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      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 = NULL;
     42 static int gInitError = 0;
     43 
     44 RS::RS() {
     45     mDev = NULL;
     46     mContext = NULL;
     47     mErrorFunc = NULL;
     48     mMessageFunc = NULL;
     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 
     57 RS::~RS() {
     58     if (mInit == true) {
     59         mMessageRun = false;
     60 
     61         if (mContext) {
     62             RS::dispatch->ContextDeinitToClient(mContext);
     63 
     64             void *res = NULL;
     65             int status = pthread_join(mMessageThreadId, &res);
     66 
     67             RS::dispatch->ContextDestroy(mContext);
     68             mContext = NULL;
     69         }
     70         if (mDev) {
     71             RS::dispatch->DeviceDestroy(mDev);
     72             mDev = NULL;
     73         }
     74     }
     75 }
     76 
     77 bool RS::init(std::string name, uint32_t flags) {
     78     return RS::init(name, RS_VERSION, flags);
     79 }
     80 
     81 static bool loadSymbols(void* handle) {
     82 
     83     RS::dispatch->AllocationGetType = (AllocationGetTypeFnPtr)dlsym(handle, "rsaAllocationGetType");
     84     if (RS::dispatch->AllocationGetType == NULL) {
     85         ALOGV("Couldn't initialize RS::dispatch->AllocationGetType");
     86         return false;
     87     }
     88     RS::dispatch->TypeGetNativeData = (TypeGetNativeDataFnPtr)dlsym(handle, "rsaTypeGetNativeData");
     89     if (RS::dispatch->TypeGetNativeData == NULL) {
     90         ALOGV("Couldn't initialize RS::dispatch->TypeGetNativeData");
     91         return false;
     92     }
     93     RS::dispatch->ElementGetNativeData = (ElementGetNativeDataFnPtr)dlsym(handle, "rsaElementGetNativeData");
     94     if (RS::dispatch->ElementGetNativeData == NULL) {
     95         ALOGV("Couldn't initialize RS::dispatch->ElementGetNativeData");
     96         return false;
     97     }
     98     RS::dispatch->ElementGetSubElements = (ElementGetSubElementsFnPtr)dlsym(handle, "rsaElementGetSubElements");
     99     if (RS::dispatch->ElementGetSubElements == NULL) {
    100         ALOGV("Couldn't initialize RS::dispatch->ElementGetSubElements");
    101         return false;
    102     }
    103     RS::dispatch->DeviceCreate = (DeviceCreateFnPtr)dlsym(handle, "rsDeviceCreate");
    104     if (RS::dispatch->DeviceCreate == NULL) {
    105         ALOGV("Couldn't initialize RS::dispatch->DeviceCreate");
    106         return false;
    107     }
    108     RS::dispatch->DeviceDestroy = (DeviceDestroyFnPtr)dlsym(handle, "rsDeviceDestroy");
    109     if (RS::dispatch->DeviceDestroy == NULL) {
    110         ALOGV("Couldn't initialize RS::dispatch->DeviceDestroy");
    111         return false;
    112     }
    113     RS::dispatch->DeviceSetConfig = (DeviceSetConfigFnPtr)dlsym(handle, "rsDeviceSetConfig");
    114     if (RS::dispatch->DeviceSetConfig == NULL) {
    115         ALOGV("Couldn't initialize RS::dispatch->DeviceSetConfig");
    116         return false;
    117     }
    118     RS::dispatch->ContextCreate = (ContextCreateFnPtr)dlsym(handle, "rsContextCreate");;
    119     if (RS::dispatch->ContextCreate == NULL) {
    120         ALOGV("Couldn't initialize RS::dispatch->ContextCreate");
    121         return false;
    122     }
    123     RS::dispatch->GetName = (GetNameFnPtr)dlsym(handle, "rsaGetName");;
    124     if (RS::dispatch->GetName == NULL) {
    125         ALOGV("Couldn't initialize RS::dispatch->GetName");
    126         return false;
    127     }
    128     RS::dispatch->ContextDestroy = (ContextDestroyFnPtr)dlsym(handle, "rsContextDestroy");
    129     if (RS::dispatch->ContextDestroy == NULL) {
    130         ALOGV("Couldn't initialize RS::dispatch->ContextDestroy");
    131         return false;
