Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "InputChannel-JNI" |
| 18 | |
| 19 | #include "JNIHelp.h" |
| 20 | |
| 21 | #include <android_runtime/AndroidRuntime.h> |
| 22 | #include <binder/Parcel.h> |
| 23 | #include <utils/Log.h> |
| 24 | #include <ui/InputTransport.h> |
| 25 | #include "android_view_InputChannel.h" |
| 26 | #include "android_util_Binder.h" |
| 27 | |
| 28 | namespace android { |
| 29 | |
| 30 | // ---------------------------------------------------------------------------- |
| 31 | |
| 32 | static struct { |
| 33 | jclass clazz; |
| 34 | |
| 35 | jfieldID mPtr; // native object attached to the DVM InputChannel |
| 36 | jmethodID ctor; |
| 37 | } gInputChannelClassInfo; |
| 38 | |
| 39 | // ---------------------------------------------------------------------------- |
| 40 | |
| 41 | class NativeInputChannel { |
| 42 | public: |
| 43 | NativeInputChannel(const sp<InputChannel>& inputChannel); |
| 44 | ~NativeInputChannel(); |
| 45 | |
| 46 | inline sp<InputChannel> getInputChannel() { return mInputChannel; } |
| 47 | |
| 48 | void setDisposeCallback(InputChannelObjDisposeCallback callback, void* data); |
| 49 | void invokeAndRemoveDisposeCallback(JNIEnv* env, jobject obj); |
| 50 | |
| 51 | private: |
| 52 | sp<InputChannel> mInputChannel; |
| 53 | InputChannelObjDisposeCallback mDisposeCallback; |
| 54 | void* mDisposeData; |
| 55 | }; |
| 56 | |
| 57 | // ---------------------------------------------------------------------------- |
| 58 | |
| 59 | NativeInputChannel::NativeInputChannel(const sp<InputChannel>& inputChannel) : |
| 60 | mInputChannel(inputChannel), mDisposeCallback(NULL) { |
| 61 | } |
| 62 | |
| 63 | NativeInputChannel::~NativeInputChannel() { |
| 64 | } |
| 65 | |
| 66 | void NativeInputChannel::setDisposeCallback(InputChannelObjDisposeCallback callback, void* data) { |
| 67 | mDisposeCallback = callback; |
| 68 | mDisposeData = data; |
| 69 | } |
| 70 | |
| 71 | void NativeInputChannel::invokeAndRemoveDisposeCallback(JNIEnv* env, jobject obj) { |
| 72 | if (mDisposeCallback) { |
| 73 | mDisposeCallback(env, obj, mInputChannel, mDisposeData); |
| 74 | mDisposeCallback = NULL; |
| 75 | mDisposeData = NULL; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | // ---------------------------------------------------------------------------- |
| 80 | |
| 81 | static NativeInputChannel* android_view_InputChannel_getNativeInputChannel(JNIEnv* env, |
| 82 | jobject inputChannelObj) { |
| 83 | jint intPtr = env->GetIntField(inputChannelObj, gInputChannelClassInfo.mPtr); |
| 84 | return reinterpret_cast<NativeInputChannel*>(intPtr); |
| 85 | } |
| 86 | |
| 87 | static void android_view_InputChannel_setNativeInputChannel(JNIEnv* env, jobject inputChannelObj, |
| 88 | NativeInputChannel* nativeInputChannel) { |
| 89 | env->SetIntField(inputChannelObj, gInputChannelClassInfo.mPtr, |
| 90 | reinterpret_cast<jint>(nativeInputChannel)); |
| 91 | } |
| 92 | |
| 93 | sp<InputChannel> android_view_InputChannel_getInputChannel(JNIEnv* env, jobject inputChannelObj) { |
| 94 | NativeInputChannel* nativeInputChannel = |
| 95 | android_view_InputChannel_getNativeInputChannel(env, inputChannelObj); |
| 96 | return nativeInputChannel != NULL ? nativeInputChannel->getInputChannel() : NULL; |
| 97 | } |
| 98 | |
| 99 | void android_view_InputChannel_setDisposeCallback(JNIEnv* env, jobject inputChannelObj, |
| 100 | InputChannelObjDisposeCallback callback, void* data) { |
| 101 | NativeInputChannel* nativeInputChannel = |
