isHeadless;
57 jmethodID headlessFn;
58 jclass graphicsEnvClass;
59
60 if (env == NULL) {
61 env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
62 graphicsEnvClass = (*env)->FindClass(env,
63 "java/awt/GraphicsEnvironment");
64 if (graphicsEnvClass == NULL) {
65 return JNI_TRUE;
66 }
67 headlessFn = (*env)->GetStaticMethodID(env,
68 graphicsEnvClass, "isHeadless", "()Z");
69 if (headlessFn == NULL) {
70 return JNI_TRUE;
71 }
72 isHeadless = (*env)->CallStaticBooleanMethod(env, graphicsEnvClass,
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