    132     }
    133     RS::dispatch->ContextGetMessage = (ContextGetMessageFnPtr)dlsym(handle, "rsContextGetMessage");
    134     if (RS::dispatch->ContextGetMessage == NULL) {
    135         ALOGV("Couldn't initialize RS::dispatch->ContextGetMessage");
    136         return false;
    137     }
    138     RS::dispatch->ContextPeekMessage = (ContextPeekMessageFnPtr)dlsym(handle, "rsContextPeekMessage");
    139     if (RS::dispatch->ContextPeekMessage == NULL) {
    140         ALOGV("Couldn't initialize RS::dispatch->ContextPeekMessage");
    141         return false;
    142     }
    143     RS::dispatch->ContextSendMessage = (ContextSendMessageFnPtr)dlsym(handle, "rsContextSendMessage");
    144     if (RS::dispatch->ContextSendMessage == NULL) {
    145         ALOGV("Couldn't initialize RS::dispatch->ContextSendMessage");
    146         return false;
    147     }
    148     RS::dispatch->ContextInitToClient = (ContextInitToClientFnPtr)dlsym(handle, "rsContextInitToClient");
    149     if (RS::dispatch->ContextInitToClient == NULL) {
    150         ALOGV("Couldn't initialize RS::dispatch->ContextInitToClient");
    151         return false;
    152     }
    153     RS::dispatch->ContextDeinitToClient = (ContextDeinitToClientFnPtr)dlsym(handle, "rsContextDeinitToClient");
    154     if (RS::dispatch->ContextDeinitToClient == NULL) {
    155         ALOGV("Couldn't initialize RS::dispatch->ContextDeinitToClient");
    156         return false;
    157     }
    158     RS::dispatch->TypeCreate = (TypeCreateFnPtr)dlsym(handle, "rsTypeCreate");
    159     if (RS::dispatch->TypeCreate == NULL) {
    160         ALOGV("Couldn't initialize RS::dispatch->TypeCreate");
    161         return false;
    162     }
    163     RS::dispatch->AllocationCreateTyped = (AllocationCreateTypedFnPtr)dlsym(handle, "rsAllocationCreateTyped");
    164     if (RS::dispatch->AllocationCreateTyped == NULL) {
    165         ALOGV("Couldn't initialize RS::dispatch->AllocationCreateTyped");
    166         return false;
    167     }
    168     RS::dispatch->AllocationCreateFromBitmap = (AllocationCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCreateFromBitmap");
    169     if (RS::dispatch->AllocationCreateFromBitmap == NULL) {
    170         ALOGV("Couldn't initialize RS::dispatch->AllocationCreateFromBitmap");
    171         return false;
    172     }
    173     RS::dispatch->AllocationCubeCreateFromBitmap = (AllocationCubeCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCubeCreateFromBitmap");
    174     if (RS::dispatch->AllocationCubeCreateFromBitmap == NULL) {
    175         ALOGV("Couldn't initialize RS::dispatch->AllocationCubeCreateFromBitmap");
    176         return false;
    177     }
    178     RS::dispatch->AllocationGetSurface = (AllocationGetSurfaceFnPtr)dlsym(handle, "rsAllocationGetSurface");
    179     if (RS::dispatch->AllocationGetSurface == NULL) {
    180         ALOGV("Couldn't initialize RS::dispatch->AllocationGetSurface");
    181         return false;
    182     }
    183     RS::dispatch->AllocationSetSurface = (AllocationSetSurfaceFnPtr)dlsym(handle, "rsAllocationSetSurface");
    184     if (RS::dispatch->AllocationSetSurface == NULL) {
    185         ALOGV("Couldn't initialize RS::dispatch->AllocationSetSurface");
    186         return false;
    187     }
    188     RS::dispatch->ContextFinish = (ContextFinishFnPtr)dlsym(handle, "rsContextFinish");
    189     if (RS::dispatch->ContextFinish == NULL) {
    190         ALOGV("Couldn't initialize RS::dispatch->ContextFinish");
    191         return false;
    192     }
    193     RS::dispatch->ContextDump = (ContextDumpFnPtr)dlsym(handle, "rsContextDump");
    194     if (RS::dispatch->ContextDump == NULL) {
    195         ALOGV("Couldn't initialize RS::dispatch->ContextDump");
    196         return false;
    197     }