| 102 | android_view_InputChannel_getNativeInputChannel(env, inputChannelObj); |
| 103 | if (nativeInputChannel == NULL) { |
| 104 | LOGW("Cannot set dispose callback because input channel object has not been initialized."); |
| 105 | } else { |
| 106 | nativeInputChannel->setDisposeCallback(callback, data); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | static jobject android_view_InputChannel_createInputChannel(JNIEnv* env, |
| 111 | NativeInputChannel* nativeInputChannel) { |
| 112 | jobject inputChannelObj = env->NewObject(gInputChannelClassInfo.clazz, |
| 113 | gInputChannelClassInfo.ctor); |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 114 | if (inputChannelObj) { |
| 115 | android_view_InputChannel_setNativeInputChannel(env, inputChannelObj, nativeInputChannel); |
| 116 | } |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 117 | return inputChannelObj; |
| 118 | } |
| 119 | |
| 120 | static jobjectArray android_view_InputChannel_nativeOpenInputChannelPair(JNIEnv* env, |
| 121 | jclass clazz, jstring nameObj) { |
| 122 | const char* nameChars = env->GetStringUTFChars(nameObj, NULL); |
| 123 | String8 name(nameChars); |
| 124 | env->ReleaseStringUTFChars(nameObj, nameChars); |
| 125 | |
Jeff Brown | 5c225b1 | 2010-06-16 01:53:36 -0700 | [diff] [blame] | 126 | sp<InputChannel> serverChannel; |
| 127 | sp<InputChannel> clientChannel; |
| 128 | status_t result = InputChannel::openInputChannelPair(name, serverChannel, clientChannel); |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 129 | |
| 130 | if (result) { |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 131 | String8 message; |
| 132 | message.appendFormat("Could not open input channel pair. status=%d", result); |
| 133 | jniThrowRuntimeException(env, message.string()); |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 134 | return NULL; |
| 135 | } |
| 136 | |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 137 | jobjectArray channelPair = env->NewObjectArray(2, gInputChannelClassInfo.clazz, NULL); |
| 138 | if (env->ExceptionCheck()) { |
| 139 | return NULL; |
| 140 | } |
| 141 | |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 142 | jobject serverChannelObj = android_view_InputChannel_createInputChannel(env, |
| 143 | new NativeInputChannel(serverChannel)); |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 144 | if (env->ExceptionCheck()) { |
| 145 | return NULL; |
| 146 | } |
| 147 | |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 148 | jobject clientChannelObj = android_view_InputChannel_createInputChannel(env, |
| 149 | new NativeInputChannel(clientChannel)); |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 150 | if (env->ExceptionCheck()) { |
| 151 | return NULL; |
| 152 | } |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 153 | |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 154 | env->SetObjectArrayElement(channelPair, 0, serverChannelObj); |
| 155 | env->SetObjectArrayElement(channelPair, 1, clientChannelObj); |
| 156 | return channelPair; |
| 157 | } |
| 158 | |
| 159 | static void android_view_InputChannel_nativeDispose(JNIEnv* env, jobject obj, jboolean finalized) { |
| 160 | NativeInputChannel* nativeInputChannel = |
| 161 | android_view_InputChannel_getNativeInputChannel(env, obj); |
| 162 | if (nativeInputChannel) { |
| 163 | if (finalized) { |
| 164 | LOGW("Input channel object '%s' was finalized without being disposed!", |
| 165 | nativeInputChannel->getInputChannel()->getName().string()); |
