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++ // Copyright 2009-2021 Intel Corporation
++ // SPDX-License-Identifier: Apache-2.0
++
++ #include "device.h"
++ #include "../hash.h"
++ #include "scene_triangle_mesh.h"
++ #include "scene_user_geometry.h"
++ #include "scene_instance.h"
++ #include "scene_curves.h"
++ #include "scene_subdiv_mesh.h"
++
++ #include "../subdiv/tessellation_cache.h"
++
++ #include "acceln.h"
++ #include "geometry.h"
++
++ #include "../geometry/cylinder.h"
++
++ #include "../bvh/bvh4_factory.h"
++ #include "../bvh/bvh8_factory.h"
++
++ #include "../../common/tasking/taskscheduler.h"
++ #include "../../common/sys/alloc.h"
++
++ namespace embree
++ {
++ /*! some global variables that can be set via rtcSetParameter1i for debugging purposes */
++ ssize_t Device::debug_int0 = 0;
++ ssize_t Device::debug_int1 = 0;
++ ssize_t Device::debug_int2 = 0;
++ ssize_t Device::debug_int3 = 0;
++
++ DECLARE_SYMBOL2(RayStreamFilterFuncs,rayStreamFilterFuncs);
++
++ static MutexSys g_mutex;
++ static std::map<Device*,size_t> g_cache_size_map;
++ static std::map<Device*,size_t> g_num_threads_map;
++
++ Device::Device (const char* cfg)
++ {
++ /* check that CPU supports lowest ISA */
++ if (!hasISA(ISA)) {
++ throw_RTCError(RTC_ERROR_UNSUPPORTED_CPU,"CPU does not support " ISA_STR);
++ }
++
++ /* set default frequency level for detected CPU */
++ switch (getCPUModel()) {
++ case CPU::UNKNOWN: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::XEON_ICE_LAKE: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::CORE_ICE_LAKE: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::CORE_TIGER_LAKE: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE_COMET_LAKE: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE_CANNON_LAKE:frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE_KABY_LAKE: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::XEON_SKY_LAKE: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE_SKY_LAKE: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::XEON_BROADWELL: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::CORE_BROADWELL: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::XEON_HASWELL: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::CORE_HASWELL: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::XEON_IVY_BRIDGE: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::CORE_IVY_BRIDGE: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::SANDY_BRIDGE: frequency_level = FREQUENCY_SIMD256; break;
++ case CPU::NEHALEM: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE2: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::CORE1: frequency_level = FREQUENCY_SIMD128; break;
++ case CPU::XEON_PHI_KNIGHTS_MILL : frequency_level = FREQUENCY_SIMD512; break;
++ case CPU::XEON_PHI_KNIGHTS_LANDING: frequency_level = FREQUENCY_SIMD512; break;
++ case CPU::ARM: frequency_level = FREQUENCY_SIMD128; break;
++ }
++
++ /* initialize global state */
++ #if defined(EMBREE_CONFIG)
++ State::parseString(EMBREE_CONFIG);
++ #endif
++ State::parseString(cfg);
++ State::verify();
++
++ /* check whether selected ISA is supported by the HW, as the user could have forced an unsupported ISA */
++ if (!checkISASupport()) {
++ throw_RTCError(RTC_ERROR_UNSUPPORTED_CPU,"CPU does not support selected ISA");
++ }
++
++ /*! do some internal tests */
++ assert(isa::Cylinder::verify());
++
++ /*! enable huge page support if desired */
++ #if defined(__WIN32__)
++ if (State::enable_selockmemoryprivilege)
++ State::hugepages_success &= win_enable_selockmemoryprivilege(State::verbosity(3));
++ #endif
++ State::hugepages_success &= os_init(State::hugepages,State::verbosity(3));
++
++ /*! set tessellation cache size */
++ setCacheSize( State::tessellation_cache_size );