    198     RS::dispatch->ContextSetPriority = (ContextSetPriorityFnPtr)dlsym(handle, "rsContextSetPriority");
    199     if (RS::dispatch->ContextSetPriority == NULL) {
    200         ALOGV("Couldn't initialize RS::dispatch->ContextSetPriority");
    201         return false;
    202     }
    203     RS::dispatch->AssignName = (AssignNameFnPtr)dlsym(handle, "rsAssignName");
    204     if (RS::dispatch->AssignName == NULL) {
    205         ALOGV("Couldn't initialize RS::dispatch->AssignName");
    206         return false;
    207     }
    208     RS::dispatch->ObjDestroy = (ObjDestroyFnPtr)dlsym(handle, "rsObjDestroy");
    209     if (RS::dispatch->ObjDestroy == NULL) {
    210         ALOGV("Couldn't initialize RS::dispatch->ObjDestroy");
    211         return false;
    212     }
    213     RS::dispatch->ElementCreate = (ElementCreateFnPtr)dlsym(handle, "rsElementCreate");
    214     if (RS::dispatch->ElementCreate == NULL) {
    215         ALOGV("Couldn't initialize RS::dispatch->ElementCreate");
    216         return false;
    217     }
    218     RS::dispatch->ElementCreate2 = (ElementCreate2FnPtr)dlsym(handle, "rsElementCreate2");
    219     if (RS::dispatch->ElementCreate2 == NULL) {
    220         ALOGV("Couldn't initialize RS::dispatch->ElementCreate2");
    221         return false;
    222     }
    223     RS::dispatch->AllocationCopyToBitmap = (AllocationCopyToBitmapFnPtr)dlsym(handle, "rsAllocationCopyToBitmap");
    224     if (RS::dispatch->AllocationCopyToBitmap == NULL) {
    225         ALOGV("Couldn't initialize RS::dispatch->AllocationCopyToBitmap");
    226         return false;
    227     }
    228     RS::dispatch->Allocation1DData = (Allocation1DDataFnPtr)dlsym(handle, "rsAllocation1DData");
    229     if (RS::dispatch->Allocation1DData == NULL) {
    230         ALOGV("Couldn't initialize RS::dispatch->Allocation1DData");
    231         return false;
    232     }
    233     RS::dispatch->Allocation1DElementData = (Allocation1DElementDataFnPtr)dlsym(handle, "rsAllocation1DElementData");
    234     if (RS::dispatch->Allocation1DElementData == NULL) {
    235         ALOGV("Couldn't initialize RS::dispatch->Allocation1DElementData");
    236         return false;
    237     }
    238     RS::dispatch->Allocation2DData = (Allocation2DDataFnPtr)dlsym(handle, "rsAllocation2DData");
    239     if (RS::dispatch->Allocation2DData == NULL) {
    240         ALOGV("Couldn't initialize RS::dispatch->Allocation2DData");
    241         return false;
    242     }
    243     RS::dispatch->Allocation3DData = (Allocation3DDataFnPtr)dlsym(handle, "rsAllocation3DData");
    244     if (RS::dispatch->Allocation3DData == NULL) {
    245         ALOGV("Couldn't initialize RS::dispatch->Allocation3DData");
    246         return false;
    247     }
    248     RS::dispatch->AllocationGenerateMipmaps = (AllocationGenerateMipmapsFnPtr)dlsym(handle, "rsAllocationGenerateMipmaps");
    249     if (RS::dispatch->AllocationGenerateMipmaps == NULL) {
    250         ALOGV("Couldn't initialize RS::dispatch->AllocationGenerateMipmaps");
    251         return false;
    252     }
    253     RS::dispatch->AllocationRead = (AllocationReadFnPtr)dlsym(handle, "rsAllocationRead");
    254     if (RS::dispatch->AllocationRead == NULL) {
    255         ALOGV("Couldn't initialize RS::dispatch->AllocationRead");
    256         return false;
    257     }
    258     RS::dispatch->Allocation1DRead = (Allocation1DReadFnPtr)dlsym(handle, "rsAllocation1DRead");
    259     if (RS::dispatch->Allocation1DRead == NULL) {
    260         ALOGV("Couldn't initialize RS::dispatch->Allocation1DRead");
    261         return false;
    262     }
    263     RS::dispatch->Allocation2DRead = (Allocation2DReadFnPtr)dlsym(handle, "rsAllocation2DRead");
    264     if (RS::dispatch->Allocation2DRead == NULL) {
    265         ALOGV("Couldn't initialize RS::dispatch->Allocation2DRead");
