| /* |
| * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #import "com_apple_concurrent_LibDispatchNative.h" |
| |
| #import <dispatch/dispatch.h> |
| #import <JavaNativeFoundation/JavaNativeFoundation.h> |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeIsDispatchSupported |
| * Signature: ()Z |
| */ |
| JNIEXPORT jboolean JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeIsDispatchSupported |
| (JNIEnv *env, jclass clazz) |
| { |
| return JNI_TRUE; |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeGetMainQueue |
| * Signature: ()J |
| */ |
| JNIEXPORT jlong JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeGetMainQueue |
| (JNIEnv *env, jclass clazz) |
| { |
| dispatch_queue_t queue = dispatch_get_main_queue(); |
| return ptr_to_jlong(queue); |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeCreateConcurrentQueue |
| * Signature: (I)J |
| */ |
| JNIEXPORT jlong JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeCreateConcurrentQueue |
| (JNIEnv *env, jclass clazz, jint priority) |
| { |
| dispatch_queue_t queue = dispatch_get_global_queue((long)priority, 0); |
| return ptr_to_jlong(queue); |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeCreateSerialQueue |
| * Signature: (Ljava/lang/String;)J |
| */ |
| JNIEXPORT jlong JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeCreateSerialQueue |
| (JNIEnv *env, jclass clazz, jstring name) |
| { |
| if (name == NULL) return 0L; |
| |
| jboolean isCopy; |
| const char *queue_name = (*env)->GetStringUTFChars(env, name, &isCopy); |
| dispatch_queue_t queue = dispatch_queue_create(queue_name, NULL); |
| (*env)->ReleaseStringUTFChars(env, name, queue_name); |
| |
| return ptr_to_jlong(queue); |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeReleaseQueue |
| * Signature: (J)V |
| */ |
| JNIEXPORT void JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeReleaseQueue |
| (JNIEnv *env, jclass clazz, jlong nativeQueue) |
| { |
| if (nativeQueue == 0L) return; |
| dispatch_release((dispatch_queue_t)jlong_to_ptr(nativeQueue)); |
| } |
| |
| |
| static JNF_CLASS_CACHE(jc_Runnable, "java/lang/Runnable"); |
| static JNF_MEMBER_CACHE(jm_run, jc_Runnable, "run", "()V"); |
| |
| static void perform_dispatch(JNIEnv *env, jlong nativeQueue, jobject runnable, void (*dispatch_fxn)(dispatch_queue_t, dispatch_block_t)) |
| { |
| JNF_COCOA_ENTER(env); |
| dispatch_queue_t queue = (dispatch_queue_t)jlong_to_ptr(nativeQueue); |
| if (queue == NULL) return; // shouldn't happen |
| |
| // create a global-ref around the Runnable, so it can be safely passed to the dispatch thread |
| JNFJObjectWrapper *wrappedRunnable = [[JNFJObjectWrapper alloc] initWithJObject:runnable withEnv:env]; |
| |
| dispatch_fxn(queue, ^{ |
| // attach the dispatch thread to the JVM if necessary, and get an env |
| JNFThreadContext ctx = JNFThreadDetachOnThreadDeath | JNFThreadSetSystemClassLoaderOnAttach | JNFThreadAttachAsDaemon; |
| JNIEnv *blockEnv = JNFObtainEnv(&ctx); |
| |
| JNF_COCOA_ENTER(blockEnv); |
| |
| // call the user's runnable |
| JNFCallObjectMethod(blockEnv, [wrappedRunnable jObject], jm_run); |
| |
| // explicitly clear object while we have an env (it's cheaper that way) |
| [wrappedRunnable setJObject:NULL withEnv:blockEnv]; |
| |
| JNF_COCOA_EXIT(blockEnv); |
| |
| // let the env go, but leave the thread attached as a daemon |
| JNFReleaseEnv(blockEnv, &ctx); |
| }); |
| |
| // release this thread's interest in the Runnable, the block |
| // will have retained the it's own interest above |
| [wrappedRunnable release]; |
| |
| JNF_COCOA_EXIT(env); |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeExecuteAsync |
| * Signature: (JLjava/lang/Runnable;)V |
| */ |
| JNIEXPORT void JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeExecuteAsync |
| (JNIEnv *env, jclass clazz, jlong nativeQueue, jobject runnable) |
| { |
| // enqueues and returns |
| perform_dispatch(env, nativeQueue, runnable, dispatch_async); |
| } |
| |
| |
| /* |
| * Class: com_apple_concurrent_LibDispatchNative |
| * Method: nativeExecuteSync |
| * Signature: (JLjava/lang/Runnable;)V |
| */ |
| JNIEXPORT void JNICALL Java_com_apple_concurrent_LibDispatchNative_nativeExecuteSync |
| (JNIEnv *env, jclass clazz, jlong nativeQueue, jobject runnable) |
| { |
| // blocks until the Runnable completes |
| perform_dispatch(env, nativeQueue, runnable, dispatch_sync); |
| } |