++
++ /*! enable some floating point exceptions to catch bugs */
++ if (State::float_exceptions)
++ {
++ int exceptions = _MM_MASK_MASK;
++ //exceptions &= ~_MM_MASK_INVALID;
++ exceptions &= ~_MM_MASK_DENORM;
++ exceptions &= ~_MM_MASK_DIV_ZERO;
++ //exceptions &= ~_MM_MASK_OVERFLOW;
++ //exceptions &= ~_MM_MASK_UNDERFLOW;
++ //exceptions &= ~_MM_MASK_INEXACT;
++ _MM_SET_EXCEPTION_MASK(exceptions);
++ }
++
++ /* print info header */
++ if (State::verbosity(1))
++ print();
++ if (State::verbosity(2))
++ State::print();
++
++ /* register all algorithms */
++ bvh4_factory = make_unique(new BVH4Factory(enabled_builder_cpu_features, enabled_cpu_features));
++
++ #if defined(EMBREE_TARGET_SIMD8)
++ bvh8_factory = make_unique(new BVH8Factory(enabled_builder_cpu_features, enabled_cpu_features));
++ #endif
++
++ /* setup tasking system */
++ initTaskingSystem(numThreads);
++
++ /* ray stream SOA to AOS conversion */
++ #if defined(EMBREE_RAY_PACKETS)
++ RayStreamFilterFuncsType rayStreamFilterFuncs;
++ SELECT_SYMBOL_DEFAULT_SSE42_AVX_AVX2_AVX512(enabled_cpu_features,rayStreamFilterFuncs);
++ rayStreamFilters = rayStreamFilterFuncs();
++ #endif
++ }
++
++ Device::~Device ()
++ {
++ setCacheSize(0);
++ exitTaskingSystem();
++ }
++
++ std::string getEnabledTargets()
++ {
++ std::string v;
++ #if defined(EMBREE_TARGET_SSE2)
++ v += "SSE2 ";
++ #endif
++ #if defined(EMBREE_TARGET_SSE42)
++ v += "SSE4.2 ";
++ #endif
++ #if defined(EMBREE_TARGET_AVX)
++ v += "AVX ";
++ #endif
++ #if defined(EMBREE_TARGET_AVX2)
++ v += "AVX2 ";
++ #endif
++ #if defined(EMBREE_TARGET_AVX512)
++ v += "AVX512 ";
++ #endif
++ return v;
++ }
++
++ std::string getEmbreeFeatures()
++ {
++ std::string v;
++ #if defined(EMBREE_RAY_MASK)
++ v += "raymasks ";
++ #endif
++ #if defined (EMBREE_BACKFACE_CULLING)
++ v += "backfaceculling ";
++ #endif
++ #if defined (EMBREE_BACKFACE_CULLING_CURVES)
++ v += "backfacecullingcurves ";
++ #endif
++ #if defined(EMBREE_FILTER_FUNCTION)
++ v += "intersection_filter ";
++ #endif
++ #if defined (EMBREE_COMPACT_POLYS)
++ v += "compact_polys ";
++ #endif
++ return v;
++ }
++
++ void Device::print()
++ {
++ const int cpu_features = getCPUFeatures();
++ std::cout << std::endl;
++ std::cout << "Embree Ray Tracing Kernels " << RTC_VERSION_STRING << " (" << RTC_HASH << ")" << std::endl;
++ std::cout << " Compiler : " << getCompilerName() << std::endl;
++ std::cout << " Build : ";
++ #if defined(DEBUG)
++ std::cout << "Debug " << std::endl;
++ #else
++ std::cout << "Release " << std::endl;
++ #endif
++ std::cout << " Platform : " << getPlatformName() << std::endl;
++ std::cout << " CPU : " << stringOfCPUModel(getCPUModel()) << " (" << getCPUVendor() << ")" << std::endl;
++ std::cout << " Threads : " << getNumberOfLogicalThreads() << std::endl;
++ std::cout << " ISA : " << stringOfCPUFeatures(cpu_features) << std::endl;
++ std::cout << " Targets : " << supportedTargetList(cpu_features) << std::endl;
++ const bool hasFTZ = _mm_getcsr() & _MM_FLUSH_ZERO_ON;
++ const bool hasDAZ = _mm_getcsr() & _MM_DENORMALS_ZERO_ON;
++ std::cout << " MXCSR : " << "FTZ=" << hasFTZ << ", DAZ=" << hasDAZ << std::endl;
++ std::cout << " Config" << std::endl;
++ std::cout << " Threads : " << (numThreads ? toString(numThreads) : std::string("default")) << std::endl;
++ std::cout << " ISA : " << stringOfCPUFeatures(enabled_cpu_features) << std::endl;
++ std::cout << " Targets : " << supportedTargetList(enabled_cpu_features) << " (supported)" << std::endl;
++ std::cout << " " << getEnabledTargets() << " (compile time enabled)" << std::endl;
++ std::cout << " Features: " << getEmbreeFeatures() << std::endl;
++ std::cout << " Tasking : ";
++ #if defined(TASKING_TBB)