    266         return false;
    267     }
    268     RS::dispatch->AllocationSyncAll = (AllocationSyncAllFnPtr)dlsym(handle, "rsAllocationSyncAll");
    269     if (RS::dispatch->AllocationSyncAll == NULL) {
    270         ALOGV("Couldn't initialize RS::dispatch->AllocationSyncAll");
    271         return false;
    272     }
    273     RS::dispatch->AllocationResize1D = (AllocationResize1DFnPtr)dlsym(handle, "rsAllocationResize1D");
    274     if (RS::dispatch->AllocationResize1D == NULL) {
    275         ALOGV("Couldn't initialize RS::dispatch->AllocationResize1D");
    276         return false;
    277     }
    278     RS::dispatch->AllocationCopy2DRange = (AllocationCopy2DRangeFnPtr)dlsym(handle, "rsAllocationCopy2DRange");
    279     if (RS::dispatch->AllocationCopy2DRange == NULL) {
    280         ALOGV("Couldn't initialize RS::dispatch->AllocationCopy2DRange");
    281         return false;
    282     }
    283     RS::dispatch->AllocationCopy3DRange = (AllocationCopy3DRangeFnPtr)dlsym(handle, "rsAllocationCopy3DRange");
    284     if (RS::dispatch->AllocationCopy3DRange == NULL) {
    285         ALOGV("Couldn't initialize RS::dispatch->AllocationCopy3DRange");
    286         return false;
    287     }
    288     RS::dispatch->SamplerCreate = (SamplerCreateFnPtr)dlsym(handle, "rsSamplerCreate");
    289     if (RS::dispatch->SamplerCreate == NULL) {
    290         ALOGV("Couldn't initialize RS::dispatch->SamplerCreate");
    291         return false;
    292     }
    293     RS::dispatch->ScriptBindAllocation = (ScriptBindAllocationFnPtr)dlsym(handle, "rsScriptBindAllocation");
    294     if (RS::dispatch->ScriptBindAllocation == NULL) {
    295         ALOGV("Couldn't initialize RS::dispatch->ScriptBindAllocation");
    296         return false;
    297     }
    298     RS::dispatch->ScriptSetTimeZone = (ScriptSetTimeZoneFnPtr)dlsym(handle, "rsScriptSetTimeZone");
    299     if (RS::dispatch->ScriptSetTimeZone == NULL) {
    300         ALOGV("Couldn't initialize RS::dispatch->ScriptSetTimeZone");
    301         return false;
    302     }
    303     RS::dispatch->ScriptInvoke = (ScriptInvokeFnPtr)dlsym(handle, "rsScriptInvoke");
    304     if (RS::dispatch->ScriptInvoke == NULL) {
    305         ALOGV("Couldn't initialize RS::dispatch->ScriptInvoke");
    306         return false;
    307     }
    308     RS::dispatch->ScriptInvokeV = (ScriptInvokeVFnPtr)dlsym(handle, "rsScriptInvokeV");
    309     if (RS::dispatch->ScriptInvokeV == NULL) {
    310         ALOGV("Couldn't initialize RS::dispatch->ScriptInvokeV");
    311         return false;
    312     }
    313     RS::dispatch->ScriptForEach = (ScriptForEachFnPtr)dlsym(handle, "rsScriptForEach");
    314     if (RS::dispatch->ScriptForEach == NULL) {
    315         ALOGV("Couldn't initialize RS::dispatch->ScriptForEach");
    316         return false;
    317     }
    318     RS::dispatch->ScriptSetVarI = (ScriptSetVarIFnPtr)dlsym(handle, "rsScriptSetVarI");
    319     if (RS::dispatch->ScriptSetVarI == NULL) {
    320         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarI");
    321         return false;
    322     }
    323     RS::dispatch->ScriptSetVarObj = (ScriptSetVarObjFnPtr)dlsym(handle, "rsScriptSetVarObj");
    324     if (RS::dispatch->ScriptSetVarObj == NULL) {
    325         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarObj");
    326         return false;
    327     }
    328     RS::dispatch->ScriptSetVarJ = (ScriptSetVarJFnPtr)dlsym(handle, "rsScriptSetVarJ");
    329     if (RS::dispatch->ScriptSetVarJ == NULL) {
    330         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarJ");
    331         return false;
    332     }
    333     RS::dispatch->ScriptSetVarF = (ScriptSetVarFFnPtr)dlsym(handle, "rsScriptSetVarF");
    334     if (RS::dispatch->ScriptSetVarF == NULL) {
    335         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarF");
