junrushao commented on code in PR #191: URL: https://github.com/apache/tvm-ffi/pull/191#discussion_r2463223723
########## examples/stable_c_abi/src/load.c: ########## @@ -0,0 +1,118 @@ +/* + * 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. + */ +// NOLINTBEGIN(modernize-deprecated-headers,modernize-use-nullptr,bugprone-assignment-in-if-condition,modernize-loop-convert) +// [main.begin] +// File: src/load.c +#include <stdio.h> +#include <tvm/ffi/c_api.h> +#include <tvm/ffi/extra/c_env_api.h> + +// Global functions are looked up during `Initialize` and deallocated during `Finalize` +// - global function: "ffi.Module.load_from_file.so" +static TVMFFIObjectHandle fn_load_module = NULL; +// - global function: "ffi.ModuleGetFunction" +static TVMFFIObjectHandle fn_get_function = NULL; + +int Run(DLTensor* x, DLTensor* y) { + int ret_code = 0; + TVMFFIAny call_args[3] = {}; + TVMFFIAny mod = {.type_index = kTVMFFINone, .v_obj = NULL}; + TVMFFIAny func = {.type_index = kTVMFFINone, .v_obj = NULL}; + + // Step 1. Load module + // Equivalent to: + // mod = tvm::ffi::Module::LoadFromFile("build/add_one_cpu.so") + call_args[0] = (TVMFFIAny){.type_index = kTVMFFIRawStr, .v_c_str = "build/add_one_cpu.so"}; + call_args[1] = (TVMFFIAny){.type_index = kTVMFFISmallStr, .v_int64 = 0}; + if ((ret_code = TVMFFIFunctionCall(fn_load_module, call_args, 2, &mod))) goto _RAII; + + // Step 2. Get function `add_one_cpu` from module + // Equivalent to: + // func = mod->GetFunction("add_one_cpu", /*query_imports=*/false).value() + call_args[0] = (TVMFFIAny){.type_index = mod.type_index, .v_obj = mod.v_obj}; + call_args[1] = (TVMFFIAny){.type_index = kTVMFFIRawStr, .v_c_str = "add_one_cpu"}; + call_args[2] = (TVMFFIAny){.type_index = kTVMFFIBool, .v_int64 = 0}; + if ((ret_code = TVMFFIFunctionCall(fn_get_function, call_args, 3, &func))) goto _RAII; + + // Step 3. Call function `add_one_cpu(x, y)` + // Equivalent to: + // func(x, y) + call_args[0] = (TVMFFIAny){.type_index = kTVMFFIDLTensorPtr, .v_ptr = x}; + call_args[1] = (TVMFFIAny){.type_index = kTVMFFIDLTensorPtr, .v_ptr = y}; + if ((ret_code = TVMFFIFunctionCall(func.v_ptr, call_args, 2, &((TVMFFIAny){})))) goto _RAII; + +_RAII: + if (mod.type_index >= kTVMFFIObject && mod.v_obj) TVMFFIObjectDecRef(mod.v_obj); + if (func.type_index >= kTVMFFIObject && func.v_obj) TVMFFIObjectDecRef(func.v_obj); + return ret_code; +} +// [main.end] + +/************* Auxiliary Logics *************/ + +// [aux.begin] +static inline int Initialize() { + int ret_code = 0; + TVMFFIByteArray name_load_module = {.data = "ffi.Module.load_from_file.so", .size = 28}; + TVMFFIByteArray name_get_function = {.data = "ffi.ModuleGetFunction", .size = 21}; + if ((ret_code = TVMFFIFunctionGetGlobal(&name_load_module, &fn_load_module))) return ret_code; + if ((ret_code = TVMFFIFunctionGetGlobal(&name_get_function, &fn_get_function))) return ret_code; + return 0; +} + +static inline void Finalize(int ret_code) { + TVMFFIObjectHandle err = NULL; + TVMFFIErrorCell* cell = NULL; + if (fn_load_module) TVMFFIObjectDecRef(fn_load_module); + if (fn_get_function) TVMFFIObjectDecRef(fn_get_function); + if (ret_code) { + TVMFFIErrorMoveFromRaised(&err); + cell = (TVMFFIErrorCell*)((char*)(err) + sizeof(TVMFFIObject)); + printf("%.*s: %.*s\n", (int)(cell->kind.size), cell->kind.data, (int)(cell->message.size), + cell->message.data); + } +} + +int main() { + Initialize(); + int ret_code = 0; + float x_data[5] = {1.0, 2.0, 3.0, 4.0, 5.0}; + float y_data[5] = {0.0, 0.0, 0.0, 0.0, 0.0}; + int64_t shape[1] = {5}; + int64_t strides[1] = {0}; Review Comment: Good catch! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
