RenderScript.cpp revision 75e877d157f9429eb6d8fb1b09c75c5472db161a 
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
27#if !defined(RS_SERVER) && defined(HAVE_ANDROID_OS)
28#include <cutils/properties.h>
29#endif
30
31using namespace android;
32using namespace RSC;
33
34bool RS::gInitialized = false;
35bool RS::usingNative = false;
36pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
37dispatchTable* RS::dispatch = NULL;
38static int gInitError = 0;
39
40RS::RS() {
41    mDev = NULL;
42    mContext = NULL;
43    mErrorFunc = NULL;
44    mMessageFunc = NULL;
45    mMessageRun = false;
46    mInit = false;
47    mCurrentError = RS_SUCCESS;
48
49    memset(&mElements, 0, sizeof(mElements));
50    memset(&mSamplers, 0, sizeof(mSamplers));
51}
52
53RS::~RS() {
54    if (mInit == true) {
55        mMessageRun = false;
56
57        RS::dispatch->ContextDeinitToClient(mContext);
58
59        void *res = NULL;
60        int status = pthread_join(mMessageThreadId, &res);
61
62        RS::dispatch->ContextDestroy(mContext);
63        mContext = NULL;
64        RS::dispatch->DeviceDestroy(mDev);
65        mDev = NULL;
66    }
67}
68
69bool RS::init(uint32_t flags) {
70    return RS::init(RS_VERSION, flags);
71}
72
73static bool loadSymbols(void* handle) {
74
75    RS::dispatch->AllocationGetType = (AllocationGetTypeFnPtr)dlsym(handle, "rsaAllocationGetType");
76    if (RS::dispatch->AllocationGetType == NULL) {
77        ALOGE("Couldn't initialize RS::dispatch->AllocationGetType");
78        return false;
79    }
80    RS::dispatch->TypeGetNativeData = (TypeGetNativeDataFnPtr)dlsym(handle, "rsaTypeGetNativeData");
81    if (RS::dispatch->TypeGetNativeData == NULL) {
82        ALOGE("Couldn't initialize RS::dispatch->TypeGetNativeData");
83        return false;
84    }
85    RS::dispatch->ElementGetNativeData = (ElementGetNativeDataFnPtr)dlsym(handle, "rsaElementGetNativeData");
86    if (RS::dispatch->ElementGetNativeData == NULL) {
87        ALOGE("Couldn't initialize RS::dispatch->ElementGetNativeData");
88        return false;
89    }
90    RS::dispatch->ElementGetSubElements = (ElementGetSubElementsFnPtr)dlsym(handle, "rsaElementGetSubElements");
91    if (RS::dispatch->ElementGetSubElements == NULL) {
92        ALOGE("Couldn't initialize RS::dispatch->ElementGetSubElements");
93        return false;
94    }
95    RS::dispatch->DeviceCreate = (DeviceCreateFnPtr)dlsym(handle, "rsDeviceCreate");
96    if (RS::dispatch->DeviceCreate == NULL) {
97        ALOGE("Couldn't initialize RS::dispatch->DeviceCreate");
98        return false;
99    }
100    RS::dispatch->DeviceDestroy = (DeviceDestroyFnPtr)dlsym(handle, "rsDeviceDestroy");
101    if (RS::dispatch->DeviceDestroy == NULL) {
102        ALOGE("Couldn't initialize RS::dispatch->DeviceDestroy");
103        return false;
104    }
105    RS::dispatch->DeviceSetConfig = (DeviceSetConfigFnPtr)dlsym(handle, "rsDeviceSetConfig");
106    if (RS::dispatch->DeviceSetConfig == NULL) {
107        ALOGE("Couldn't initialize RS::dispatch->DeviceSetConfig");
108        return false;
109    }
110    RS::dispatch->ContextCreate = (ContextCreateFnPtr)dlsym(handle, "rsContextCreate");;
111    if (RS::dispatch->ContextCreate == NULL) {
112        ALOGE("Couldn't initialize RS::dispatch->ContextCreate");
113        return false;
114    }
115    RS::dispatch->GetName = (GetNameFnPtr)dlsym(handle, "rsaGetName");;
116    if (RS::dispatch->GetName == NULL) {
117        ALOGE("Couldn't initialize RS::dispatch->GetName");
