areusch commented on a change in pull request #5921: URL: https://github.com/apache/incubator-tvm/pull/5921#discussion_r452524711
########## File path: src/runtime/crt/common/crt_runtime_api.c ########## @@ -0,0 +1,335 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +// LINT_C_FILE + +#include <assert.h> +#include <inttypes.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <tvm/runtime/c_runtime_api.h> +#include <tvm/runtime/crt/func_registry.h> +#include <tvm/runtime/crt/internal/common/ndarray.h> +#include <tvm/runtime/crt/internal/common/packed_func.h> +#include <tvm/runtime/crt/internal/graph_runtime/graph_runtime.h> +#include <tvm/runtime/crt/memory.h> +#include <tvm/runtime/crt/platform.h> + +// Handle internal errors + +static char g_last_error[1024]; + +void TVMAPISetLastError(const char* msg) { strncpy(g_last_error, msg, sizeof(g_last_error)); } + +__attribute__((format(printf, 1, 2))) int TVMAPIErrorf(const char* msg, ...) { + va_list args; + int to_return; + + va_start(args, msg); + to_return = vsnprintf(g_last_error, sizeof(g_last_error), msg, args); + va_end(args); + + return to_return; +} + +const char* TVMGetLastError(void) { return g_last_error; } + +// Manipulate NDArray on target device + +int TVMArrayAlloc(const tvm_index_t* shape, int ndim, int dtype_code, int dtype_bits, + int dtype_lanes, int device_type, int device_id, TVMArrayHandle* out) { + DLDataType dtype; + dtype.code = dtype_code; + dtype.bits = dtype_bits; + dtype.lanes = dtype_lanes; + DLContext ctx; + ctx.device_type = (DLDeviceType)device_type; + ctx.device_id = device_id; + TVMNDArray arr = TVMNDArray_Empty(ndim, shape, dtype, ctx); + **out = arr.dl_tensor; + return 0; +} + +int TVMArrayFree(TVMArrayHandle handle) { + TVMNDArray arr; + arr.dl_tensor = *handle; + return TVMNDArray_Release(&arr); +} + +int TVMDeviceAllocDataSpace(DLContext ctx, size_t nbytes, size_t alignment, DLDataType type_hint, + void** out_data) { + if (alignment != 1) { + nbytes = (nbytes + alignment - 1) / alignment * alignment; + } + + *out_data = vmalloc(nbytes); + return 0; +} + +int TVMDeviceFreeDataSpace(TVMContext ctx, void* ptr) { + vfree(ptr); + return 0; +} + +int TVMDeviceCopyDataFromTo(const void* from, size_t from_offset, void* to, size_t to_offset, + size_t num_bytes, TVMContext ctx_from, TVMContext ctx_to, + DLDataType type_hint, TVMStreamHandle stream) { + memcpy(((uint8_t*)to) + to_offset, ((uint8_t*)from) + from_offset, num_bytes); + return 0; +} + +int TVMSynchronize(int device_type, int device_id, TVMStreamHandle stream) { return 0; } + +static TVMMutableFuncRegistry global_func_registry; + +int TVMFuncRegisterGlobal(const char* name, TVMFunctionHandle f, int override) { + return TVMMutableFuncRegistry_Set(&global_func_registry, name, f, override != 0); +} + +static const TVMModule* registered_modules[TVM_CRT_MAX_REGISTERED_MODULES]; + +/*! \brief Passed as `module_index` to EncodeFunctionHandle. */ +static const tvm_module_index_t kGlobalFuncModuleIndex = TVM_CRT_MAX_REGISTERED_MODULES; + +static int DecodeModuleHandle(TVMModuleHandle handle, tvm_module_index_t* out_module_index) { + tvm_module_index_t module_index; + + module_index = ((tvm_module_index_t)((uintptr_t)handle)) & ~0x8000; + if (module_index > TVM_CRT_MAX_REGISTERED_MODULES || registered_modules[module_index] == NULL) { + TVMAPIErrorf("invalid module handle: %08x", module_index); + return -1; + } + + *out_module_index = module_index; + return 0; +} + +static TVMModuleHandle EncodeModuleHandle(tvm_module_index_t module_index) { + return (TVMModuleHandle)((uintptr_t)(module_index | 0x8000)); +} + +static int _TVMModCreateFromCModule(const TVMModule* mod, TVMModuleHandle* out_handle) { + tvm_module_index_t idx; + + for (idx = 0; idx < TVM_CRT_MAX_REGISTERED_MODULES; idx++) { + if (registered_modules[idx] == NULL) { + registered_modules[idx] = mod; + *out_handle = EncodeModuleHandle(idx); + return 0; + } + } + + return -1; +} + +int TVMModFree(TVMModuleHandle mod) { + tvm_module_index_t module_index; + if (DecodeModuleHandle(mod, &module_index) != 0) { + return -1; + } + + registered_modules[module_index] = NULL; + return 0; +} + +static const TVMModuleHandle kTVMModuleHandleUninitialized = (TVMModuleHandle)(~0UL); + +static TVMModuleHandle system_lib_handle; + +int SystemLibraryCreate(TVMValue* args, int* type_codes, int num_args, TVMValue* ret_val, + int* ret_type_codes) { + const TVMModule* system_lib; + + if (system_lib_handle == kTVMModuleHandleUninitialized) { + system_lib = TVMSystemLibEntryPoint(); + if (_TVMModCreateFromCModule(system_lib, &system_lib_handle) != 0) { + TVMAPIErrorf("error registering system lib"); + return -1; + } + } + + ret_val[0].v_handle = system_lib_handle; + ret_type_codes[0] = kTVMModuleHandle; + return 0; +} + +static TVMFunctionHandle EncodeFunctionHandle(tvm_module_index_t module_index, + tvm_function_index_t function_index) { + return (TVMFunctionHandle)((uintptr_t)( + ((module_index | 0x8000) << (sizeof(tvm_function_index_t) * 8)) | (function_index | 0x8000))); Review comment: I left this in so that all valid TVMFunctionHandle are non-zero ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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