RenderScript.cpp revision 10913a5c37ba119bef335320d3e8be25212c05ad 
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
24#include <dlfcn.h>
25
26#if !defined(RS_SERVER) && defined(HAVE_ANDROID_OS)
27#include <cutils/properties.h>
28#endif
29
30#define LOG_NDEBUG 0
31#define LOG_TAG "rsC++"
32
33using namespace android;
34using namespace RSC;
35
36bool RS::gInitialized = false;
37bool RS::usingNative = false;
38pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
39dispatchTable* RS::dispatch = NULL;
40static int gInitError = 0;
41
42RS::RS() {
43    mDev = NULL;
44    mContext = NULL;
45    mErrorFunc = NULL;
46    mMessageFunc = NULL;
47    mMessageRun = false;
48    mInit = false;
49    mCurrentError = RS_SUCCESS;
50
51    memset(&mElements, 0, sizeof(mElements));
52    memset(&mSamplers, 0, sizeof(mSamplers));
53}
54
55RS::~RS() {
56    if (mInit == true) {
57        mMessageRun = false;
58
59        RS::dispatch->ContextDeinitToClient(mContext);
60
61        void *res = NULL;
62        int status = pthread_join(mMessageThreadId, &res);
63
64        RS::dispatch->ContextDestroy(mContext);
65        mContext = NULL;
66        RS::dispatch->DeviceDestroy(mDev);
67        mDev = NULL;
68    }
69}
70
71bool RS::init(bool forceCpu, bool synchronous) {
72    return RS::init(RS_VERSION, forceCpu, synchronous);
73}
74
75static bool loadSymbols(void* handle) {
76
77    RS::dispatch->AllocationGetType = (AllocationGetTypeFnPtr)dlsym(handle, "rsaAllocationGetType");
78    if (RS::dispatch->AllocationGetType == NULL) {
79        ALOGE("Couldn't initialize RS::dispatch->AllocationGetType");
80        return false;
81    }
82    RS::dispatch->TypeGetNativeData = (TypeGetNativeDataFnPtr)dlsym(handle, "rsaTypeGetNativeData");
83    if (RS::dispatch->TypeGetNativeData == NULL) {
84        ALOGE("Couldn't initialize RS::dispatch->TypeGetNativeData");
85        return false;
86    }
87    RS::dispatch->ElementGetNativeData = (ElementGetNativeDataFnPtr)dlsym(handle, "rsaElementGetNativeData");
88    if (RS::dispatch->ElementGetNativeData == NULL) {
89        ALOGE("Couldn't initialize RS::dispatch->ElementGetNativeData");
90        return false;
91    }
92    RS::dispatch->ElementGetSubElements = (ElementGetSubElementsFnPtr)dlsym(handle, "rsaElementGetSubElements");
93    if (RS::dispatch->ElementGetSubElements == NULL) {
94        ALOGE("Couldn't initialize RS::dispatch->ElementGetSubElements");
95        return false;
96    }
97    RS::dispatch->DeviceCreate = (DeviceCreateFnPtr)dlsym(handle, "rsDeviceCreate");
98    if (RS::dispatch->DeviceCreate == NULL) {
99        ALOGE("Couldn't initialize RS::dispatch->DeviceCreate");
100        return false;
101    }
102    RS::dispatch->DeviceDestroy = (DeviceDestroyFnPtr)dlsym(handle, "rsDeviceDestroy");
103    if (RS::dispatch->DeviceDestroy == NULL) {
104        ALOGE("Couldn't initialize RS::dispatch->DeviceDestroy");
105        return false;
106    }
107    RS::dispatch->DeviceSetConfig = (DeviceSetConfigFnPtr)dlsym(handle, "rsDeviceSetConfig");
108    if (RS::dispatch->DeviceSetConfig == NULL) {
109        ALOGE("Couldn't initialize RS::dispatch->DeviceSetConfig");
110        return false;
111    }
112    RS::dispatch->ContextCreate = (ContextCreateFnPtr)dlsym(handle, "rsContextCreate");;
113    if (RS::dispatch->ContextCreate == NULL) {
114        ALOGE("Couldn't initialize RS::dispatch->ContextCreate");
115        return false;
116    }
117    RS::dispatch->GetName = (GetNameFnPtr)dlsym(handle, "rsaGetName");;
118    if (RS::dispatch->GetName == NULL) {
119        ALOGE("Couldn't initialize RS::dispatch->GetName");
120        return false;
121    }
122    RS::dispatch->ContextDestroy = (ContextDestroyFnPtr)dlsym(handle, "rsContextDestroy");
123    if (RS::dispatch->ContextDestroy == NULL) {
