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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 
     27 #if !defined(RS_SERVER) && defined(HAVE_ANDROID_OS)
     28 #include <cutils/properties.h>
     29 #endif
     30 
     31 using namespace android;
     32 using namespace RSC;
     33 
     34 bool RS::gInitialized = false;
     35 bool RS::usingNative = false;
     36 pthread_mutex_t RS::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
     37 dispatchTable* RS::dispatch = NULL;
     38 static int gInitError = 0;
     39 
     40 RS::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 
     53 RS::~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 
     69 bool RS::init(uint32_t flags) {
     70     return RS::init(RS_VERSION, flags);
     71 }
     72 
     73 static 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
    406 static 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 
    421 static 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 
    431 bool 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 
    465 bool 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 
    505 void 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 
    514 RSError RS::getError() {
    515     return mCurrentError;
    516 }
    517 
    518 
    519 void * 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 
    583 void RS::setErrorHandler(ErrorHandlerFunc_t func) {
    584     mErrorFunc = func;
    585 }
    586 
    587 void RS::setMessageHandler(MessageHandlerFunc_t func) {
    588     mMessageFunc  = func;
    589 }
    590 
    591 void RS::finish() {
    592     RS::dispatch->ContextFinish(mContext);
    593 }
    594