    336         return false;
    337     }
    338     RS::dispatch->ScriptSetVarD = (ScriptSetVarDFnPtr)dlsym(handle, "rsScriptSetVarD");
    339     if (RS::dispatch->ScriptSetVarD == NULL) {
    340         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarD");
    341         return false;
    342     }
    343     RS::dispatch->ScriptSetVarV = (ScriptSetVarVFnPtr)dlsym(handle, "rsScriptSetVarV");
    344     if (RS::dispatch->ScriptSetVarV == NULL) {
    345         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarV");
    346         return false;
    347     }
    348     RS::dispatch->ScriptGetVarV = (ScriptGetVarVFnPtr)dlsym(handle, "rsScriptGetVarV");
    349     if (RS::dispatch->ScriptGetVarV == NULL) {
    350         ALOGV("Couldn't initialize RS::dispatch->ScriptGetVarV");
    351         return false;
    352     }
    353     RS::dispatch->ScriptSetVarVE = (ScriptSetVarVEFnPtr)dlsym(handle, "rsScriptSetVarVE");
    354     if (RS::dispatch->ScriptSetVarVE == NULL) {
    355         ALOGV("Couldn't initialize RS::dispatch->ScriptSetVarVE");
    356         return false;
    357     }
    358     RS::dispatch->ScriptCCreate = (ScriptCCreateFnPtr)dlsym(handle, "rsScriptCCreate");
    359     if (RS::dispatch->ScriptCCreate == NULL) {
    360         ALOGV("Couldn't initialize RS::dispatch->ScriptCCreate");
    361         return false;
    362     }
    363     RS::dispatch->ScriptIntrinsicCreate = (ScriptIntrinsicCreateFnPtr)dlsym(handle, "rsScriptIntrinsicCreate");
    364     if (RS::dispatch->ScriptIntrinsicCreate == NULL) {
    365         ALOGV("Couldn't initialize RS::dispatch->ScriptIntrinsicCreate");
    366         return false;
    367     }
    368     RS::dispatch->ScriptKernelIDCreate = (ScriptKernelIDCreateFnPtr)dlsym(handle, "rsScriptKernelIDCreate");
    369     if (RS::dispatch->ScriptKernelIDCreate == NULL) {
    370         ALOGV("Couldn't initialize RS::dispatch->ScriptKernelIDCreate");
    371         return false;
    372     }
    373     RS::dispatch->ScriptFieldIDCreate = (ScriptFieldIDCreateFnPtr)dlsym(handle, "rsScriptFieldIDCreate");
    374     if (RS::dispatch->ScriptFieldIDCreate == NULL) {
    375         ALOGV("Couldn't initialize RS::dispatch->ScriptFieldIDCreate");
    376         return false;
    377     }
    378     RS::dispatch->ScriptGroupCreate = (ScriptGroupCreateFnPtr)dlsym(handle, "rsScriptGroupCreate");
    379     if (RS::dispatch->ScriptGroupCreate == NULL) {
    380         ALOGV("Couldn't initialize RS::dispatch->ScriptGroupCreate");
    381         return false;
    382     }
    383     RS::dispatch->ScriptGroupSetOutput = (ScriptGroupSetOutputFnPtr)dlsym(handle, "rsScriptGroupSetOutput");
    384     if (RS::dispatch->ScriptGroupSetOutput == NULL) {
    385         ALOGV("Couldn't initialize RS::dispatch->ScriptGroupSetOutput");
    386         return false;
    387     }
    388     RS::dispatch->ScriptGroupSetInput = (ScriptGroupSetInputFnPtr)dlsym(handle, "rsScriptGroupSetInput");
    389     if (RS::dispatch->ScriptGroupSetInput == NULL) {
    390         ALOGV("Couldn't initialize RS::dispatch->ScriptGroupSetInput");
    391         return false;
    392     }
    393     RS::dispatch->ScriptGroupExecute = (ScriptGroupExecuteFnPtr)dlsym(handle, "rsScriptGroupExecute");
    394     if (RS::dispatch->ScriptGroupExecute == NULL) {
    395         ALOGV("Couldn't initialize RS::dispatch->ScriptGroupExecute");
    396         return false;
    397     }
    398     RS::dispatch->AllocationIoSend = (AllocationIoSendFnPtr)dlsym(handle, "rsAllocationIoSend");
    399     if (RS::dispatch->AllocationIoSend == NULL) {
    400         ALOGV("Couldn't initialize RS::dispatch->AllocationIoSend");
    401         return false;
    402     }
    403     RS::dispatch->AllocationIoReceive = (AllocationIoReceiveFnPtr)dlsym(handle, "rsAllocationIoReceive");
