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Fix PR apache#15489 (Dynamic Library Loading Support) (apache#15760)
* Dynamic Library Loading Support (apache#15489) * Accelerator APIs header file * adding example to test accelerator loading * adding c_api function header * modifying header file path * creating templates for call to lib fns * modifying target to mxnet_static for libdl * rebaseing with master * returning nullptr handle if library not loaded * refactoring code to load libraries dynamically * addressing review comments * using static cast * pylint fix * moving library.h file to src/common/ * adding dynamic loading support for windows * updating header guard * fixing headers * fixing windows casting error * declaring library functions for windows * adding library testing module in examples * adding unit test to test library loading * correcting file names * updating error messages * getting error message from DL library * adding unit test to gpu suite * correcting windows pointer * requiring absolute path to library * changing file description * addressing review comments - adding more docs, windows error msg * addressing PR comments * checking machine type for unit test * “re-trigger” * added map to store loaded libraries * added dlclose calls in naive & threaded engines * removed library map declaration in cc file * added windows free * fixed formatting * added cast to HMODULE for void* for windows * retrigger CI for flaky unix_cpu * build library and stash it in CI * modifying unittest to use CI built binary * Retrigger CI * adding dlclose to initialize destructor * adding sample_lib target to all in Makefile
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| # 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. | ||
|
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| all: | ||
| g++ -shared -fPIC mylib.cc -o mylib.so -I ../../include/mxnet | ||
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| test: | ||
| g++ -std=c++11 -O3 -o libtest libtest.cc -ldl -I ../../include/mxnet | ||
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| windows: | ||
| cl /LD mylib.cc | ||
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| win_test: | ||
| cl libtest.cc | ||
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| clean: | ||
| rm -rf mylib.so libtest |
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| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| /*! | ||
| * Copyright (c) 2015 by Contributors | ||
| * \file libtest.cc | ||
| * \brief This test checks if the library is implemented correctly | ||
| * and does not involve dynamic loading of library into MXNet | ||
| * This test is supposed to be run before test.py | ||
| */ | ||
|
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| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| #include <windows.h> | ||
| #else | ||
| #include <dlfcn.h> | ||
| #endif | ||
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| #include <iostream> | ||
| #include "lib_api.h" | ||
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| #define MXNET_VERSION 10500 | ||
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| int main(void) { | ||
| // Get a handle to the library. | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| HINSTANCE handle; | ||
| handle = LoadLibrary(TEXT("mylib.dll")); | ||
| #else | ||
| void *handle; | ||
| handle = dlopen("mylib.so", RTLD_LAZY); | ||
| #endif | ||
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| if (!handle) { | ||
| std::cerr << "Unable to load library" << std::endl; | ||
| return 1; | ||
| } | ||
|
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| // get initialize function address from the library | ||
| initialize_t init_lib; | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| init_lib = (initialize_t) GetProcAddress(handle, MXLIB_INITIALIZE_STR); | ||
| #else | ||
| init_lib = (initialize_t) dlsym(handle, MXLIB_INITIALIZE_STR); | ||
| #endif | ||
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| if (!init_lib) { | ||
| std::cerr << "Unable to get function 'intialize' from library" << std::endl; | ||
| return 1; | ||
| } | ||
|
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| // Call the function. | ||
| (init_lib)(MXNET_VERSION); | ||
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| // Deallocate memory. | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| FreeLibrary(handle); | ||
| #else | ||
| dlclose(handle); | ||
| #endif | ||
|
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| return 0; | ||
| } |
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|---|---|---|
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| /* | ||
| * 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. | ||
| */ | ||
|
|
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| /*! | ||
| * Copyright (c) 2015 by Contributors | ||
| * \file mylib.cc | ||
| * \brief Sample library file | ||
| */ | ||
|
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| #include <iostream> | ||
| #include "lib_api.h" | ||
|
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| int initialize(int version) { | ||
| if (version >= 10400) { | ||
| std::cout << "MXNet version " << version << " supported" << std::endl; | ||
| return 1; | ||
| } else { | ||
| std::cout << "MXNet version " << version << " not supported" << std::endl; | ||
| return 0; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,31 @@ | ||
| #!/usr/bin/env python3 | ||
|
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| # 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. | ||
|
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| # coding: utf-8 | ||
| # pylint: disable=arguments-differ | ||
|
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| # This test checks if dynamic loading of library into MXNet is successful | ||
|
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| import mxnet as mx | ||
| import os | ||
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| if (os.name=='posix'): | ||
| mx.library.load('mylib.so') | ||
| elif (os.name=='nt'): | ||
| mx.library.load('mylib.dll') |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| /*! | ||
| * Copyright (c) 2015 by Contributors | ||
| * \file lib_api.h | ||
| * \brief APIs to interact with libraries | ||
| */ | ||
| #ifndef MXNET_LIB_API_H_ | ||
| #define MXNET_LIB_API_H_ | ||
|
|
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| /*! | ||
| * \brief Following are the APIs implemented in the external library | ||
| * Each API has a #define string that is used to lookup the function in the library | ||
| * Followed by the function declaration | ||
| */ | ||
| #define MXLIB_INITIALIZE_STR "initialize" | ||
| typedef int (*initialize_t)(int); | ||
|
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| extern "C" { | ||
| /*! | ||
| * \brief Checks if the MXNet version is supported by the library. | ||
| * If supported, initializes the library. | ||
| * \param version MXNet version number passed to library and defined as: | ||
| * MXNET_VERSION = (MXNET_MAJOR*10000 + MXNET_MINOR*100 + MXNET_PATCH) | ||
| * \return Non-zero value on error i.e. library incompatible with passed MXNet version | ||
| */ | ||
| #if defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__) | ||
| __declspec(dllexport) int __cdecl initialize(int); | ||
| #else | ||
| int initialize(int); | ||
| #endif | ||
| } | ||
| #endif // MXNET_LIB_API_H_ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| # 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. | ||
|
|
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| # coding: utf-8 | ||
| """Library management API of mxnet.""" | ||
| from __future__ import absolute_import | ||
| import ctypes | ||
| import os | ||
| from .base import _LIB, check_call, MXNetError | ||
|
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| def load(path): | ||
| """Loads library dynamically. | ||
| Parameters | ||
| --------- | ||
| path : Path to library .so/.dll file | ||
| Returns | ||
| --------- | ||
| void | ||
| """ | ||
| #check if path exists | ||
| if not os.path.exists(path): | ||
| raise MXNetError("load path %s does NOT exist" % path) | ||
| #check if path is an absolute path | ||
| if not os.path.isabs(path): | ||
| raise MXNetError("load path %s is not an absolute path" % path) | ||
| #check if path is to a library file | ||
| _, file_ext = os.path.splitext(path) | ||
| if not file_ext in ['.so', '.dll']: | ||
| raise MXNetError("load path %s is NOT a library file" % path) | ||
|
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| byt_obj = path.encode('utf-8') | ||
| chararr = ctypes.c_char_p(byt_obj) | ||
| check_call(_LIB.MXLoadLib(chararr)) |
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