1 /*
   2  * Copyright (c) 2011, 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 #import <AppKit/AppKit.h>
  27 #import <JavaNativeFoundation/JavaNativeFoundation.h>
  28 #import <objc/message.h>
  29 
  30 #import "ThreadUtilities.h"
  31 
  32 
  33 // The following must be named "jvm", as there are extern references to it in AWT
  34 JavaVM *jvm = NULL;
  35 static JNIEnv *appKitEnv = NULL;
  36 
  37 @implementation ThreadUtilities
  38 
  39 + (JNIEnv*)getJNIEnv {
  40 AWT_ASSERT_APPKIT_THREAD;
  41     if (appKitEnv == NULL) {
  42         (*jvm)->AttachCurrentThreadAsDaemon(jvm, (void **)&appKitEnv, NULL);
  43     }
  44     return appKitEnv;
  45 }
  46 
  47 + (JNIEnv*)getJNIEnvUncached {
  48     JNIEnv *env = NULL;
  49     (*jvm)->AttachCurrentThreadAsDaemon(jvm, (void **)&env, nil);
  50     return env;
  51 }
  52 
  53 + (void)performOnMainThreadWaiting:(BOOL)wait block:(void (^)())block {
  54     if ([NSThread isMainThread] && wait == YES) {
  55         block(); 
  56     } else { 
  57         [JNFRunLoop performOnMainThreadWaiting:wait withBlock:block]; 
  58     }
  59 }
  60 
  61 + (void)performOnMainThread:(SEL)aSelector on:(id)target withObject:(id)arg waitUntilDone:(BOOL)wait {
  62     if ([NSThread isMainThread] && wait == YES) {
  63         [target performSelector:aSelector withObject:arg];
  64     } else {
  65         [JNFRunLoop performOnMainThread:aSelector on:target withObject:arg waitUntilDone:wait];
  66     }
  67 }
  68 
  69 @end
  70 
  71 
  72 void OSXAPP_SetJavaVM(JavaVM *vm)
  73 {
  74     jvm = vm;
  75 }
  76