1 /* 2 * Copyright (c) 2011, 2013, 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 static jobject appkitThreadGroup = NULL; 37 38 static inline void attachCurrentThread(void** env) { 39 if ([NSThread isMainThread]) { 40 JavaVMAttachArgs args; 41 args.version = JNI_VERSION_1_4; 42 args.name = "AppKit Thread"; 43 args.group = appkitThreadGroup; 44 (*jvm)->AttachCurrentThreadAsDaemon(jvm, env, &args); 45 } else { 46 (*jvm)->AttachCurrentThreadAsDaemon(jvm, env, NULL); 47 } 48 } 49 50 @implementation ThreadUtilities 51 52 + (JNIEnv*)getJNIEnv { 53 AWT_ASSERT_APPKIT_THREAD; 54 if (appKitEnv == NULL) { 55 attachCurrentThread((void **)&appKitEnv); 56 } 57 return appKitEnv; 58 } 59 60 + (JNIEnv*)getJNIEnvUncached { 61 JNIEnv *env = NULL; 62 attachCurrentThread((void **)&env); 63 return env; 64 } 65 66 + (void)detachCurrentThread { 67 (*jvm)->DetachCurrentThread(jvm); 68 } 69 70 + (void)setAppkitThreadGroup:(jobject)group { 71 appkitThreadGroup = group; 72 } 73 74 + (void)performOnMainThreadWaiting:(BOOL)wait block:(void (^)())block { 75 if ([NSThread isMainThread] && wait == YES) { 76 block(); 77 } else { 78 [JNFRunLoop performOnMainThreadWaiting:wait withBlock:block]; 79 } 80 } 81 82 + (void)performOnMainThread:(SEL)aSelector on:(id)target withObject:(id)arg waitUntilDone:(BOOL)wait { 83 if ([NSThread isMainThread] && wait == YES) { 84 [target performSelector:aSelector withObject:arg]; 85 } else { 86 [JNFRunLoop performOnMainThread:aSelector on:target withObject:arg waitUntilDone:wait]; 87 } 88 } 89 90 @end 91 92 93 void OSXAPP_SetJavaVM(JavaVM *vm) 94 { 95 jvm = vm; 96 } 97