118        return false;
119    }
120    RS::dispatch->ContextDestroy = (ContextDestroyFnPtr)dlsym(handle, "rsContextDestroy");
121    if (RS::dispatch->ContextDestroy == NULL) {
122        ALOGE("Couldn't initialize RS::dispatch->ContextDestroy");
123        return false;
124    }
125    RS::dispatch->ContextGetMessage = (ContextGetMessageFnPtr)dlsym(handle, "rsContextGetMessage");
126    if (RS::dispatch->ContextGetMessage == NULL) {
127        ALOGE("Couldn't initialize RS::dispatch->ContextGetMessage");
128        return false;
129    }
130    RS::dispatch->ContextPeekMessage = (ContextPeekMessageFnPtr)dlsym(handle, "rsContextPeekMessage");
131    if (RS::dispatch->ContextPeekMessage == NULL) {
132        ALOGE("Couldn't initialize RS::dispatch->ContextPeekMessage");
133        return false;
134    }
135    RS::dispatch->ContextSendMessage = (ContextSendMessageFnPtr)dlsym(handle, "rsContextSendMessage");
136    if (RS::dispatch->ContextSendMessage == NULL) {
137        ALOGE("Couldn't initialize RS::dispatch->ContextSendMessage");
138        return false;
139    }
140    RS::dispatch->ContextInitToClient = (ContextInitToClientFnPtr)dlsym(handle, "rsContextInitToClient");
141    if (RS::dispatch->ContextInitToClient == NULL) {
142        ALOGE("Couldn't initialize RS::dispatch->ContextInitToClient");
143        return false;
144    }
145    RS::dispatch->ContextDeinitToClient = (ContextDeinitToClientFnPtr)dlsym(handle, "rsContextDeinitToClient");
146    if (RS::dispatch->ContextDeinitToClient == NULL) {
147        ALOGE("Couldn't initialize RS::dispatch->ContextDeinitToClient");
148        return false;
149    }
150    RS::dispatch->TypeCreate = (TypeCreateFnPtr)dlsym(handle, "rsTypeCreate");
151    if (RS::dispatch->TypeCreate == NULL) {
152        ALOGE("Couldn't initialize RS::dispatch->TypeCreate");
153        return false;
154    }
155    RS::dispatch->AllocationCreateTyped = (AllocationCreateTypedFnPtr)dlsym(handle, "rsAllocationCreateTyped");
156    if (RS::dispatch->AllocationCreateTyped == NULL) {
157        ALOGE("Couldn't initialize RS::dispatch->AllocationCreateTyped");
158        return false;
159    }
160    RS::dispatch->AllocationCreateFromBitmap = (AllocationCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCreateFromBitmap");
161    if (RS::dispatch->AllocationCreateFromBitmap == NULL) {
162        ALOGE("Couldn't initialize RS::dispatch->AllocationCreateFromBitmap");
163        return false;
164    }
165    RS::dispatch->AllocationCubeCreateFromBitmap = (AllocationCubeCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCubeCreateFromBitmap");
166    if (RS::dispatch->AllocationCubeCreateFromBitmap == NULL) {
167        ALOGE("Couldn't initialize RS::dispatch->AllocationCubeCreateFromBitmap");
168        return false;
169    }
170    RS::dispatch->AllocationGetSurface = (AllocationGetSurfaceFnPtr)dlsym(handle, "rsAllocationGetSurface");
171    if (RS::dispatch->AllocationGetSurface == NULL) {
172        ALOGE("Couldn't initialize RS::dispatch->AllocationGetSurface");
173        return false;
174    }
175    RS::dispatch->AllocationSetSurface = (AllocationSetSurfaceFnPtr)dlsym(handle, "rsAllocationSetSurface");
176    if (RS::dispatch->AllocationSetSurface == NULL) {
177        ALOGE("Couldn't initialize RS::dispatch->AllocationSetSurface");
178        return false;
179    }
180    RS::dispatch->ContextFinish = (ContextFinishFnPtr)dlsym(handle, "rsContextFinish");
181    if (RS::dispatch->ContextFinish == NULL) {