124        ALOGE("Couldn't initialize RS::dispatch->ContextDestroy");
125        return false;
126    }
127    RS::dispatch->ContextGetMessage = (ContextGetMessageFnPtr)dlsym(handle, "rsContextGetMessage");
128    if (RS::dispatch->ContextGetMessage == NULL) {
129        ALOGE("Couldn't initialize RS::dispatch->ContextGetMessage");
130        return false;
131    }
132    RS::dispatch->ContextPeekMessage = (ContextPeekMessageFnPtr)dlsym(handle, "rsContextPeekMessage");
133    if (RS::dispatch->ContextPeekMessage == NULL) {
134        ALOGE("Couldn't initialize RS::dispatch->ContextPeekMessage");
135        return false;
136    }
137    RS::dispatch->ContextSendMessage = (ContextSendMessageFnPtr)dlsym(handle, "rsContextSendMessage");
138    if (RS::dispatch->ContextSendMessage == NULL) {
139        ALOGE("Couldn't initialize RS::dispatch->ContextSendMessage");
140        return false;
141    }
142    RS::dispatch->ContextInitToClient = (ContextInitToClientFnPtr)dlsym(handle, "rsContextInitToClient");
143    if (RS::dispatch->ContextInitToClient == NULL) {
144        ALOGE("Couldn't initialize RS::dispatch->ContextInitToClient");
145        return false;
146    }
147    RS::dispatch->ContextDeinitToClient = (ContextDeinitToClientFnPtr)dlsym(handle, "rsContextDeinitToClient");
148    if (RS::dispatch->ContextDeinitToClient == NULL) {
149        ALOGE("Couldn't initialize RS::dispatch->ContextDeinitToClient");
150        return false;
151    }
152    RS::dispatch->TypeCreate = (TypeCreateFnPtr)dlsym(handle, "rsTypeCreate");
153    if (RS::dispatch->TypeCreate == NULL) {
154        ALOGE("Couldn't initialize RS::dispatch->TypeCreate");
155        return false;
156    }
157    RS::dispatch->AllocationCreateTyped = (AllocationCreateTypedFnPtr)dlsym(handle, "rsAllocationCreateTyped");
158    if (RS::dispatch->AllocationCreateTyped == NULL) {
159        ALOGE("Couldn't initialize RS::dispatch->AllocationCreateTyped");
160        return false;
161    }
162    RS::dispatch->AllocationCreateFromBitmap = (AllocationCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCreateFromBitmap");
163    if (RS::dispatch->AllocationCreateFromBitmap == NULL) {
164        ALOGE("Couldn't initialize RS::dispatch->AllocationCreateFromBitmap");
165        return false;
166    }
167    RS::dispatch->AllocationCubeCreateFromBitmap = (AllocationCubeCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCubeCreateFromBitmap");
168    if (RS::dispatch->AllocationCubeCreateFromBitmap == NULL) {
169        ALOGE("Couldn't initialize RS::dispatch->AllocationCubeCreateFromBitmap");
170        return false;
171    }
172    RS::dispatch->AllocationGetSurface = (AllocationGetSurfaceFnPtr)dlsym(handle, "rsAllocationGetSurface");
173    if (RS::dispatch->AllocationGetSurface == NULL) {
174        ALOGE("Couldn't initialize RS::dispatch->AllocationGetSurface");
175        return false;
176    }
177    RS::dispatch->AllocationSetSurface = (AllocationSetSurfaceFnPtr)dlsym(handle, "rsAllocationSetSurface");
178    if (RS::dispatch->AllocationSetSurface == NULL) {
179        ALOGE("Couldn't initialize RS::dispatch->AllocationSetSurface");
180        return false;
181    }
182    RS::dispatch->ContextFinish = (ContextFinishFnPtr)dlsym(handle, "rsContextFinish");
183    if (RS::dispatch->ContextFinish == NULL) {
184        ALOGE("Couldn't initialize RS::dispatch->ContextFinish");
185        return false;
186    }
187    RS::dispatch->ContextDump = (ContextDumpFnPtr)dlsym(handle, "rsContextDump");
188    if (RS::dispatch->ContextDump == NULL) {
189        ALOGE("Couldn't initialize RS::dispatch->ContextDump");
190        return false;
191    }
192    RS::dispatch->ContextSetPriority = (ContextSetPriorityFnPtr)dlsym(handle, "rsContextSetPriority");
193    if (RS::dispatch->ContextSetPriority == NULL) {
