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(__ANDROID__)
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 mContext = nullptr;
46 mErrorFunc = nullptr;
47 mMessageFunc = nullptr;
48 mMessageRun = false;
49 mInit = false;
50 mCurrentError = RS_SUCCESS;
51
52 memset(&mElements, 0, sizeof(mElements));
53 memset(&mSamplers, 0, sizeof(mSamplers));
54 }
55
~RS()56 RS::~RS() {
57 if (mInit == true) {
58 mMessageRun = false;
59
60 if (mContext) {
61 finish();
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 }
71 }
72
init(const char * name,uint32_t flags)73 bool RS::init(const char * name, uint32_t flags) {
74 return RS::init(name, flags, 0);
75 }
76
77 // This will only open API 19+ libRS, because that's when
78 // we changed libRS to extern "C" entry points.
loadSO(const char * filename,int targetApi)79 static bool loadSO(const char* filename, int targetApi) {
80 void* handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
81 if (handle == nullptr) {
82 ALOGV("couldn't dlopen %s, %s", filename, dlerror());
83 return false;
84 }
85
86 if (loadSymbols(handle, *RS::dispatch, targetApi) == false) {
87 ALOGV("%s init failed!", filename);
88 return false;
89 }
90 return true;
91 }
92
getProp(const char * str)93 static uint32_t getProp(const char *str) {
94 #if !defined(__LP64__) && !defined(RS_SERVER) && defined(__ANDROID__)
95 char buf[256];
96 property_get(str, buf, "0");
97 return atoi(buf);
98 #else
99 return 0;
100 #endif
101 }
102
initDispatch(int targetApi)103 bool RS::initDispatch(int targetApi) {
104 pthread_mutex_lock(&gInitMutex);
105 if (gInitError) {
106 goto error;
107 } else if (gInitialized) {
108 pthread_mutex_unlock(&gInitMutex);
109 return true;
110 }
111
112 RS::dispatch = new dispatchTable;
113
114 // Attempt to load libRS, load libRSSupport on failure.
115 // If property is set, proceed directly to libRSSupport.
116 if (getProp("debug.rs.forcecompat") == 0) {
117 usingNative = loadSO("libRS.so", targetApi);
118 }
119 if (usingNative == false) {
120 if (loadSO("libRSSupport.so", targetApi) == false) {
121 ALOGE("Failed to load libRS.so and libRSSupport.so");
122 goto error;
123 }
124 }
125
126 gInitialized = true;
127
128 pthread_mutex_unlock(&gInitMutex);
129 return true;
130
131 error:
132 gInitError = 1;
133 pthread_mutex_unlock(&gInitMutex);
134 return false;
135 }
136
init(const char * name,uint32_t flags,int targetApi)137 bool RS::init(const char * name, uint32_t flags, int targetApi) {
138 if (mInit) {
139 return true;
140 }
141 // When using default value 0, set targetApi to RS_VERSION,
142 // to preserve the behavior of existing apps.
143 if (targetApi == 0) {
144 targetApi = RS_VERSION;
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 // Add the null character even if the user does not.
159 mCacheDir[nameLen] = 0;
160 mCacheDirLen = nameLen + 1;
161
162 RsDevice device = RS::dispatch->DeviceCreate();
163 if (device == 0) {
164 ALOGE("Device creation failed");
165 return false;
166 }
167
168 if (flags & ~(RS_CONTEXT_SYNCHRONOUS | RS_CONTEXT_LOW_LATENCY |
169 RS_CONTEXT_LOW_POWER | RS_CONTEXT_WAIT_FOR_ATTACH)) {
170 ALOGE("Invalid flags passed");
171 return false;
172 }
173
174 mContext = RS::dispatch->ContextCreate(device, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags);
175 if (mContext == 0) {
176 ALOGE("Context creation failed");
177 return false;
178 }
179
180 pid_t mNativeMessageThreadId;
181
182 int status = pthread_create(&mMessageThreadId, nullptr, threadProc, this);
183 if (status) {
184 ALOGE("Failed to start RS message thread.");
185 return false;
186 }
187 // Wait for the message thread to be active.
188 while (!mMessageRun) {
189 usleep(1000);
190 }
191
192 mInit = true;
193
194 return true;
195 }
196
throwError(RSError error,const char * errMsg)197 void RS::throwError(RSError error, const char *errMsg) {
198 if (mCurrentError == RS_SUCCESS) {
199 mCurrentError = error;
200 ALOGE("RS CPP error: %s", errMsg);
201 } else {
202 ALOGE("RS CPP error (masked by previous error): %s", errMsg);
203 }
204 }
205
getError()206 RSError RS::getError() {
207 return mCurrentError;
208 }
209
210
threadProc(void * vrsc)211 void * RS::threadProc(void *vrsc) {
212 RS *rs = static_cast<RS *>(vrsc);
213 size_t rbuf_size = 256;
214 void * rbuf = malloc(rbuf_size);
215
216 RS::dispatch->ContextInitToClient(rs->mContext);
217 rs->mMessageRun = true;
218
219 while (rs->mMessageRun) {
220 size_t receiveLen = 0;
221 uint32_t usrID = 0;
222 uint32_t subID = 0;
223 RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
224 &receiveLen, sizeof(receiveLen),
225 &usrID, sizeof(usrID));
226
227 if (receiveLen >= rbuf_size) {
228 rbuf_size = receiveLen + 32;
229 rbuf = realloc(rbuf, rbuf_size);
230 }
231 if (!rbuf) {
232 ALOGE("RS::message handler realloc error %zu", rbuf_size);
233 // No clean way to recover now?
234 }
235 RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
236 &subID, sizeof(subID));
237
238 switch(r) {
239 case RS_MESSAGE_TO_CLIENT_ERROR:
240 ALOGE("RS Error %s", (const char *)rbuf);
241 rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime");
242 if(rs->mMessageFunc != nullptr) {
243 rs->mErrorFunc(usrID, (const char *)rbuf);
244 }
245 break;
246 case RS_MESSAGE_TO_CLIENT_NONE:
247 case RS_MESSAGE_TO_CLIENT_EXCEPTION:
248 case RS_MESSAGE_TO_CLIENT_RESIZE:
249 /*
250 * Teardown. We want to avoid starving other threads during
251 * teardown by yielding until the next line in the destructor can
252 * execute to set mRun = false. Note that the FIFO sends an
253 * empty NONE message when it reaches its destructor.
254 */
255 usleep(1000);
256 break;
257 case RS_MESSAGE_TO_CLIENT_USER:
258 if(rs->mMessageFunc != nullptr) {
259 rs->mMessageFunc(usrID, rbuf, receiveLen);
260 } else {
261 ALOGE("Received a message from the script with no message handler installed.");
262 }
263 break;
264
265 default:
266 ALOGE("RS unknown message type %i", r);
267 }
268 }
269
270 if (rbuf) {
271 free(rbuf);
272 }
273 ALOGV("RS Message thread exiting.");
274 return nullptr;
275 }
276
setErrorHandler(ErrorHandlerFunc_t func)277 void RS::setErrorHandler(ErrorHandlerFunc_t func) {
278 mErrorFunc = func;
279 }
280
setMessageHandler(MessageHandlerFunc_t func)281 void RS::setMessageHandler(MessageHandlerFunc_t func) {
282 mMessageFunc = func;
283 }
284
finish()285 void RS::finish() {
286 RS::dispatch->ContextFinish(mContext);
287 }
288