182        ALOGE("Couldn't initialize RS::dispatch->ContextFinish");
183        return false;
184    }
185    RS::dispatch->ContextDump = (ContextDumpFnPtr)dlsym(handle, "rsContextDump");
186    if (RS::dispatch->ContextDump == NULL) {
187        ALOGE("Couldn't initialize RS::dispatch->ContextDump");
188        return false;
189    }
190    RS::dispatch->ContextSetPriority = (ContextSetPriorityFnPtr)dlsym(handle, "rsContextSetPriority");
191    if (RS::dispatch->ContextSetPriority == NULL) {
192        ALOGE("Couldn't initialize RS::dispatch->ContextSetPriority");
193        return false;
194    }
195    RS::dispatch->AssignName = (AssignNameFnPtr)dlsym(handle, "rsAssignName");
196    if (RS::dispatch->AssignName == NULL) {
197        ALOGE("Couldn't initialize RS::dispatch->AssignName");
198        return false;
199    }
200    RS::dispatch->ObjDestroy = (ObjDestroyFnPtr)dlsym(handle, "rsObjDestroy");
201    if (RS::dispatch->ObjDestroy == NULL) {
202        ALOGE("Couldn't initialize RS::dispatch->ObjDestroy");
203        return false;
204    }
205    RS::dispatch->ElementCreate = (ElementCreateFnPtr)dlsym(handle, "rsElementCreate");
206    if (RS::dispatch->ElementCreate == NULL) {
207        ALOGE("Couldn't initialize RS::dispatch->ElementCreate");
208        return false;
209    }
210    RS::dispatch->ElementCreate2 = (ElementCreate2FnPtr)dlsym(handle, "rsElementCreate2");
211    if (RS::dispatch->ElementCreate2 == NULL) {
212        ALOGE("Couldn't initialize RS::dispatch->ElementCreate2");
213        return false;
214    }
215    RS::dispatch->AllocationCopyToBitmap = (AllocationCopyToBitmapFnPtr)dlsym(handle, "rsAllocationCopyToBitmap");
216    if (RS::dispatch->AllocationCopyToBitmap == NULL) {
217        ALOGE("Couldn't initialize RS::dispatch->AllocationCopyToBitmap");
218        return false;
219    }
220    RS::dispatch->Allocation1DData = (Allocation1DDataFnPtr)dlsym(handle, "rsAllocation1DData");
221    if (RS::dispatch->Allocation1DData == NULL) {
222        ALOGE("Couldn't initialize RS::dispatch->Allocation1DData");
223        return false;
224    }
225    RS::dispatch->Allocation1DElementData = (Allocation1DElementDataFnPtr)dlsym(handle, "rsAllocation1DElementData");
226    if (RS::dispatch->Allocation1DElementData == NULL) {
227        ALOGE("Couldn't initialize RS::dispatch->Allocation1DElementData");
228        return false;
229    }
230    RS::dispatch->Allocation2DData = (Allocation2DDataFnPtr)dlsym(handle, "rsAllocation2DData");
231    if (RS::dispatch->Allocation2DData == NULL) {
232        ALOGE("Couldn't initialize RS::dispatch->Allocation2DData");
233        return false;
234    }
235    RS::dispatch->Allocation3DData = (Allocation3DDataFnPtr)dlsym(handle, "rsAllocation3DData");
236    if (RS::dispatch->Allocation3DData == NULL) {
237        ALOGE("Couldn't initialize RS::dispatch->Allocation3DData");
238        return false;
239    }
240    RS::dispatch->AllocationGenerateMipmaps = (AllocationGenerateMipmapsFnPtr)dlsym(handle, "rsAllocationGenerateMipmaps");
241    if (RS::dispatch->AllocationGenerateMipmaps == NULL) {
242        ALOGE("Couldn't initialize RS::dispatch->AllocationGenerateMipmaps");
243        return false;
244    }
245    RS::dispatch->AllocationRead = (AllocationReadFnPtr)dlsym(handle, "rsAllocationRead");
246    if (RS::dispatch->AllocationRead == NULL) {
247        ALOGE("Couldn't initialize RS::dispatch->AllocationRead");
248        return false;
249    }
