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Revert "Refactor LibraryInitializer so it's thread safe. Fixes random…
… sporadical concurrency crashes. (apache#15762)" This reverts commit bfd3bb8.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
||
| /*! | ||
| * Copyright (c) 2015 by Contributors | ||
| * \file library.cc | ||
| * \brief Dynamically loading accelerator library | ||
| * and accessing its functions | ||
| */ | ||
|
|
||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| #include <windows.h> | ||
| #else | ||
| #include <dlfcn.h> | ||
| #endif | ||
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| #include <string> | ||
| #include "library.h" | ||
|
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| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| /*! | ||
| * \brief Retrieve the system error message for the last-error code | ||
| * \param err string that gets the error message | ||
| */ | ||
| void win_err(char **err) { | ||
| uint32_t dw = GetLastError(); | ||
| FormatMessage( | ||
| FORMAT_MESSAGE_ALLOCATE_BUFFER | | ||
| FORMAT_MESSAGE_FROM_SYSTEM | | ||
| FORMAT_MESSAGE_IGNORE_INSERTS, | ||
| NULL, | ||
| dw, | ||
| MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | ||
| reinterpret_cast<char*>(err), | ||
| 0, NULL); | ||
| } | ||
| #endif | ||
|
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|
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| /*! | ||
| * \brief Loads the dynamic shared library file | ||
| * \param path library file location | ||
| * \return handle a pointer for the loaded library, nullptr if loading unsuccessful | ||
| */ | ||
| void* load_lib(const char* path) { | ||
| void *handle = nullptr; | ||
| std::string path_str(path); | ||
| // check if library was already loaded | ||
| if (loaded_libs.find(path_str) == loaded_libs.end()) { | ||
| // if not, load it | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| handle = LoadLibrary(path); | ||
| if (!handle) { | ||
| char *err_msg = nullptr; | ||
| win_err(&err_msg); | ||
| LOG(FATAL) << "Error loading library: '" << path << "'\n" << err_msg; | ||
| LocalFree(err_msg); | ||
| return nullptr; | ||
| } | ||
| #else | ||
| handle = dlopen(path, RTLD_LAZY); | ||
| if (!handle) { | ||
| LOG(FATAL) << "Error loading library: '" << path << "'\n" << dlerror(); | ||
| return nullptr; | ||
| } | ||
| #endif // _WIN32 or _WIN64 or __WINDOWS__ | ||
| // then store the pointer to the library | ||
| loaded_libs[path_str] = handle; | ||
| } else { | ||
| // otherwise just look up the pointer | ||
| handle = loaded_libs[path_str]; | ||
| } | ||
| return handle; | ||
| } | ||
|
|
||
| /*! | ||
| * \brief Closes the loaded dynamic shared library file | ||
| * \param handle library file handle | ||
| */ | ||
| void close_lib(void* handle) { | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| FreeLibrary((HMODULE)handle); | ||
| #else | ||
| dlclose(handle); | ||
| #endif // _WIN32 or _WIN64 or __WINDOWS__ | ||
| } | ||
|
|
||
| /*! | ||
| * \brief Obtains address of given function in the loaded library | ||
| * \param handle pointer for the loaded library | ||
| * \param func function pointer that gets output address | ||
| * \param name function name to be fetched | ||
| */ | ||
| void get_sym(void* handle, void** func, char* name) { | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| *func = GetProcAddress((HMODULE)handle, name); | ||
| if (!(*func)) { | ||
| char *err_msg = nullptr; | ||
| win_err(&err_msg); | ||
| LOG(FATAL) << "Error getting function '" << name << "' from library\n" << err_msg; | ||
| LocalFree(err_msg); | ||
| } | ||
| #else | ||
| *func = dlsym(handle, name); | ||
| if (!(*func)) { | ||
| LOG(FATAL) << "Error getting function '" << name << "' from library\n" << dlerror(); | ||
| } | ||
| #endif // _WIN32 or _WIN64 or __WINDOWS__ | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
||
| /*! | ||
| * Copyright (c) 2015 by Contributors | ||
| * \file library.h | ||
| * \brief Defining library loading functions | ||
| */ | ||
| #ifndef MXNET_COMMON_LIBRARY_H_ | ||
| #define MXNET_COMMON_LIBRARY_H_ | ||
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| #include <iostream> | ||
| #include <map> | ||
| #include <string> | ||
| #include "dmlc/io.h" | ||
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| // map of libraries loaded | ||
| static std::map<std::string, void*> loaded_libs; | ||
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| void* load_lib(const char* path); | ||
| void close_lib(void* handle); | ||
| void get_sym(void* handle, void** func, char* name); | ||
|
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| /*! | ||
| * \brief a templated function that fetches from the library | ||
| * a function pointer of any given datatype and name | ||
| * \param T a template parameter for data type of function pointer | ||
| * \param lib library handle | ||
| * \param func_name function name to search for in the library | ||
| * \return func a function pointer | ||
| */ | ||
| template<typename T> | ||
| T get_func(void *lib, char *func_name) { | ||
| T func; | ||
| get_sym(lib, reinterpret_cast<void**>(&func), func_name); | ||
| if (!func) | ||
| LOG(FATAL) << "Unable to get function '" << func_name << "' from library"; | ||
| return func; | ||
| } | ||
|
|
||
| #endif // MXNET_COMMON_LIBRARY_H_ |
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