RenderScript.cpp revision e5428e661ce6f9d24f838cab0a8fb0fa8c76dbca
1/* 2 * Copyright (C) 2013 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#include <malloc.h> 18#include <string.h> 19#include <pthread.h> 20 21#include "RenderScript.h" 22#include "rsCppStructs.h" 23#include "rsCppInternal.h" 24 25#include <dlfcn.h> 26#include <unistd.h> 27 28#if !defined(RS_SERVER) && !defined(RS_COMPATIBILITY_LIB) && defined(HAVE_ANDROID_OS) 29#include <cutils/properties.h> 30#else 31#include "rsCompatibilityLib.h" 32#endif 33 34 35using namespace android; 36using namespace RSC; 37 38bool RS::gInitialized = false; 39bool RS::usingNative = false; 40pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER; 41dispatchTable* RS::dispatch = nullptr; 42static int gInitError = 0; 43 44RS::RS() { 45 mDev = nullptr; 46 mContext = nullptr; 47 mErrorFunc = nullptr; 48 mMessageFunc = nullptr; 49 mMessageRun = false; 50 mInit = false; 51 mCurrentError = RS_SUCCESS; 52 53 memset(&mElements, 0, sizeof(mElements)); 54 memset(&mSamplers, 0, sizeof(mSamplers)); 55} 56 57RS::~RS() { 58 if (mInit == true) { 59 mMessageRun = false; 60 61 if (mContext) { 62 RS::dispatch->ContextDeinitToClient(mContext); 63 64 void *res = nullptr; 65 int status = pthread_join(mMessageThreadId, &res); 66 67 RS::dispatch->ContextDestroy(mContext); 68 mContext = nullptr; 69 } 70 if (mDev) { 71 RS::dispatch->DeviceDestroy(mDev); 72 mDev = nullptr; 73 } 74 } 75} 76 77bool RS::init(std::string name, uint32_t flags) { 78 return RS::init(name, RS_VERSION, flags); 79} 80 81// this will only open API 19+ libRS 82// because that's when we changed libRS to extern "C" entry points 83static bool loadSO(const char* filename, int targetApi) { 84 void* handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL); 85 if (handle == nullptr) { 86 ALOGV("couldn't dlopen %s, %s", filename, dlerror()); 87 return false; 88 } 89 90 if (loadSymbols(handle, *RS::dispatch, targetApi) == false) { 91 ALOGV("%s init failed!", filename); 92 return false; 93 } 94 //ALOGE("Successfully loaded %s", filename); 95 return true; 96} 97 98static uint32_t getProp(const char *str) { 99#if !defined(__LP64__) && !defined(RS_SERVER) && defined(HAVE_ANDROID_OS) 100 char buf[256]; 101 property_get(str, buf, "0"); 102 return atoi(buf); 103#else 104 return 0; 105#endif 106} 107 108bool RS::initDispatch(int targetApi) { 109 pthread_mutex_lock(&gInitMutex); 110 if (gInitError) { 111 goto error; 112 } else if (gInitialized) { 113 pthread_mutex_unlock(&gInitMutex); 114 return true; 115 } 116 117 RS::dispatch = new dispatchTable; 118 119 // attempt to load libRS, load libRSSupport on failure 120 // if property is set, proceed directly to libRSSupport 121 if (getProp("debug.rs.forcecompat") == 0) { 122 usingNative = loadSO("libRS.so", targetApi); 123 } 124 if (usingNative == false) { 125 if (loadSO("libRSSupport.so", targetApi) == false) { 126 ALOGE("Failed to load libRS.so and libRSSupport.so"); 127 goto error; 128 } 129 } 130 131 gInitialized = true; 132 133 pthread_mutex_unlock(&gInitMutex); 134 return true; 135 136 error: 137 gInitError = 1; 138 pthread_mutex_unlock(&gInitMutex); 139 return false; 140} 141 142bool RS::init(std::string &name, int targetApi, uint32_t flags) { 143 if (mInit) { 144 return true; 145 } 146 147 if (initDispatch(targetApi) == false) { 148 ALOGE("Couldn't initialize dispatch table"); 