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 /*
  27  * Common AWT definitions
  28  */
  29 
  30 #ifndef _AWT_
  31 #define _AWT_
  32 
  33 #include "jvm.h"
  34 #include "jni_util.h"
  35 #include "debug_util.h"
  36 
  37 #if !defined(HEADLESS) && !defined(MACOSX)
  38 #include <X11/Xlib.h>
  39 #include <X11/Xutil.h>
  40 typedef char Boolean;
  41 #endif /* !HEADLESS && !MACOSX */
  42 
  43 
  44 /* The JVM instance: defined in awt_MToolkit.c */
  45 extern JavaVM *jvm;
  46 
  47 extern jclass tkClass;
  48 extern jmethodID awtLockMID;
  49 extern jmethodID awtUnlockMID;
  50 extern jmethodID awtWaitMID;
  51 extern jmethodID awtNotifyMID;
  52 extern jmethodID awtNotifyAllMID;
  53 extern jboolean awtLockInited;
  54 
  55 /* Perform sanity and consistency checks on AWT locking */
  56 #ifdef DEBUG
  57 #define DEBUG_AWT_LOCK
  58 #endif
  59 
  60 /*
  61  * The following locking primitives should be defined
  62  *
  63 #define AWT_LOCK()
  64 #define AWT_NOFLUSH_UNLOCK()
  65 #define AWT_WAIT(tm)
  66 #define AWT_NOTIFY()
  67 #define AWT_NOTIFY_ALL()
  68  */
  69 
  70 /*
  71  * Convenience macros based on AWT_NOFLUSH_UNLOCK
  72  */
  73 extern void awt_output_flush();
  74 #define AWT_UNLOCK() AWT_FLUSH_UNLOCK()
  75 #define AWT_FLUSH_UNLOCK() do {                 \
  76     awt_output_flush();                         \
  77     AWT_NOFLUSH_UNLOCK();                       \
  78 } while (0)
  79 
  80 #define AWT_UNLOCK_CHECK_EXCEPTION(env) \
  81     do { \
  82       AWT_UNLOCK(); \
  83       JNU_CHECK_EXCEPTION(env); \
  84     } while (0)
  85 
  86 #define AWT_LOCK_IMPL() \
  87     do { \
  88         (*env)->CallStaticVoidMethod(env, tkClass, awtLockMID); \
  89         if ((*env)->ExceptionCheck(env)) { \
  90             (*env)->ExceptionClear(env); \
  91         } \
  92     } while(0)
  93 
  94 #define AWT_NOFLUSH_UNLOCK_IMPL() \
  95     do { \
  96       jthrowable pendingException; \
  97       if ((pendingException = (*env)->ExceptionOccurred(env)) != NULL) { \
  98          (*env)->ExceptionClear(env); \
  99       } \
 100       (*env)->CallStaticVoidMethod(env, tkClass, awtUnlockMID); \
 101       if ((*env)->ExceptionCheck(env)) { \
 102          (*env)->ExceptionClear(env); \
 103       } \
 104       if (pendingException) { \
 105          (*env)->Throw(env, pendingException); \
 106       } \
 107     } while (0)
 108 #define AWT_WAIT_IMPL(tm) \
 109     (*env)->CallStaticVoidMethod(env, tkClass, awtWaitMID, (jlong)(tm))
 110 #define AWT_NOTIFY_IMPL() \
 111     (*env)->CallStaticVoidMethod(env, tkClass, awtNotifyMID)
 112 #define AWT_NOTIFY_ALL_IMPL() \
 113     (*env)->CallStaticVoidMethod(env, tkClass, awtNotifyAllMID)
 114 
 115 /*
 116  * Unfortunately AWT_LOCK debugging does not work with XAWT due to mixed
 117  * Java/C use of AWT lock.
 118  */
 119 #define AWT_LOCK()           AWT_LOCK_IMPL()
 120 #define AWT_NOFLUSH_UNLOCK() AWT_NOFLUSH_UNLOCK_IMPL()
 121 #define AWT_WAIT(tm)         AWT_WAIT_IMPL(tm)
 122 #define AWT_NOTIFY()         AWT_NOTIFY_IMPL()
 123 #define AWT_NOTIFY_ALL()     AWT_NOTIFY_ALL_IMPL()
 124 
 125 #if !defined(HEADLESS) && !defined(MACOSX)
 126 extern Display         *awt_display; /* awt_GraphicsEnv.c */
 127 extern Boolean          awt_ModLockIsShiftLock; /* XToolkit.c */
 128 #endif /* !HEADLESS && !MACOSX */
 129 
 130 #endif /* ! _AWT_ */