250    RS::dispatch->Allocation1DRead = (Allocation1DReadFnPtr)dlsym(handle, "rsAllocation1DRead");
251    if (RS::dispatch->Allocation1DRead == NULL) {
252        ALOGE("Couldn't initialize RS::dispatch->Allocation1DRead");
253        return false;
254    }
255    RS::dispatch->Allocation2DRead = (Allocation2DReadFnPtr)dlsym(handle, "rsAllocation2DRead");
256    if (RS::dispatch->Allocation2DRead == NULL) {
257        ALOGE("Couldn't initialize RS::dispatch->Allocation2DRead");
258        return false;
259    }
260    RS::dispatch->AllocationSyncAll = (AllocationSyncAllFnPtr)dlsym(handle, "rsAllocationSyncAll");
261    if (RS::dispatch->AllocationSyncAll == NULL) {
262        ALOGE("Couldn't initialize RS::dispatch->AllocationSyncAll");
263        return false;
264    }
265    RS::dispatch->AllocationResize1D = (AllocationResize1DFnPtr)dlsym(handle, "rsAllocationResize1D");
266    if (RS::dispatch->AllocationResize1D == NULL) {
267        ALOGE("Couldn't initialize RS::dispatch->AllocationResize1D");
268        return false;
269    }
270    RS::dispatch->AllocationCopy2DRange = (AllocationCopy2DRangeFnPtr)dlsym(handle, "rsAllocationCopy2DRange");
271    if (RS::dispatch->AllocationCopy2DRange == NULL) {
272        ALOGE("Couldn't initialize RS::dispatch->AllocationCopy2DRange");
273        return false;
274    }
275    RS::dispatch->AllocationCopy3DRange = (AllocationCopy3DRangeFnPtr)dlsym(handle, "rsAllocationCopy3DRange");
276    if (RS::dispatch->AllocationCopy3DRange == NULL) {
277        ALOGE("Couldn't initialize RS::dispatch->AllocationCopy3DRange");
278        return false;
279    }
280    RS::dispatch->SamplerCreate = (SamplerCreateFnPtr)dlsym(handle, "rsSamplerCreate");
281    if (RS::dispatch->SamplerCreate == NULL) {
282        ALOGE("Couldn't initialize RS::dispatch->SamplerCreate");
283        return false;
284    }
285    RS::dispatch->ScriptBindAllocation = (ScriptBindAllocationFnPtr)dlsym(handle, "rsScriptBindAllocation");
286    if (RS::dispatch->ScriptBindAllocation == NULL) {
287        ALOGE("Couldn't initialize RS::dispatch->ScriptBindAllocation");
288        return false;
289    }
290    RS::dispatch->ScriptSetTimeZone = (ScriptSetTimeZoneFnPtr)dlsym(handle, "rsScriptSetTimeZone");
291    if (RS::dispatch->ScriptSetTimeZone == NULL) {
292        ALOGE("Couldn't initialize RS::dispatch->ScriptSetTimeZone");
293        return false;
294    }
295    RS::dispatch->ScriptInvoke = (ScriptInvokeFnPtr)dlsym(handle, "rsScriptInvoke");
296    if (RS::dispatch->ScriptInvoke == NULL) {
297        ALOGE("Couldn't initialize RS::dispatch->ScriptInvoke");
298        return false;
299    }
300    RS::dispatch->ScriptInvokeV = (ScriptInvokeVFnPtr)dlsym(handle, "rsScriptInvokeV");
301    if (RS::dispatch->ScriptInvokeV == NULL) {
302        ALOGE("Couldn't initialize RS::dispatch->ScriptInvokeV");
303        return false;
304    }
305    RS::dispatch->ScriptForEach = (ScriptForEachFnPtr)dlsym(handle, "rsScriptForEach");
306    if (RS::dispatch->ScriptForEach == NULL) {
307        ALOGE("Couldn't initialize RS::dispatch->ScriptForEach");
308        return false;
309    }
310    RS::dispatch->ScriptSetVarI = (ScriptSetVarIFnPtr)dlsym(handle, "rsScriptSetVarI");
311    if (RS::dispatch->ScriptSetVarI == NULL) {
312        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarI");
313        return false;
314    }
315    RS::dispatch->ScriptSetVarObj = (ScriptSetVarObjFnPtr)dlsym(handle, "rsScriptSetVarObj");
316    if (RS::dispatch->ScriptSetVarObj == NULL) {