194        ALOGE("Couldn't initialize RS::dispatch->ContextSetPriority");
195        return false;
196    }
197    RS::dispatch->AssignName = (AssignNameFnPtr)dlsym(handle, "rsAssignName");
198    if (RS::dispatch->AssignName == NULL) {
199        ALOGE("Couldn't initialize RS::dispatch->AssignName");
200        return false;
201    }
202    RS::dispatch->ObjDestroy = (ObjDestroyFnPtr)dlsym(handle, "rsObjDestroy");
203    if (RS::dispatch->ObjDestroy == NULL) {
204        ALOGE("Couldn't initialize RS::dispatch->ObjDestroy");
205        return false;
206    }
207    RS::dispatch->ElementCreate = (ElementCreateFnPtr)dlsym(handle, "rsElementCreate");
208    if (RS::dispatch->ElementCreate == NULL) {
209        ALOGE("Couldn't initialize RS::dispatch->ElementCreate");
210        return false;
211    }
212    RS::dispatch->ElementCreate2 = (ElementCreate2FnPtr)dlsym(handle, "rsElementCreate2");
213    if (RS::dispatch->ElementCreate2 == NULL) {
214        ALOGE("Couldn't initialize RS::dispatch->ElementCreate2");
215        return false;
216    }
217    RS::dispatch->AllocationCopyToBitmap = (AllocationCopyToBitmapFnPtr)dlsym(handle, "rsAllocationCopyToBitmap");
218    if (RS::dispatch->AllocationCopyToBitmap == NULL) {
219        ALOGE("Couldn't initialize RS::dispatch->AllocationCopyToBitmap");
220        return false;
221    }
222    RS::dispatch->Allocation1DData = (Allocation1DDataFnPtr)dlsym(handle, "rsAllocation1DData");
223    if (RS::dispatch->Allocation1DData == NULL) {
224        ALOGE("Couldn't initialize RS::dispatch->Allocation1DData");
225        return false;
226    }
227    RS::dispatch->Allocation1DElementData = (Allocation1DElementDataFnPtr)dlsym(handle, "rsAllocation1DElementData");
228    if (RS::dispatch->Allocation1DElementData == NULL) {
229        ALOGE("Couldn't initialize RS::dispatch->Allocation1DElementData");
230        return false;
231    }
232    RS::dispatch->Allocation2DData = (Allocation2DDataFnPtr)dlsym(handle, "rsAllocation2DData");
233    if (RS::dispatch->Allocation2DData == NULL) {
234        ALOGE("Couldn't initialize RS::dispatch->Allocation2DData");
235        return false;
236    }
237    RS::dispatch->Allocation3DData = (Allocation3DDataFnPtr)dlsym(handle, "rsAllocation3DData");
238    if (RS::dispatch->Allocation3DData == NULL) {
239        ALOGE("Couldn't initialize RS::dispatch->Allocation3DData");
240        return false;
241    }
242    RS::dispatch->AllocationGenerateMipmaps = (AllocationGenerateMipmapsFnPtr)dlsym(handle, "rsAllocationGenerateMipmaps");
243    if (RS::dispatch->AllocationGenerateMipmaps == NULL) {
244        ALOGE("Couldn't initialize RS::dispatch->AllocationGenerateMipmaps");
245        return false;
246    }
247    RS::dispatch->AllocationRead = (AllocationReadFnPtr)dlsym(handle, "rsAllocationRead");
248    if (RS::dispatch->AllocationRead == NULL) {
249        ALOGE("Couldn't initialize RS::dispatch->AllocationRead");
250        return false;
251    }
252    RS::dispatch->Allocation1DRead = (Allocation1DReadFnPtr)dlsym(handle, "rsAllocation1DRead");
253    if (RS::dispatch->Allocation1DRead == NULL) {
254        ALOGE("Couldn't initialize RS::dispatch->Allocation1DRead");
255        return false;
256    }
257    RS::dispatch->Allocation2DRead = (Allocation2DReadFnPtr)dlsym(handle, "rsAllocation2DRead");
258    if (RS::dispatch->Allocation2DRead == NULL) {
259        ALOGE("Couldn't initialize RS::dispatch->Allocation2DRead");
260        return false;
261    }
262    RS::dispatch->AllocationSyncAll = (AllocationSyncAllFnPtr)dlsym(handle, "rsAllocationSyncAll");
263    if (RS::dispatch->AllocationSyncAll == NULL) {
264        ALOGE("Couldn't initialize RS::dispatch->AllocationSyncAll");
265        return false;
266    }
267    RS::dispatch->AllocationResize1D = (AllocationResize1DFnPtr)dlsym(handle, "rsAllocationResize1D");