| 166 | } |
| 167 | |
| 168 | nativeInputChannel->invokeAndRemoveDisposeCallback(env, obj); |
| 169 | |
| 170 | android_view_InputChannel_setNativeInputChannel(env, obj, NULL); |
| 171 | delete nativeInputChannel; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | static void android_view_InputChannel_nativeTransferTo(JNIEnv* env, jobject obj, |
| 176 | jobject otherObj) { |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 177 | if (android_view_InputChannel_getNativeInputChannel(env, otherObj) != NULL) { |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 178 | jniThrowException(env, "java/lang/IllegalStateException", |
| 179 | "Other object already has a native input channel."); |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | NativeInputChannel* nativeInputChannel = |
| 184 | android_view_InputChannel_getNativeInputChannel(env, obj); |
| 185 | android_view_InputChannel_setNativeInputChannel(env, otherObj, nativeInputChannel); |
| 186 | android_view_InputChannel_setNativeInputChannel(env, obj, NULL); |
| 187 | } |
| 188 | |
| 189 | static void android_view_InputChannel_nativeReadFromParcel(JNIEnv* env, jobject obj, |
| 190 | jobject parcelObj) { |
Jeff Brown | cc4f7db | 2011-08-30 20:34:48 -0700 | [diff] [blame^] | 191 | if (android_view_InputChannel_getNativeInputChannel(env, obj) != NULL) { |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 192 | jniThrowException(env, "java/lang/IllegalStateException", |
| 193 | "This object already has a native input channel."); |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | Parcel* parcel = parcelForJavaObject(env, parcelObj); |
| 198 | if (parcel) { |
| 199 | bool isInitialized = parcel->readInt32(); |
| 200 | if (isInitialized) { |
| 201 | String8 name = parcel->readString8(); |
Jeff Brown | 02cafc9 | 2011-02-26 15:39:12 -0800 | [diff] [blame] | 202 | int32_t parcelAshmemFd = parcel->readFileDescriptor(); |
| 203 | int32_t ashmemFd = dup(parcelAshmemFd); |
| 204 | if (ashmemFd < 0) { |
| 205 | LOGE("Error %d dup ashmem fd %d.", errno, parcelAshmemFd); |
| 206 | } |
| 207 | int32_t parcelReceivePipeFd = parcel->readFileDescriptor(); |
| 208 | int32_t receivePipeFd = dup(parcelReceivePipeFd); |
| 209 | if (receivePipeFd < 0) { |
| 210 | LOGE("Error %d dup receive pipe fd %d.", errno, parcelReceivePipeFd); |
| 211 | } |
| 212 | int32_t parcelSendPipeFd = parcel->readFileDescriptor(); |
| 213 | int32_t sendPipeFd = dup(parcelSendPipeFd); |
| 214 | if (sendPipeFd < 0) { |
| 215 | LOGE("Error %d dup send pipe fd %d.", errno, parcelSendPipeFd); |
| 216 | } |
Jeff Brown | 46b9ac0 | 2010-04-22 18:58:52 -0700 | [diff] [blame] | 217 | if (ashmemFd < 0 || receivePipeFd < 0 || sendPipeFd < 0) { |
| 218 | if (ashmemFd >= 0) ::close(ashmemFd); |
| 219 | if (receivePipeFd >= 0) ::close(receivePipeFd); |
| 220 | if (sendPipeFd >= 0) ::close(sendPipeFd); |
| 221 | jniThrowRuntimeException(env, |
| 222 | "Could not read input channel file descriptors from parcel."); |
| 223 | return; |
| 224 | } |
| 225 | |
| 226 | InputChannel* inputChannel = new InputChannel(name, ashmemFd, |
| 227 | receivePipeFd, sendPipeFd); |
| 228 | NativeInputChannel* nativeInputChannel = new NativeInputChannel(inputChannel); |
| 229 | |
| 230 | android_view_InputChannel_setNativeInputChannel(env, obj, nativeInputChannel); |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | static void android_view_InputChannel_nativeWriteToParcel(JNIEnv* env, jobject obj, |
| 236 | jobject parcelObj) { |