317        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarObj");
318        return false;
319    }
320    RS::dispatch->ScriptSetVarJ = (ScriptSetVarJFnPtr)dlsym(handle, "rsScriptSetVarJ");
321    if (RS::dispatch->ScriptSetVarJ == NULL) {
322        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarJ");
323        return false;
324    }
325    RS::dispatch->ScriptSetVarF = (ScriptSetVarFFnPtr)dlsym(handle, "rsScriptSetVarF");
326    if (RS::dispatch->ScriptSetVarF == NULL) {
327        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarF");
328        return false;
329    }
330    RS::dispatch->ScriptSetVarD = (ScriptSetVarDFnPtr)dlsym(handle, "rsScriptSetVarD");
331    if (RS::dispatch->ScriptSetVarD == NULL) {
332        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarD");
333        return false;
334    }
335    RS::dispatch->ScriptSetVarV = (ScriptSetVarVFnPtr)dlsym(handle, "rsScriptSetVarV");
336    if (RS::dispatch->ScriptSetVarV == NULL) {
337        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarV");
338        return false;
339    }
340    RS::dispatch->ScriptGetVarV = (ScriptGetVarVFnPtr)dlsym(handle, "rsScriptGetVarV");
341    if (RS::dispatch->ScriptGetVarV == NULL) {
342        ALOGE("Couldn't initialize RS::dispatch->ScriptGetVarV");
343        return false;
344    }
345    RS::dispatch->ScriptSetVarVE = (ScriptSetVarVEFnPtr)dlsym(handle, "rsScriptSetVarVE");
346    if (RS::dispatch->ScriptSetVarVE == NULL) {
347        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarVE");
348        return false;
349    }
350    RS::dispatch->ScriptCCreate = (ScriptCCreateFnPtr)dlsym(handle, "rsScriptCCreate");
351    if (RS::dispatch->ScriptCCreate == NULL) {
352        ALOGE("Couldn't initialize RS::dispatch->ScriptCCreate");
353        return false;
354    }
355    RS::dispatch->ScriptIntrinsicCreate = (ScriptIntrinsicCreateFnPtr)dlsym(handle, "rsScriptIntrinsicCreate");
356    if (RS::dispatch->ScriptIntrinsicCreate == NULL) {
357        ALOGE("Couldn't initialize RS::dispatch->ScriptIntrinsicCreate");
358        return false;
359    }
360    RS::dispatch->ScriptKernelIDCreate = (ScriptKernelIDCreateFnPtr)dlsym(handle, "rsScriptKernelIDCreate");
361    if (RS::dispatch->ScriptKernelIDCreate == NULL) {
362        ALOGE("Couldn't initialize RS::dispatch->ScriptKernelIDCreate");
363        return false;
364    }
365    RS::dispatch->ScriptFieldIDCreate = (ScriptFieldIDCreateFnPtr)dlsym(handle, "rsScriptFieldIDCreate");
366    if (RS::dispatch->ScriptFieldIDCreate == NULL) {
367        ALOGE("Couldn't initialize RS::dispatch->ScriptFieldIDCreate");
368        return false;
369    }
370    RS::dispatch->ScriptGroupCreate = (ScriptGroupCreateFnPtr)dlsym(handle, "rsScriptGroupCreate");
371    if (RS::dispatch->ScriptGroupCreate == NULL) {
372        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupCreate");
373        return false;
374    }
375    RS::dispatch->ScriptGroupSetOutput = (ScriptGroupSetOutputFnPtr)dlsym(handle, "rsScriptGroupSetOutput");
376    if (RS::dispatch->ScriptGroupSetOutput == NULL) {
377        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupSetOutput");
378        return false;
379    }
380    RS::dispatch->ScriptGroupSetInput = (ScriptGroupSetInputFnPtr)dlsym(handle, "rsScriptGroupSetInput");
381    if (RS::dispatch->ScriptGroupSetInput == NULL) {
382        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupSetInput");
383        return false;
384    }