268    if (RS::dispatch->AllocationResize1D == NULL) {
269        ALOGE("Couldn't initialize RS::dispatch->AllocationResize1D");
270        return false;
271    }
272    RS::dispatch->AllocationCopy2DRange = (AllocationCopy2DRangeFnPtr)dlsym(handle, "rsAllocationCopy2DRange");
273    if (RS::dispatch->AllocationCopy2DRange == NULL) {
274        ALOGE("Couldn't initialize RS::dispatch->AllocationCopy2DRange");
275        return false;
276    }
277    RS::dispatch->AllocationCopy3DRange = (AllocationCopy3DRangeFnPtr)dlsym(handle, "rsAllocationCopy3DRange");
278    if (RS::dispatch->AllocationCopy3DRange == NULL) {
279        ALOGE("Couldn't initialize RS::dispatch->AllocationCopy3DRange");
280        return false;
281    }
282    RS::dispatch->SamplerCreate = (SamplerCreateFnPtr)dlsym(handle, "rsSamplerCreate");
283    if (RS::dispatch->SamplerCreate == NULL) {
284        ALOGE("Couldn't initialize RS::dispatch->SamplerCreate");
285        return false;
286    }
287    RS::dispatch->ScriptBindAllocation = (ScriptBindAllocationFnPtr)dlsym(handle, "rsScriptBindAllocation");
288    if (RS::dispatch->ScriptBindAllocation == NULL) {
289        ALOGE("Couldn't initialize RS::dispatch->ScriptBindAllocation");
290        return false;
291    }
292    RS::dispatch->ScriptSetTimeZone = (ScriptSetTimeZoneFnPtr)dlsym(handle, "rsScriptSetTimeZone");
293    if (RS::dispatch->ScriptSetTimeZone == NULL) {
294        ALOGE("Couldn't initialize RS::dispatch->ScriptSetTimeZone");
295        return false;
296    }
297    RS::dispatch->ScriptInvoke = (ScriptInvokeFnPtr)dlsym(handle, "rsScriptInvoke");
298    if (RS::dispatch->ScriptInvoke == NULL) {
299        ALOGE("Couldn't initialize RS::dispatch->ScriptInvoke");
300        return false;
301    }
302    RS::dispatch->ScriptInvokeV = (ScriptInvokeVFnPtr)dlsym(handle, "rsScriptInvokeV");
303    if (RS::dispatch->ScriptInvokeV == NULL) {
304        ALOGE("Couldn't initialize RS::dispatch->ScriptInvokeV");
305        return false;
306    }
307    RS::dispatch->ScriptForEach = (ScriptForEachFnPtr)dlsym(handle, "rsScriptForEach");
308    if (RS::dispatch->ScriptForEach == NULL) {
309        ALOGE("Couldn't initialize RS::dispatch->ScriptForEach");
310        return false;
311    }
312    RS::dispatch->ScriptSetVarI = (ScriptSetVarIFnPtr)dlsym(handle, "rsScriptSetVarI");
313    if (RS::dispatch->ScriptSetVarI == NULL) {
314        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarI");
315        return false;
316    }
317    RS::dispatch->ScriptSetVarObj = (ScriptSetVarObjFnPtr)dlsym(handle, "rsScriptSetVarObj");
318    if (RS::dispatch->ScriptSetVarObj == NULL) {
319        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarObj");
320        return false;
321    }
322    RS::dispatch->ScriptSetVarJ = (ScriptSetVarJFnPtr)dlsym(handle, "rsScriptSetVarJ");
323    if (RS::dispatch->ScriptSetVarJ == NULL) {
324        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarJ");
325        return false;
326    }
327    RS::dispatch->ScriptSetVarF = (ScriptSetVarFFnPtr)dlsym(handle, "rsScriptSetVarF");
328    if (RS::dispatch->ScriptSetVarF == NULL) {
329        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarF");
330        return false;
331    }
332    RS::dispatch->ScriptSetVarD = (ScriptSetVarDFnPtr)dlsym(handle, "rsScriptSetVarD");
333    if (RS::dispatch->ScriptSetVarD == NULL) {
334        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarD");
335        return false;
336    }
337    RS::dispatch->ScriptSetVarV = (ScriptSetVarVFnPtr)dlsym(handle, "rsScriptSetVarV");
338    if (RS::dispatch->ScriptSetVarV == NULL) {
339        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarV");
340        return false;
341    }
342    RS::dispatch->ScriptGetVarV = (ScriptGetVarVFnPtr)dlsym(handle, "rsScriptGetVarV");
