1/*
2 * Copyright (c) 1995, 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
26#ifdef HEADLESS
27    #error This file should not be included in headless library
28#endif
29
30#include "awt_p.h"
31#include "color.h"
32#include <X11/Xatom.h>
33#include <X11/Xmd.h>
34#include <X11/Xutil.h>
35#include <X11/Xproto.h>
36#include <jni.h>
37#include <jni_util.h>
38#include <sys/time.h>
39
40
41#include "java_awt_event_MouseWheelEvent.h"
42
43/*
44 * Called by "ToolkitErrorHandler" function in "XlibWrapper.c" file.
45 */
46XErrorHandler current_native_xerror_handler = NULL;
47
48extern jint getModifiers(uint32_t state, jint button, jint keyCode);
49extern jint getButton(uint32_t button);
50
51static Atom OLDecorDelAtom = 0;
52static Atom MWMHints = 0;
53static Atom DTWMHints = 0;
54static Atom decor_list[9];
55
56#ifndef MAX
57#define MAX(a,b) ((a) > (b) ? (a) : (b))
58#endif
59
60#ifndef MIN
61#define MIN(a,b) ((a) < (b) ? (a) : (b))
62#endif
63
64jboolean
65awtJNI_ThreadYield(JNIEnv *env) {
66
67    static jclass threadClass = NULL;
68    static jmethodID yieldMethodID = NULL;
69
70    /* Initialize our java identifiers once. Checking before locking
71     * is a huge performance win.
72     */
73    if (threadClass == NULL) {
74        // should enter a monitor here...
75        Boolean err = FALSE;
76        if (threadClass == NULL) {
77            jclass tc = (*env)->FindClass(env, "java/lang/Thread");
78            CHECK_NULL_RETURN(tc, JNI_FALSE);
79            threadClass = (*env)->NewGlobalRef(env, tc);
80            (*env)->DeleteLocalRef(env, tc);
81            if (threadClass != NULL) {
82                yieldMethodID = (*env)->GetStaticMethodID(env,
83                                              threadClass,
84                                              "yield",
85                                              "()V"
86                                                );
87            }
88        }
89        if (yieldMethodID == NULL) {
90            threadClass = NULL;
91            err = TRUE;
92        }
93        if (err) {
94            return JNI_FALSE;
95        }
96    } /* threadClass == NULL*/
97
98    (*env)->CallStaticVoidMethod(env, threadClass, yieldMethodID);
99    DASSERT(!((*env)->ExceptionOccurred(env)));
100    if ((*env)->ExceptionCheck(env)) {
101        return JNI_FALSE;
102    }
103    return JNI_TRUE;
104} /* awtJNI_ThreadYield() */
105