++ std::cout << "TBB" << TBB_VERSION_MAJOR << "." << TBB_VERSION_MINOR << " ";
++ #if TBB_INTERFACE_VERSION >= 12002
++ std::cout << "TBB_header_interface_" << TBB_INTERFACE_VERSION << " TBB_lib_interface_" << TBB_runtime_interface_version() << " ";
++ #else
++ std::cout << "TBB_header_interface_" << TBB_INTERFACE_VERSION << " TBB_lib_interface_" << tbb::TBB_runtime_interface_version() << " ";
++ #endif
++ #endif
++ #if defined(TASKING_INTERNAL)
++ std::cout << "internal_tasking_system ";
++ #endif
++ #if defined(TASKING_PPL)
++ std::cout << "PPL ";
++ #endif
++ std::cout << std::endl;
++
++ /* check of FTZ and DAZ flags are set in CSR */
++ if (!hasFTZ || !hasDAZ)
++ {
++ #if !defined(_DEBUG)
++ if (State::verbosity(1))
++ #endif
++ {
++ std::cout << std::endl;
++ std::cout << "================================================================================" << std::endl;
++ std::cout << " WARNING: \"Flush to Zero\" or \"Denormals are Zero\" mode not enabled " << std::endl
++ << " in the MXCSR control and status register. This can have a severe " << std::endl
++ << " performance impact. Please enable these modes for each application " << std::endl
++ << " thread the following way:" << std::endl
++ << std::endl
++ << " #include \"xmmintrin.h\"" << std::endl
++ << " #include \"pmmintrin.h\"" << std::endl
++ << std::endl
++ << " _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);" << std::endl
++ << " _MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);" << std::endl;
++ std::cout << "================================================================================" << std::endl;
++ std::cout << std::endl;
++ }
++ }
++ std::cout << std::endl;
++ }
++
++ void Device::setDeviceErrorCode(RTCError error)
++ {
++ RTCError* stored_error = errorHandler.error();
++ if (*stored_error == RTC_ERROR_NONE)
++ *stored_error = error;
++ }
++
++ RTCError Device::getDeviceErrorCode()
++ {
++ RTCError* stored_error = errorHandler.error();
++ RTCError error = *stored_error;
++ *stored_error = RTC_ERROR_NONE;
++ return error;
++ }
++
++ void Device::setThreadErrorCode(RTCError error)
++ {
++ RTCError* stored_error = g_errorHandler.error();
++ if (*stored_error == RTC_ERROR_NONE)
++ *stored_error = error;
++ }
++
++ RTCError Device::getThreadErrorCode()
++ {
++ RTCError* stored_error = g_errorHandler.error();
++ RTCError error = *stored_error;
++ *stored_error = RTC_ERROR_NONE;
++ return error;
++ }
++
++ void Device::process_error(Device* device, RTCError error, const char* str)
++ {
++ /* store global error code when device construction failed */
++ if (!device)
++ return setThreadErrorCode(error);
++
++ /* print error when in verbose mode */
++ if (device->verbosity(1))
++ {
++ switch (error) {
++ case RTC_ERROR_NONE : std::cerr << "Embree: No error"; break;
++ case RTC_ERROR_UNKNOWN : std::cerr << "Embree: Unknown error"; break;
++ case RTC_ERROR_INVALID_ARGUMENT : std::cerr << "Embree: Invalid argument"; break;
++ case RTC_ERROR_INVALID_OPERATION: std::cerr << "Embree: Invalid operation"; break;
++ case RTC_ERROR_OUT_OF_MEMORY : std::cerr << "Embree: Out of memory"; break;
++ case RTC_ERROR_UNSUPPORTED_CPU : std::cerr << "Embree: Unsupported CPU"; break;
++ default : std::cerr << "Embree: Invalid error code"; break;
++ };
++ if (str) std::cerr << ", (" << str << ")";
++ std::cerr << std::endl;
++ }
++
++ /* call user specified error callback */
++ if (device->error_function)
++ device->error_function(device->error_function_userptr,error,str);
++
++ /* record error code */
++ device->setDeviceErrorCode(error);
++ }
++
++ void Device::memoryMonitor(ssize_t bytes, bool post)
++ {
++ if (State::memory_monitor_function && bytes != 0) {
++ if (!State::memory_monitor_function(State::memory_monitor_userptr,bytes,post)) {
