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 using android::RSC::RS;
29 using android::RSC::RSError;
30
31 bool RS::gInitialized = false;
32 bool RS::usingNative = false;
33 pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
34 dispatchTable* RS::dispatch = nullptr;
35 static int gInitError = 0;
36
RS()37 RS::RS() {
38 mContext = nullptr;
39 mErrorFunc = nullptr;
40 mMessageFunc = nullptr;
41 mMessageRun = false;
42 mInit = false;
43 mCurrentError = RS_SUCCESS;
44
45 memset(&mElements, 0, sizeof(mElements));
46 memset(&mSamplers, 0, sizeof(mSamplers));
47 }
48
~RS()49 RS::~RS() {
50 if (mInit == true) {
51 mMessageRun = false;
52
53 if (mContext) {
54 finish();
55 RS::dispatch->ContextDeinitToClient(mContext);
56
57 void *res = nullptr;
58 pthread_join(mMessageThreadId, &res);
59
60 RS::dispatch->ContextDestroy(mContext);
61 mContext = nullptr;
62 }
63 }
64 }
65
init(const char * name,uint32_t flags)66 bool RS::init(const char * name, uint32_t flags) {
67 return RS::init(name, flags, 0);
68 }
69
70 // This will only open API 19+ libRS, because that's when
71 // we changed libRS to extern "C" entry points.
loadSO(const char * filename,int targetApi)72 static bool loadSO(const char* filename, int targetApi) {
73 void* handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
74 if (handle == nullptr) {
75 ALOGV("couldn't dlopen %s, %s", filename, dlerror());
76 return false;
77 }
78
79 if (loadSymbols(handle, *RS::dispatch, targetApi) == false) {
80 ALOGV("%s init failed!", filename);
81 return false;
82 }
83 return true;
84 }
85
getProp(const char * str)86 static uint32_t getProp(const char *str) {
87 #if !defined(__LP64__) && defined(__ANDROID__)
88 char buf[256];
89 android::renderscript::property_get(str, buf, "0");
90 return atoi(buf);
91 #else
92 return 0;
93 #endif
94 }
95
initDispatch(int targetApi)96 bool RS::initDispatch(int targetApi) {
97 pthread_mutex_lock(&gInitMutex);
98 if (gInitError) {
99 goto error;
100 } else if (gInitialized) {
101 pthread_mutex_unlock(&gInitMutex);
102 return true;
103 }
104
105 RS::dispatch = new dispatchTable;
106
107 // Attempt to load libRS, load libRSSupport on failure.
108 // If property is set, proceed directly to libRSSupport.
109 if (getProp("debug.rs.forcecompat") == 0) {
110 usingNative = loadSO("libRS.so", targetApi);
111 }
112 if (usingNative == false) {
113 if (loadSO("libRSSupport.so", targetApi) == false) {
114 ALOGE("Failed to load libRS.so and libRSSupport.so");
115 goto error;
116 }
117 }
118
119 gInitialized = true;
120
121 pthread_mutex_unlock(&gInitMutex);
122 return true;
123
124 error:
125 gInitError = 1;
126 pthread_mutex_unlock(&gInitMutex);
127 return false;
128 }
129
init(const char * name,uint32_t flags,int targetApi)130 bool RS::init(const char * name, uint32_t flags, int targetApi) {
131 if (mInit) {
132 return true;
133 }
134 // When using default value 0, set targetApi to RS_VERSION,
135 // to preserve the behavior of existing apps.
136 if (targetApi == 0) {
137 targetApi = RS_VERSION;
138 }
139
140 if (initDispatch(targetApi) == false) {
141 ALOGE("Couldn't initialize dispatch table");
142 return false;
143 }
144
145 uint32_t nameLen = strlen(name);
146 if (nameLen > PATH_MAX) {
147 ALOGE("The path to the cache directory is too long");
148 return false;
149 }
150 memcpy(mCacheDir, name, nameLen);
151 // Add the null character even if the user does not.