343    if (RS::dispatch->ScriptGetVarV == NULL) {
344        ALOGE("Couldn't initialize RS::dispatch->ScriptGetVarV");
345        return false;
346    }
347    RS::dispatch->ScriptSetVarVE = (ScriptSetVarVEFnPtr)dlsym(handle, "rsScriptSetVarVE");
348    if (RS::dispatch->ScriptSetVarVE == NULL) {
349        ALOGE("Couldn't initialize RS::dispatch->ScriptSetVarVE");
350        return false;
351    }
352    RS::dispatch->ScriptCCreate = (ScriptCCreateFnPtr)dlsym(handle, "rsScriptCCreate");
353    if (RS::dispatch->ScriptCCreate == NULL) {
354        ALOGE("Couldn't initialize RS::dispatch->ScriptCCreate");
355        return false;
356    }
357    RS::dispatch->ScriptIntrinsicCreate = (ScriptIntrinsicCreateFnPtr)dlsym(handle, "rsScriptIntrinsicCreate");
358    if (RS::dispatch->ScriptIntrinsicCreate == NULL) {
359        ALOGE("Couldn't initialize RS::dispatch->ScriptIntrinsicCreate");
360        return false;
361    }
362    RS::dispatch->ScriptKernelIDCreate = (ScriptKernelIDCreateFnPtr)dlsym(handle, "rsScriptKernelIDCreate");
363    if (RS::dispatch->ScriptKernelIDCreate == NULL) {
364        ALOGE("Couldn't initialize RS::dispatch->ScriptKernelIDCreate");
365        return false;
366    }
367    RS::dispatch->ScriptFieldIDCreate = (ScriptFieldIDCreateFnPtr)dlsym(handle, "rsScriptFieldIDCreate");
368    if (RS::dispatch->ScriptFieldIDCreate == NULL) {
369        ALOGE("Couldn't initialize RS::dispatch->ScriptFieldIDCreate");
370        return false;
371    }
372    RS::dispatch->ScriptGroupCreate = (ScriptGroupCreateFnPtr)dlsym(handle, "rsScriptGroupCreate");
373    if (RS::dispatch->ScriptGroupCreate == NULL) {
374        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupCreate");
375        return false;
376    }
377    RS::dispatch->ScriptGroupSetOutput = (ScriptGroupSetOutputFnPtr)dlsym(handle, "rsScriptGroupSetOutput");
378    if (RS::dispatch->ScriptGroupSetOutput == NULL) {
379        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupSetOutput");
380        return false;
381    }
382    RS::dispatch->ScriptGroupSetInput = (ScriptGroupSetInputFnPtr)dlsym(handle, "rsScriptGroupSetInput");
383    if (RS::dispatch->ScriptGroupSetInput == NULL) {
384        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupSetInput");
385        return false;
386    }
387    RS::dispatch->ScriptGroupExecute = (ScriptGroupExecuteFnPtr)dlsym(handle, "rsScriptGroupExecute");
388    if (RS::dispatch->ScriptGroupExecute == NULL) {
389        ALOGE("Couldn't initialize RS::dispatch->ScriptGroupExecute");
390        return false;
391    }
392    RS::dispatch->AllocationIoSend = (AllocationIoSendFnPtr)dlsym(handle, "rsAllocationIoSend");
393    if (RS::dispatch->AllocationIoSend == NULL) {
394        ALOGE("Couldn't initialize RS::dispatch->AllocationIoSend");
395        return false;
396    }
397    RS::dispatch->AllocationIoReceive = (AllocationIoReceiveFnPtr)dlsym(handle, "rsAllocationIoReceive");
398    if (RS::dispatch->AllocationIoReceive == NULL) {
399        ALOGE("Couldn't initialize RS::dispatch->AllocationIoReceive");
400        return false;
401    }
402
403    return true;
404}
405
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, bool forceCpu, bool synchronous) {
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    mContext = RS::dispatch->ContextCreate(mDev, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, forceCpu, synchronous);
478    if (mContext == 0) {
479        ALOGE("Context creation failed");
480        return false;
481    }
482
483    pid_t mNativeMessageThreadId;
484
485    int status = pthread_create(&mMessageThreadId, NULL, threadProc, this);
486    if (status) {
487        ALOGE("Failed to start RS message thread.");
488        return false;
489    }
490    // Wait for the message thread to be active.