149 return false; 150 } 151 152 mCacheDir = name; 153 154 mDev = RS::dispatch->DeviceCreate(); 155 if (mDev == 0) { 156 ALOGE("Device creation failed"); 157 return false; 158 } 159 160 if (flags & ~(RS_CONTEXT_SYNCHRONOUS | RS_CONTEXT_LOW_LATENCY | 161 RS_CONTEXT_LOW_POWER)) { 162 ALOGE("Invalid flags passed"); 163 return false; 164 } 165 166 mContext = RS::dispatch->ContextCreate(mDev, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags); 167 if (mContext == 0) { 168 ALOGE("Context creation failed"); 169 return false; 170 } 171 172 pid_t mNativeMessageThreadId; 173 174 int status = pthread_create(&mMessageThreadId, nullptr, threadProc, this); 175 if (status) { 176 ALOGE("Failed to start RS message thread."); 177 return false; 178 } 179 // Wait for the message thread to be active. 180 while (!mMessageRun) { 181 usleep(1000); 182 } 183 184 mInit = true; 185 186 return true; 187} 188 189void RS::throwError(RSError error, const char *errMsg) { 190 if (mCurrentError == RS_SUCCESS) { 191 mCurrentError = error; 192 ALOGE("RS CPP error: %s", errMsg); 193 } else { 194 ALOGE("RS CPP error (masked by previous error): %s", errMsg); 195 } 196} 197 198RSError RS::getError() { 199 return mCurrentError; 200} 201 202 203void * RS::threadProc(void *vrsc) { 204 RS *rs = static_cast<RS *>(vrsc); 205 size_t rbuf_size = 256; 206 void * rbuf = malloc(rbuf_size); 207 208 RS::dispatch->ContextInitToClient(rs->mContext); 209 rs->mMessageRun = true; 210 211 while (rs->mMessageRun) { 212 size_t receiveLen = 0; 213 uint32_t usrID = 0; 214 uint32_t subID = 0; 215 RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext, 216 &receiveLen, sizeof(receiveLen), 217 &usrID, sizeof(usrID)); 218 219 if (receiveLen >= rbuf_size) { 220 rbuf_size = receiveLen + 32; 221 rbuf = realloc(rbuf, rbuf_size); 222 } 223 if (!rbuf) { 224 ALOGE("RS::message handler realloc error %zu", rbuf_size); 225 // No clean way to recover now? 226 } 227 RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen), 228 &subID, sizeof(subID)); 229 230 switch(r) { 231 case RS_MESSAGE_TO_CLIENT_ERROR: 232 ALOGE("RS Error %s", (const char *)rbuf); 233 rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime"); 234 if(rs->mMessageFunc != nullptr) { 235 rs->mErrorFunc(usrID, (const char *)rbuf); 236 } 237 break; 238 case RS_MESSAGE_TO_CLIENT_NONE: 239 case RS_MESSAGE_TO_CLIENT_EXCEPTION: 240 case RS_MESSAGE_TO_CLIENT_RESIZE: 241 // teardown. But we want to avoid starving other threads during 242 // teardown by yielding until the next line in the destructor can 243 // execute to set mRun = false. Note that the FIFO sends an 244 // empty NONE message when it reaches its destructor. 245 usleep(1000); 246 break; 247 case RS_MESSAGE_TO_CLIENT_USER: 248 if(rs->mMessageFunc != nullptr) { 249 rs->mMessageFunc(usrID, rbuf, receiveLen); 250 } else { 251 ALOGE("Received a message from the script with no message handler installed."); 252 } 253 break; 254 255 default: 256 ALOGE("RS unknown message type %i", r); 257 } 258 } 259 260 if (rbuf) { 261 free(rbuf); 262 } 263 ALOGV("RS Message thread exiting."); 264 return nullptr; 265} 266 267void RS::setErrorHandler(ErrorHandlerFunc_t func) { 268 mErrorFunc = func; 269} 270 271void RS::setMessageHandler(MessageHandlerFunc_t func) { 272 mMessageFunc = func; 273} 274 275void RS::finish() { 276 RS::dispatch->ContextFinish(mContext); 277} 278