++ if (bytes > 0) { // only throw exception when we allocate memory to never throw inside a destructor
++ throw_RTCError(RTC_ERROR_OUT_OF_MEMORY,"memory monitor forced termination");
++ }
++ }
++ }
++ }
++
++ size_t getMaxNumThreads()
++ {
++ size_t maxNumThreads = 0;
++ for (std::map<Device*,size_t>::iterator i=g_num_threads_map.begin(); i != g_num_threads_map.end(); i++)
++ maxNumThreads = max(maxNumThreads, (*i).second);
++ if (maxNumThreads == 0)
++ maxNumThreads = std::numeric_limits<size_t>::max();
++ return maxNumThreads;
++ }
++
++ size_t getMaxCacheSize()
++ {
++ size_t maxCacheSize = 0;
++ for (std::map<Device*,size_t>::iterator i=g_cache_size_map.begin(); i!= g_cache_size_map.end(); i++)
++ maxCacheSize = max(maxCacheSize, (*i).second);
++ return maxCacheSize;
++ }
++
++ void Device::setCacheSize(size_t bytes)
++ {
++ #if defined(EMBREE_GEOMETRY_SUBDIVISION)
++ Lock<MutexSys> lock(g_mutex);
++ if (bytes == 0) g_cache_size_map.erase(this);
++ else g_cache_size_map[this] = bytes;
++
++ size_t maxCacheSize = getMaxCacheSize();
++ resizeTessellationCache(maxCacheSize);
++ #endif
++ }
++
++ void Device::initTaskingSystem(size_t numThreads)
++ {
++ Lock<MutexSys> lock(g_mutex);
++ if (numThreads == 0)
++ g_num_threads_map[this] = std::numeric_limits<size_t>::max();
++ else
++ g_num_threads_map[this] = numThreads;
++
++ /* create task scheduler */
++ size_t maxNumThreads = getMaxNumThreads();
++ TaskScheduler::create(maxNumThreads,State::set_affinity,State::start_threads);
++ #if USE_TASK_ARENA
++ const size_t nThreads = min(maxNumThreads,TaskScheduler::threadCount());
++ const size_t uThreads = min(max(numUserThreads,(size_t)1),nThreads);
++ arena = make_unique(new tbb::task_arena((int)nThreads,(unsigned int)uThreads));
++ #endif
++ }
++
++ void Device::exitTaskingSystem()
++ {
++ Lock<MutexSys> lock(g_mutex);
++ g_num_threads_map.erase(this);
++
++ /* terminate tasking system */
++ if (g_num_threads_map.size() == 0) {
++ TaskScheduler::destroy();
++ }
++ /* or configure new number of threads */
++ else {
++ size_t maxNumThreads = getMaxNumThreads();
++ TaskScheduler::create(maxNumThreads,State::set_affinity,State::start_threads);
++ }
++ #if USE_TASK_ARENA
++ arena.reset();
++ #endif
++ }
++
++ void Device::setProperty(const RTCDeviceProperty prop, ssize_t val)
++ {
++ /* hidden internal properties */
++ switch ((size_t)prop)
++ {
++ case 1000000: debug_int0 = val; return;
++ case 1000001: debug_int1 = val; return;
++ case 1000002: debug_int2 = val; return;
++ case 1000003: debug_int3 = val; return;
++ }
++
++ throw_RTCError(RTC_ERROR_INVALID_ARGUMENT, "unknown writable property");
++ }
++
++ ssize_t Device::getProperty(const RTCDeviceProperty prop)
++ {
++ size_t iprop = (size_t)prop;
++
++ /* get name of internal regression test */
++ if (iprop >= 2000000 && iprop < 3000000)
++ {
++ RegressionTest* test = getRegressionTest(iprop-2000000);
++ if (test) return (ssize_t) test->name.c_str();
++ else return 0;
++ }
++
++ /* run internal regression test */
++ if (iprop >= 3000000 && iprop < 4000000)
++ {
++ RegressionTest* test = getRegressionTest(iprop-3000000);
++ if (test) return test->run();
++ else return 0;
++ }
++
++ /* documented properties */
++ switch (prop)
++ {
++ case RTC_DEVICE_PROPERTY_VERSION_MAJOR: return RTC_VERSION_MAJOR;
++ case RTC_DEVICE_PROPERTY_VERSION_MINOR: return RTC_VERSION_MINOR;
++ case RTC_DEVICE_PROPERTY_VERSION_PATCH: return RTC_VERSION_PATCH;
++ case RTC_DEVICE_PROPERTY_VERSION : return RTC_VERSION;
++
++ #if defined(EMBREE_TARGET_SIMD4) && defined(EMBREE_RAY_PACKETS)
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY4_SUPPORTED: return hasISA(SSE2);
++ #else