491    while (!mMessageRun) {
492        usleep(1000);
493    }
494
495    mInit = true;
496
497    return true;
498}
499
500void RS::throwError(RSError error, const char *errMsg) {
501    if (mCurrentError == RS_SUCCESS) {
502        mCurrentError = error;
503        ALOGE("RS CPP error: %s", errMsg);
504    } else {
505        ALOGE("RS CPP error (masked by previous error): %s", errMsg);
506    }
507}
508
509RSError RS::getError() {
510    return mCurrentError;
511}
512
513
514void * RS::threadProc(void *vrsc) {
515    RS *rs = static_cast<RS *>(vrsc);
516    size_t rbuf_size = 256;
517    void * rbuf = malloc(rbuf_size);
518
519    RS::dispatch->ContextInitToClient(rs->mContext);
520    rs->mMessageRun = true;
521
522    while (rs->mMessageRun) {
523        size_t receiveLen = 0;
524        uint32_t usrID = 0;
525        uint32_t subID = 0;
526        RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
527                                                                   &receiveLen, sizeof(receiveLen),
528                                                                   &usrID, sizeof(usrID));
529
530        if (receiveLen >= rbuf_size) {
531            rbuf_size = receiveLen + 32;
532            rbuf = realloc(rbuf, rbuf_size);
533        }
534        if (!rbuf) {
535            ALOGE("RS::message handler realloc error %zu", rbuf_size);
536            // No clean way to recover now?
537        }
538        RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
539                            &subID, sizeof(subID));
540
541        switch(r) {
542        case RS_MESSAGE_TO_CLIENT_ERROR:
543            ALOGE("RS Error %s", (const char *)rbuf);
544            rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime");
545            if(rs->mMessageFunc != NULL) {
546                rs->mErrorFunc(usrID, (const char *)rbuf);
547            }
548            break;
549        case RS_MESSAGE_TO_CLIENT_NONE:
550        case RS_MESSAGE_TO_CLIENT_EXCEPTION:
551        case RS_MESSAGE_TO_CLIENT_RESIZE:
552            // teardown. But we want to avoid starving other threads during
553            // teardown by yielding until the next line in the destructor can
554            // execute to set mRun = false. Note that the FIFO sends an
555            // empty NONE message when it reaches its destructor.
556            usleep(1000);
557            break;
558        case RS_MESSAGE_TO_CLIENT_USER:
559            if(rs->mMessageFunc != NULL) {
560                rs->mMessageFunc(usrID, rbuf, receiveLen);
561            } else {
562                ALOGE("Received a message from the script with no message handler installed.");
563            }
564            break;
565
566        default:
567            ALOGE("RS unknown message type %i", r);
568        }
569    }
570
571    if (rbuf) {
572        free(rbuf);
573    }
574    ALOGE("RS Message thread exiting.");
575    return NULL;
576}
577
578void RS::setErrorHandler(ErrorHandlerFunc_t func) {
579    mErrorFunc = func;
580}
581
582void RS::setMessageHandler(MessageHandlerFunc_t func) {
583    mMessageFunc  = func;
584}
585
586void RS::finish() {
587    RS::dispatch->ContextFinish(mContext);
588}
589