159 lines
5.2 KiB
C++
159 lines
5.2 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "MessageQueue-JNI"
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#include "JNIHelp.h"
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#include <utils/Looper.h>
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#include <utils/Log.h>
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#include "android_os_MessageQueue.h"
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namespace android {
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// ----------------------------------------------------------------------------
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static struct {
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jclass clazz;
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jfieldID mPtr; // native object attached to the DVM MessageQueue
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} gMessageQueueClassInfo;
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// ----------------------------------------------------------------------------
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class NativeMessageQueue {
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public:
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NativeMessageQueue();
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~NativeMessageQueue();
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inline sp<Looper> getLooper() { return mLooper; }
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void pollOnce(int timeoutMillis);
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void wake();
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private:
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sp<Looper> mLooper;
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};
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// ----------------------------------------------------------------------------
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NativeMessageQueue::NativeMessageQueue() {
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mLooper = Looper::getForThread();
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if (mLooper == NULL) {
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mLooper = new Looper(false);
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Looper::setForThread(mLooper);
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}
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}
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NativeMessageQueue::~NativeMessageQueue() {
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}
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void NativeMessageQueue::pollOnce(int timeoutMillis) {
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mLooper->pollOnce(timeoutMillis);
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}
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void NativeMessageQueue::wake() {
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mLooper->wake();
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}
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// ----------------------------------------------------------------------------
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static NativeMessageQueue* android_os_MessageQueue_getNativeMessageQueue(JNIEnv* env,
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jobject messageQueueObj) {
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jint intPtr = env->GetIntField(messageQueueObj, gMessageQueueClassInfo.mPtr);
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return reinterpret_cast<NativeMessageQueue*>(intPtr);
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}
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static void android_os_MessageQueue_setNativeMessageQueue(JNIEnv* env, jobject messageQueueObj,
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NativeMessageQueue* nativeMessageQueue) {
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env->SetIntField(messageQueueObj, gMessageQueueClassInfo.mPtr,
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reinterpret_cast<jint>(nativeMessageQueue));
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}
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sp<Looper> android_os_MessageQueue_getLooper(JNIEnv* env, jobject messageQueueObj) {
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NativeMessageQueue* nativeMessageQueue =
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android_os_MessageQueue_getNativeMessageQueue(env, messageQueueObj);
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return nativeMessageQueue != NULL ? nativeMessageQueue->getLooper() : NULL;
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}
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static void android_os_MessageQueue_nativeInit(JNIEnv* env, jobject obj) {
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NativeMessageQueue* nativeMessageQueue = new NativeMessageQueue();
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if (! nativeMessageQueue) {
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jniThrowRuntimeException(env, "Unable to allocate native queue");
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return;
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}
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android_os_MessageQueue_setNativeMessageQueue(env, obj, nativeMessageQueue);
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}
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static void android_os_MessageQueue_nativeDestroy(JNIEnv* env, jobject obj) {
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NativeMessageQueue* nativeMessageQueue =
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android_os_MessageQueue_getNativeMessageQueue(env, obj);
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if (nativeMessageQueue) {
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android_os_MessageQueue_setNativeMessageQueue(env, obj, NULL);
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delete nativeMessageQueue;
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}
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}
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static void throwQueueNotInitialized(JNIEnv* env) {
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jniThrowException(env, "java/lang/IllegalStateException", "Message queue not initialized");
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}
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static void android_os_MessageQueue_nativePollOnce(JNIEnv* env, jobject obj,
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jint ptr, jint timeoutMillis) {
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NativeMessageQueue* nativeMessageQueue = reinterpret_cast<NativeMessageQueue*>(ptr);
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nativeMessageQueue->pollOnce(timeoutMillis);
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}
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static void android_os_MessageQueue_nativeWake(JNIEnv* env, jobject obj, jint ptr) {
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NativeMessageQueue* nativeMessageQueue = reinterpret_cast<NativeMessageQueue*>(ptr);
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return nativeMessageQueue->wake();
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}
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// ----------------------------------------------------------------------------
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static JNINativeMethod gMessageQueueMethods[] = {
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/* name, signature, funcPtr */
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{ "nativeInit", "()V", (void*)android_os_MessageQueue_nativeInit },
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{ "nativeDestroy", "()V", (void*)android_os_MessageQueue_nativeDestroy },
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{ "nativePollOnce", "(II)V", (void*)android_os_MessageQueue_nativePollOnce },
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{ "nativeWake", "(I)V", (void*)android_os_MessageQueue_nativeWake }
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};
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#define FIND_CLASS(var, className) \
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var = env->FindClass(className); \
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LOG_FATAL_IF(! var, "Unable to find class " className); \
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var = jclass(env->NewGlobalRef(var));
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#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
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var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
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LOG_FATAL_IF(! var, "Unable to find field " fieldName);
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int register_android_os_MessageQueue(JNIEnv* env) {
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int res = jniRegisterNativeMethods(env, "android/os/MessageQueue",
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gMessageQueueMethods, NELEM(gMessageQueueMethods));
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LOG_FATAL_IF(res < 0, "Unable to register native methods.");
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FIND_CLASS(gMessageQueueClassInfo.clazz, "android/os/MessageQueue");
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GET_FIELD_ID(gMessageQueueClassInfo.mPtr, gMessageQueueClassInfo.clazz,
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"mPtr", "I");
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return 0;
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}
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} // namespace android
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