    404     if (RS::dispatch->AllocationIoReceive == NULL) {
    405         ALOGV("Couldn't initialize RS::dispatch->AllocationIoReceive");
    406         return false;
    407     }
    408     RS::dispatch->AllocationGetPointer = (AllocationGetPointerFnPtr)dlsym(handle, "rsAllocationGetPointer");
    409     if (RS::dispatch->AllocationGetPointer == NULL) {
    410         ALOGV("Couldn't initialize RS::dispatch->AllocationGetPointer");
    411         //return false;
    412     }
    413 
    414     return true;
    415 }
    416 
    417 // this will only open API 19+ libRS
    418 // because that's when we changed libRS to extern "C" entry points
    419 static bool loadSO(const char* filename) {
    420     void* handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
    421     if (handle == NULL) {
    422         ALOGV("couldn't dlopen %s, %s", filename, dlerror());
    423         return false;
    424     }
    425 
    426     if (loadSymbols(handle) == false) {
    427         ALOGV("%s init failed!", filename);
    428         return false;
    429     }
    430     //ALOGE("Successfully loaded %s", filename);
    431     return true;
    432 }
    433 
    434 static uint32_t getProp(const char *str) {
    435 #if !defined(__LP64__) && !defined(RS_SERVER) && defined(HAVE_ANDROID_OS)
    436     char buf[256];
    437     property_get(str, buf, "0");
    438     return atoi(buf);
    439 #else
    440     return 0;
    441 #endif
    442 }
    443 
    444 bool RS::initDispatch(int targetApi) {
    445     pthread_mutex_lock(&gInitMutex);
    446     if (gInitError) {
    447         goto error;
    448     } else if (gInitialized) {
    449         pthread_mutex_unlock(&gInitMutex);
    450         return true;
    451     }
    452 
    453     RS::dispatch = new dispatchTable;
    454 
    455     // attempt to load libRS, load libRSSupport on failure
    456     // if property is set, proceed directly to libRSSupport
    457     if (getProp("debug.rs.forcecompat") == 0) {
    458         usingNative = loadSO("libRS.so");
    459     }
    460     if (usingNative == false) {
    461         if (loadSO("libRSSupport.so") == false) {
    462             ALOGE("Failed to load libRS.so and libRSSupport.so");
    463             goto error;
    464         }
    465     }
    466 
    467     gInitialized = true;
    468 
    469     pthread_mutex_unlock(&gInitMutex);
    470     return true;
    471 
    472  error:
    473     gInitError = 1;
    474     pthread_mutex_unlock(&gInitMutex);
    475     return false;
    476 }
    477 
    478 bool RS::init(std::string &name, int targetApi, uint32_t flags) {
    479     if (mInit) {
    480         return true;
    481     }
    482 
    483     if (initDispatch(targetApi) == false) {
    484         ALOGE("Couldn't initialize dispatch table");
    485         return false;
    486     }
    487 
    488     mCacheDir = name;
    489 
    490     mDev = RS::dispatch->DeviceCreate();
    491     if (mDev == 0) {
    492         ALOGE("Device creation failed");
    493         return false;
    494     }
    495 
    496     if (flags & ~(RS_CONTEXT_SYNCHRONOUS | RS_CONTEXT_LOW_LATENCY |
    497                   RS_CONTEXT_LOW_POWER)) {
    498         ALOGE("Invalid flags passed");
    499         return false;
    500     }
    501 
    502     mContext = RS::dispatch->ContextCreate(mDev, 0, targetApi, RS_CONTEXT_TYPE_NORMAL, flags);
    503     if (mContext == 0) {
    504         ALOGE("Context creation failed");
    505         return false;
    506     }
    507 
    508     pid_t mNativeMessageThreadId;
    509 
    510     int status = pthread_create(&mMessageThreadId, NULL, threadProc, this);
    511     if (status) {
    512         ALOGE("Failed to start RS message thread.");
    513         return false;
    514     }
    515     // Wait for the message thread to be active.