152 mCacheDir[nameLen] = 0;
153 mCacheDirLen = nameLen + 1;
154
155 RsDevice device = RS::dispatch->DeviceCreate();
156 if (device == 0) {
157 ALOGE("Device creation failed");
158 return false;
159 }
160
161 if (flags & ~(RS_CONTEXT_SYNCHRONOUS | RS_CONTEXT_LOW_LATENCY |
162 RS_CONTEXT_LOW_POWER | RS_CONTEXT_WAIT_FOR_ATTACH)) {
163 ALOGE("Invalid flags passed");
164 return false;
165 }
166
167 mContext = RS::dispatch->ContextCreate(device, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags);
168 if (mContext == 0) {
169 ALOGE("Context creation failed");
170 return false;
171 }
172
173 pid_t mNativeMessageThreadId;
174
175 int status = pthread_create(&mMessageThreadId, nullptr, threadProc, this);
176 if (status) {
177 ALOGE("Failed to start RS message thread.");
178 return false;
179 }
180 // Wait for the message thread to be active.
181 while (!mMessageRun) {
182 usleep(1000);
183 }
184
185 mInit = true;
186
187 return true;
188 }
189
throwError(RSError error,const char * errMsg)190 void RS::throwError(RSError error, const char *errMsg) {
191 if (mCurrentError == RS_SUCCESS) {
192 mCurrentError = error;
193 ALOGE("RS CPP error: %s", errMsg);
194 } else {
195 ALOGE("RS CPP error (masked by previous error): %s", errMsg);
196 }
197 }
198
getError()199 RSError RS::getError() {
200 return mCurrentError;
201 }
202
203
threadProc(void * vrsc)204 void * RS::threadProc(void *vrsc) {
205 RS *rs = static_cast<RS *>(vrsc);
206 size_t rbuf_size = 256;
207 void * rbuf = malloc(rbuf_size);
208
209 RS::dispatch->ContextInitToClient(rs->mContext);
210 rs->mMessageRun = true;
211
212 while (rs->mMessageRun) {
213 size_t receiveLen = 0;
214 uint32_t usrID = 0;
215 uint32_t subID = 0;
216 RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
217 &receiveLen, sizeof(receiveLen),
218 &usrID, sizeof(usrID));
219
220 if (receiveLen >= rbuf_size) {
221 rbuf_size = receiveLen + 32;
222 void *tmpBuf = realloc(rbuf, rbuf_size);
223 if (tmpBuf) {
224 rbuf = tmpBuf;
225 } else {
226 free(rbuf);
227 rbuf = NULL;
228 }
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 /*
249 * Teardown. We want to avoid starving other threads during
250 * teardown by yielding until the next line in the destructor can
251 * execute to set mRun = false. Note that the FIFO sends an
252 * empty NONE message when it reaches its destructor.
253 */
254 usleep(1000);
255 break;
256 case RS_MESSAGE_TO_CLIENT_USER:
257 if(rs->mMessageFunc != nullptr) {
258 rs->mMessageFunc(usrID, rbuf, receiveLen);
259 } else {
260 ALOGE("Received a message from the script with no message handler installed.");
261 }
262 break;
263
264 default:
265 ALOGE("RS unknown message type %i", r);
266 }
267 }
268
269 if (rbuf) {
270 free(rbuf);
271 }
272 ALOGV("RS Message thread exiting.");
273 return nullptr;
274 }
275
setErrorHandler(ErrorHandlerFunc_t func)276 void RS::setErrorHandler(ErrorHandlerFunc_t func) {
277 mErrorFunc = func;
278 }
279
setMessageHandler(MessageHandlerFunc_t func)280 void RS::setMessageHandler(MessageHandlerFunc_t func) {
281 mMessageFunc = func;
282 }
283
finish()284 void RS::finish() {
285 RS::dispatch->ContextFinish(mContext);
286 }
287