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
35 using namespace android;
36 using namespace RSC;
37
38 bool RS::gInitialized = false;
39 bool RS::usingNative = false;
40 pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
41 dispatchTable* RS::dispatch = nullptr;
42 static int gInitError = 0;
43
RS()44 RS::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
~RS()57 RS::~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
init(const char * name,uint32_t flags)77 bool RS::init(const char * 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
loadSO(const char * filename,int targetApi)83 static 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
getProp(const char * str)98 static 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
initDispatch(int targetApi)108 bool 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
init(const char * name,int targetApi,uint32_t flags)142 bool RS::init(const char * 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 uint32_t nameLen = strlen(name);
153 if (nameLen > PATH_MAX) {
154 ALOGE("The path to the cache directory is too long");
155 return false;
156 }
157 memcpy(mCacheDir, name, nameLen);
158 mCacheDir[nameLen] = 0; //add the null character even if the user does not.
159 mCacheDirLen = nameLen + 1;
160
161 mDev = RS::dispatch->DeviceCreate();
162 if (mDev == 0) {
163 ALOGE("Device creation failed");
164 return false;
165 }
166
167 if (flags & ~(RS_CONTEXT_SYNCHRONOUS | RS_CONTEXT_LOW_LATENCY |
168 RS_CONTEXT_LOW_POWER | RS_CONTEXT_WAIT_FOR_ATTACH)) {
169 ALOGE("Invalid flags passed");
170 return false;
171 }
172
173 mContext = RS::dispatch->ContextCreate(mDev, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags);
174 if (mContext == 0) {
175 ALOGE("Context creation failed");
176 return false;
177 }
178
179 pid_t mNativeMessageThreadId;
180
181 int status = pthread_create(&mMessageThreadId, nullptr, threadProc, this);
182 if (status) {
183 ALOGE("Failed to start RS message thread.");
184 return false;
185 }
186 // Wait for the message thread to be active.
187 while (!mMessageRun) {
188 usleep(1000);
189 }
190
191 mInit = true;
192
193 return true;
194 }
195
throwError(RSError error,const char * errMsg)196 void RS::throwError(RSError error, const char *errMsg) {
197 if (mCurrentError == RS_SUCCESS) {
198 mCurrentError = error;
199 ALOGE("RS CPP error: %s", errMsg);
200 } else {
201 ALOGE("RS CPP error (masked by previous error): %s", errMsg);
202 }
203 }
204
getError()205 RSError RS::getError() {
206 return mCurrentError;
207 }
208
209
threadProc(void * vrsc)210 void * RS::threadProc(void *vrsc) {
211 RS *rs = static_cast<RS *>(vrsc);
212 size_t rbuf_size = 256;
213 void * rbuf = malloc(rbuf_size);
214
215 RS::dispatch->ContextInitToClient(rs->mContext);
216 rs->mMessageRun = true;
217
218 while (rs->mMessageRun) {
219 size_t receiveLen = 0;
220 uint32_t usrID = 0;
221 uint32_t subID = 0;
222 RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
223 &receiveLen, sizeof(receiveLen),
224 &usrID, sizeof(usrID));
225
226 if (receiveLen >= rbuf_size) {
227 rbuf_size = receiveLen + 32;
228 rbuf = realloc(rbuf, rbuf_size);
229 }
230 if (!rbuf) {
231 ALOGE("RS::message handler realloc error %zu", rbuf_size);
232 // No clean way to recover now?
233 }
234 RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
235 &subID, sizeof(subID));
236
237 switch(r) {
238 case RS_MESSAGE_TO_CLIENT_ERROR:
239 ALOGE("RS Error %s", (const char *)rbuf);
240 rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime");
241 if(rs->mMessageFunc != nullptr) {
242 rs->mErrorFunc(usrID, (const char *)rbuf);
243 }
244 break;
245 case RS_MESSAGE_TO_CLIENT_NONE:
246 case RS_MESSAGE_TO_CLIENT_EXCEPTION:
247 case RS_MESSAGE_TO_CLIENT_RESIZE:
248 // teardown. But we want to avoid starving other threads during
249 // teardown by yielding until the next line in the destructor can
250 // execute to set mRun = false. Note that the FIFO sends an
251 // empty NONE message when it reaches its destructor.
252 usleep(1000);
253 break;
254 case RS_MESSAGE_TO_CLIENT_USER:
255 if(rs->mMessageFunc != nullptr) {
256 rs->mMessageFunc(usrID, rbuf, receiveLen);
257 } else {
258 ALOGE("Received a message from the script with no message handler installed.");
259 }
260 break;
261
262 default:
263 ALOGE("RS unknown message type %i", r);
264 }
265 }
266
267 if (rbuf) {
268 free(rbuf);
269 }
270 ALOGV("RS Message thread exiting.");
271 return nullptr;
272 }
273
setErrorHandler(ErrorHandlerFunc_t func)274 void RS::setErrorHandler(ErrorHandlerFunc_t func) {
275 mErrorFunc = func;
276 }
277
setMessageHandler(MessageHandlerFunc_t func)278 void RS::setMessageHandler(MessageHandlerFunc_t func) {
279 mMessageFunc = func;
280 }
281
finish()282 void RS::finish() {
283 RS::dispatch->ContextFinish(mContext);
284 }
285