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY4_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_TARGET_SIMD8) && defined(EMBREE_RAY_PACKETS)
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY8_SUPPORTED: return hasISA(AVX);
++ #else
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY8_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_TARGET_SIMD16) && defined(EMBREE_RAY_PACKETS)
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY16_SUPPORTED: return hasISA(AVX512);
++ #else
++ case RTC_DEVICE_PROPERTY_NATIVE_RAY16_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_RAY_PACKETS)
++ case RTC_DEVICE_PROPERTY_RAY_STREAM_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_RAY_STREAM_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_RAY_MASK)
++ case RTC_DEVICE_PROPERTY_RAY_MASK_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_RAY_MASK_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_BACKFACE_CULLING)
++ case RTC_DEVICE_PROPERTY_BACKFACE_CULLING_ENABLED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_BACKFACE_CULLING_ENABLED: return 0;
++ #endif
++
++ #if defined(EMBREE_BACKFACE_CULLING_CURVES)
++ case RTC_DEVICE_PROPERTY_BACKFACE_CULLING_CURVES_ENABLED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_BACKFACE_CULLING_CURVES_ENABLED: return 0;
++ #endif
++
++ #if defined(EMBREE_COMPACT_POLYS)
++ case RTC_DEVICE_PROPERTY_COMPACT_POLYS_ENABLED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_COMPACT_POLYS_ENABLED: return 0;
++ #endif
++
++ #if defined(EMBREE_FILTER_FUNCTION)
++ case RTC_DEVICE_PROPERTY_FILTER_FUNCTION_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_FILTER_FUNCTION_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_IGNORE_INVALID_RAYS)
++ case RTC_DEVICE_PROPERTY_IGNORE_INVALID_RAYS_ENABLED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_IGNORE_INVALID_RAYS_ENABLED: return 0;
++ #endif
++
++ #if defined(TASKING_INTERNAL)
++ case RTC_DEVICE_PROPERTY_TASKING_SYSTEM: return 0;
++ #endif
++
++ #if defined(TASKING_TBB)
++ case RTC_DEVICE_PROPERTY_TASKING_SYSTEM: return 1;
++ #endif
++
++ #if defined(TASKING_PPL)
++ case RTC_DEVICE_PROPERTY_TASKING_SYSTEM: return 2;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_TRIANGLE)
++ case RTC_DEVICE_PROPERTY_TRIANGLE_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_TRIANGLE_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_QUAD)
++ case RTC_DEVICE_PROPERTY_QUAD_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_QUAD_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_CURVE)
++ case RTC_DEVICE_PROPERTY_CURVE_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_CURVE_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_SUBDIVISION)
++ case RTC_DEVICE_PROPERTY_SUBDIVISION_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_SUBDIVISION_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_USER)
++ case RTC_DEVICE_PROPERTY_USER_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_USER_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(EMBREE_GEOMETRY_POINT)
++ case RTC_DEVICE_PROPERTY_POINT_GEOMETRY_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_POINT_GEOMETRY_SUPPORTED: return 0;
++ #endif
++
++ #if defined(TASKING_PPL)
++ case RTC_DEVICE_PROPERTY_JOIN_COMMIT_SUPPORTED: return 0;
++ #elif defined(TASKING_TBB) && (TBB_INTERFACE_VERSION_MAJOR < 8)
++ case RTC_DEVICE_PROPERTY_JOIN_COMMIT_SUPPORTED: return 0;
++ #else
++ case RTC_DEVICE_PROPERTY_JOIN_COMMIT_SUPPORTED: return 1;
++ #endif
++
++ #if defined(TASKING_TBB) && TASKING_TBB_USE_TASK_ISOLATION
++ case RTC_DEVICE_PROPERTY_PARALLEL_COMMIT_SUPPORTED: return 1;
++ #else
++ case RTC_DEVICE_PROPERTY_PARALLEL_COMMIT_SUPPORTED: return 0;
++ #endif
++
++ default: throw_RTCError(RTC_ERROR_INVALID_ARGUMENT, "unknown readable property"); break;
++ };
++ }
++ }