    516     while (!mMessageRun) {
    517         usleep(1000);
    518     }
    519 
    520     mInit = true;
    521 
    522     return true;
    523 }
    524 
    525 void RS::throwError(RSError error, const char *errMsg) {
    526     if (mCurrentError == RS_SUCCESS) {
    527         mCurrentError = error;
    528         ALOGE("RS CPP error: %s", errMsg);
    529     } else {
    530         ALOGE("RS CPP error (masked by previous error): %s", errMsg);
    531     }
    532 }
    533 
    534 RSError RS::getError() {
    535     return mCurrentError;
    536 }
    537 
    538 
    539 void * RS::threadProc(void *vrsc) {
    540     RS *rs = static_cast<RS *>(vrsc);
    541     size_t rbuf_size = 256;
    542     void * rbuf = malloc(rbuf_size);
    543 
    544     RS::dispatch->ContextInitToClient(rs->mContext);
    545     rs->mMessageRun = true;
    546 
    547     while (rs->mMessageRun) {
    548         size_t receiveLen = 0;
    549         uint32_t usrID = 0;
    550         uint32_t subID = 0;
    551         RsMessageToClientType r = RS::dispatch->ContextPeekMessage(rs->mContext,
    552                                                                    &receiveLen, sizeof(receiveLen),
    553                                                                    &usrID, sizeof(usrID));
    554 
    555         if (receiveLen >= rbuf_size) {
    556             rbuf_size = receiveLen + 32;
    557             rbuf = realloc(rbuf, rbuf_size);
    558         }
    559         if (!rbuf) {
    560             ALOGE("RS::message handler realloc error %zu", rbuf_size);
    561             // No clean way to recover now?
    562         }
    563         RS::dispatch->ContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
    564                             &subID, sizeof(subID));
    565 
    566         switch(r) {
    567         case RS_MESSAGE_TO_CLIENT_ERROR:
    568             ALOGE("RS Error %s", (const char *)rbuf);
    569             rs->throwError(RS_ERROR_RUNTIME_ERROR, "Error returned from runtime");
    570             if(rs->mMessageFunc != NULL) {
    571                 rs->mErrorFunc(usrID, (const char *)rbuf);
    572             }
    573             break;
    574         case RS_MESSAGE_TO_CLIENT_NONE:
    575         case RS_MESSAGE_TO_CLIENT_EXCEPTION:
    576         case RS_MESSAGE_TO_CLIENT_RESIZE:
    577             // teardown. But we want to avoid starving other threads during
    578             // teardown by yielding until the next line in the destructor can
    579             // execute to set mRun = false. Note that the FIFO sends an
    580             // empty NONE message when it reaches its destructor.
    581             usleep(1000);
    582             break;
    583         case RS_MESSAGE_TO_CLIENT_USER:
    584             if(rs->mMessageFunc != NULL) {
    585                 rs->mMessageFunc(usrID, rbuf, receiveLen);
    586             } else {
    587                 ALOGE("Received a message from the script with no message handler installed.");
    588             }
    589             break;
    590 
    591         default:
    592             ALOGE("RS unknown message type %i", r);
    593         }
    594     }
    595 
    596     if (rbuf) {
    597         free(rbuf);
    598     }
    599     ALOGV("RS Message thread exiting.");
    600     return NULL;
    601 }
    602 
    603 void RS::setErrorHandler(ErrorHandlerFunc_t func) {
    604     mErrorFunc = func;
    605 }
    606 
    607 void RS::setMessageHandler(MessageHandlerFunc_t func) {
    608     mMessageFunc  = func;
    609 }
    610 
    611 void RS::finish() {
    612     RS::dispatch->ContextFinish(mContext);
    613 }
    614