385    RS::dispatch->ScriptGroupExecute = (ScriptGroupExecuteFnPtr)dlsym(handle, "rsScriptGroupExecute");
386    if (RS::dispatch->ScriptGroupExecute == NULL) {
387        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupExecute");
388        return false;
389    }
390    RS::dispatch->AllocationIoSend = (AllocationIoSendFnPtr)dlsym(handle, "rsAllocationIoSend");
391    if (RS::dispatch->AllocationIoSend == NULL) {
392        ALOGE("Couldn't initialize RS::dispatch->AllocationIoSend");
393        return false;
394    }
395    RS::dispatch->AllocationIoReceive = (AllocationIoReceiveFnPtr)dlsym(handle, "rsAllocationIoReceive");
396    if (RS::dispatch->AllocationIoReceive == NULL) {
397        ALOGE("Couldn't initialize RS::dispatch->AllocationIoReceive");
398        return false;
399    }
400
401    return true;
402}
403
404// this will only open API 19+ libRS
405// because that's when we changed libRS to extern "C" entry points
406static bool loadSO(const char* filename) {
407    void* handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
408    if (handle == NULL) {
409        ALOGE("couldn't dlopen %s, %s", filename, dlerror());
410        return false;
411    }
412
413    if (loadSymbols(handle) == false) {
414        ALOGE("%s init failed!", filename);
415        return false;
416    }
417    //ALOGE("Successfully loaded %s", filename);
418    return true;
419}
420
421static uint32_t getProp(const char *str) {
422#if !defined(RS_SERVER) && defined(HAVE_ANDROID_OS)
423    char buf[256];
424    property_get(str, buf, "0");
425    return atoi(buf);
426#else
427    return 0;
428#endif
429}
430
431bool RS::initDispatch(int targetApi) {
432    pthread_mutex_lock(&gInitMutex);
433    if (gInitError) {
434        goto error;
435    } else if (gInitialized) {
436        pthread_mutex_unlock(&gInitMutex);
437        return true;
438    }
439
440    RS::dispatch = new dispatchTable;
441
442    // attempt to load libRS, load libRSSupport on failure
443    // if property is set, proceed directly to libRSSupport
444    if (getProp("debug.rs.forcecompat") == 0) {
445        usingNative = loadSO("libRS.so");
446    }
447    if (usingNative == false) {
448        if (loadSO("libRSSupport.so") == false) {
449            ALOGE("Failed to load libRS.so and libRSSupport.so");
450            goto error;
451        }
452    }
453
454    gInitialized = true;
455
456    pthread_mutex_unlock(&gInitMutex);
457    return true;
458
459 error:
460    gInitError = 1;
461    pthread_mutex_unlock(&gInitMutex);
462    return false;
463}
464
465bool RS::init(int targetApi, uint32_t flags) {
466    if (initDispatch(targetApi) == false) {
467        ALOGE("Couldn't initialize dispatch table");
468        return false;
469    }
470
471    mDev = RS::dispatch->DeviceCreate();
472    if (mDev == 0) {
473        ALOGE("Device creation failed");
474        return false;
475    }
476
477    if (flags >= RS_CONTEXT_MAX) {
478        ALOGE("Invalid flags passed");
479        return false;
480    }
481
482    mContext = RS::dispatch->ContextCreate(mDev, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags);
483    if (mContext == 0) {
484        ALOGE("Context creation failed");
485        return false;
486    }
487
488    pid_t mNativeMessageThreadId;
489
490    int status = pthread_create(&mMessageThreadId, NULL, threadProc, this);
491    if (status) {
492        ALOGE("Failed to start RS message thread.");
493        return false;
494    }
495    // Wait for the message thread to be active.