| 237 | Parcel* parcel = parcelForJavaObject(env, parcelObj); |
| 238 | if (parcel) { |
| 239 | NativeInputChannel* nativeInputChannel = |
| 240 | android_view_InputChannel_getNativeInputChannel(env, obj); |
| 241 | if (nativeInputChannel) { |
| 242 | sp<InputChannel> inputChannel = nativeInputChannel->getInputChannel(); |
| 243 | |
| 244 | parcel->writeInt32(1); |
| 245 | parcel->writeString8(inputChannel->getName()); |
| 246 | parcel->writeDupFileDescriptor(inputChannel->getAshmemFd()); |
| 247 | parcel->writeDupFileDescriptor(inputChannel->getReceivePipeFd()); |
| 248 | parcel->writeDupFileDescriptor(inputChannel->getSendPipeFd()); |
| 249 | } else { |
| 250 | parcel->writeInt32(0); |
| 251 | } |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | static jstring android_view_InputChannel_nativeGetName(JNIEnv* env, jobject obj) { |
| 256 | NativeInputChannel* nativeInputChannel = |
| 257 | android_view_InputChannel_getNativeInputChannel(env, obj); |
| 258 | if (! nativeInputChannel) { |
| 259 | return NULL; |
| 260 | } |
| 261 | |
| 262 | jstring name = env->NewStringUTF(nativeInputChannel->getInputChannel()->getName().string()); |
| 263 | return name; |
| 264 | } |
| 265 | |
| 266 | // ---------------------------------------------------------------------------- |
| 267 | |
| 268 | static JNINativeMethod gInputChannelMethods[] = { |
| 269 | /* name, signature, funcPtr */ |
| 270 | { "nativeOpenInputChannelPair", "(Ljava/lang/String;)[Landroid/view/InputChannel;", |
| 271 | (void*)android_view_InputChannel_nativeOpenInputChannelPair }, |
| 272 | { "nativeDispose", "(Z)V", |
| 273 | (void*)android_view_InputChannel_nativeDispose }, |
| 274 | { "nativeTransferTo", "(Landroid/view/InputChannel;)V", |
| 275 | (void*)android_view_InputChannel_nativeTransferTo }, |
| 276 | { "nativeReadFromParcel", "(Landroid/os/Parcel;)V", |
| 277 | (void*)android_view_InputChannel_nativeReadFromParcel }, |
| 278 | { "nativeWriteToParcel", "(Landroid/os/Parcel;)V", |
| 279 | (void*)android_view_InputChannel_nativeWriteToParcel }, |
| 280 | { "nativeGetName", "()Ljava/lang/String;", |
| 281 | (void*)android_view_InputChannel_nativeGetName }, |
| 282 | }; |
| 283 | |
| 284 | #define FIND_CLASS(var, className) \ |
| 285 | var = env->FindClass(className); \ |
| 286 | LOG_FATAL_IF(! var, "Unable to find class " className); \ |
| 287 | var = jclass(env->NewGlobalRef(var)); |
| 288 | |
| 289 | #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ |
| 290 | var = env->GetMethodID(clazz, methodName, methodDescriptor); \ |
| 291 | LOG_FATAL_IF(! var, "Unable to find method " methodName); |
| 292 | |
| 293 | #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \ |
| 294 | var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \ |
| 295 | LOG_FATAL_IF(! var, "Unable to find field " fieldName); |
| 296 | |
| 297 | int register_android_view_InputChannel(JNIEnv* env) { |
| 298 | int res = jniRegisterNativeMethods(env, "android/view/InputChannel", |
| 299 | gInputChannelMethods, NELEM(gInputChannelMethods)); |
| 300 | LOG_FATAL_IF(res < 0, "Unable to register native methods."); |
| 301 | |
| 302 | FIND_CLASS(gInputChannelClassInfo.clazz, "android/view/InputChannel"); |
| 303 | |
| 304 | GET_FIELD_ID(gInputChannelClassInfo.mPtr, gInputChannelClassInfo.clazz, |
| 305 | "mPtr", "I"); |
| 306 | |
| 307 | GET_METHOD_ID(gInputChannelClassInfo.ctor, gInputChannelClassInfo.clazz, |
| 308 | "<init>", "()V"); |
| 309 | |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | } // namespace android |