496    while (!mMessageRun) {
497        usleep(1000);
498    }
499
500    mInit = true;
501
502    return true;
503}
504
505void RS::throwError(RSError error, const char *errMsg) {
506    if (mCurrentError == RS_SUCCESS) {
507        mCurrentError = error;
508        ALOGE("RS CPP error: %s", errMsg);
509    } else {
510        ALOGE("RS CPP error (masked by previous error): %s", errMsg);
511    }
512}
513
514RSError RS::getError() {
515    return mCurrentError;
516}
517
518
519void * RS::threadProc(void *vrsc) {
520    RS *rs = static_cast<RS *>(vrsc);
521    size_t rbuf_size = 256;
522    void * rbuf = malloc(rbuf_size);
523
524    RS::dispatch->ContextInitToClient(rs->mContext);
525    rs->mMessageRun = true;
526
527    while (rs->mMessageRun) {
528        size_t receiveLen = 0;
529        uint32_t usrID = 0;
530        uint32_t subID = 0;
531        RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
532                                                                   &receiveLen, sizeof(receiveLen),
533                                                                   &usrID, sizeof(usrID));
534
535        if (receiveLen >= rbuf_size) {
536            rbuf_size = receiveLen + 32;
537            rbuf = realloc(rbuf, rbuf_size);
538        }
539        if (!rbuf) {
540            ALOGE("RS::message handler realloc error %zu", rbuf_size);
541            // No clean way to recover now?
542        }
543        RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
544                            &subID, sizeof(subID));
545
546        switch(r) {
547        case RS_MESSAGE_TO_CLIENT_ERROR:
548            ALOGE("RS Error %s", (const char *)rbuf);
549            rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime");
550            if(rs->mMessageFunc != NULL) {
551                rs->mErrorFunc(usrID, (const char *)rbuf);
552            }
553            break;
554        case RS_MESSAGE_TO_CLIENT_NONE:
555        case RS_MESSAGE_TO_CLIENT_EXCEPTION:
556        case RS_MESSAGE_TO_CLIENT_RESIZE:
557            // teardown. But we want to avoid starving other threads during
558            // teardown by yielding until the next line in the destructor can
559            // execute to set mRun = false. Note that the FIFO sends an
560            // empty NONE message when it reaches its destructor.
561            usleep(1000);
562            break;
563        case RS_MESSAGE_TO_CLIENT_USER:
564            if(rs->mMessageFunc != NULL) {
565                rs->mMessageFunc(usrID, rbuf, receiveLen);
566            } else {
567                ALOGE("Received a message from the script with no message handler installed.");
568            }
569            break;
570
571        default:
572            ALOGE("RS unknown message type %i", r);
573        }
574    }
575
576    if (rbuf) {
577        free(rbuf);
578    }
579    ALOGE("RS Message thread exiting.");
580    return NULL;
581}
582
583void RS::setErrorHandler(ErrorHandlerFunc_t func) {
584    mErrorFunc = func;
585}
586
587void RS::setMessageHandler(MessageHandlerFunc_t func) {
588    mMessageFunc  = func;
589}
590
591void RS::finish() {
592    RS::dispatch->ContextFinish(mContext);
593}
594