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[C API] add in C API for symbolic (#3)
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| Original file line number | Diff line number | Diff line change |
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| /*! | ||
| * Copyright (c) 2016 by Contributors | ||
| * \file c_api.h | ||
| * \brief C API of NNVM symbolic construction and pass. | ||
| * Enables construction and transformation of Graph | ||
| * in any other host languages. | ||
| */ | ||
| #ifndef NNVM_C_API_H_ | ||
| #define NNVM_C_API_H_ | ||
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| #ifdef __cplusplus | ||
| #define NNVM_EXTERN_C extern "C" | ||
| #endif | ||
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| /*! \brief NNVM_DLL prefix for windows */ | ||
| #ifdef _WIN32 | ||
| #ifdef NNVM_EXPORTS | ||
| #define NNVM_DLL NNVM_EXTERN_C __declspec(dllexport) | ||
| #else | ||
| #define NNVM_DLL NNVM_EXTERN_C __declspec(dllimport) | ||
| #endif | ||
| #else | ||
| #define NNVM_DLL NNVM_EXTERN_C | ||
| #endif | ||
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| /*! \brief manually define unsigned int */ | ||
| typedef unsigned int nn_uint; | ||
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| /*! \brief handle to a function that takes param and creates symbol */ | ||
| typedef void *AtomicSymbolCreator; | ||
| /*! \brief handle to a symbol that can be bind as operator */ | ||
| typedef void *SymbolHandle; | ||
| /*! \brief handle to a AtomicSymbol */ | ||
| typedef void *AtomicSymbolHandle; | ||
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| /*! | ||
| * \brief return str message of the last error | ||
| * all function in this file will return 0 when success | ||
| * and -1 when an error occured, | ||
| * NNGetLastError can be called to retrieve the error | ||
| * | ||
| * this function is threadsafe and can be called by different thread | ||
| * \return error info | ||
| */ | ||
| NNVM_DLL const char *NNGetLastError(); | ||
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| /*! | ||
| * \brief list all the available AtomicSymbolEntry | ||
| * \param out_size the size of returned array | ||
| * \param out_array the output AtomicSymbolCreator array | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolListAtomicSymbolCreators(nn_uint *out_size, | ||
| AtomicSymbolCreator **out_array); | ||
| /*! | ||
| * \brief Get the detailed information about atomic symbol. | ||
| * \param creator the AtomicSymbolCreator. | ||
| * \param name The returned name of the creator. | ||
| * \param description The returned description of the symbol. | ||
| * \param num_doc_args Number of arguments that contain documents. | ||
| * \param arg_names Name of the arguments of doc args | ||
| * \param arg_type_infos Type informations about the arguments. | ||
| * \param arg_descriptions Description information about the arguments. | ||
| * \param return_type Return type of the function, if any. | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolGetAtomicSymbolInfo(AtomicSymbolCreator creator, | ||
| const char **name, | ||
| const char **description, | ||
| nn_uint *num_doc_args, | ||
| const char ***arg_names, | ||
| const char ***arg_type_infos, | ||
| const char ***arg_descriptions, | ||
| const char **return_type = NULL); | ||
| /*! | ||
| * \brief Create an AtomicSymbol functor. | ||
| * \param creator the AtomicSymbolCreator | ||
| * \param num_param the number of parameters | ||
| * \param keys the keys to the params | ||
| * \param vals the vals of the params | ||
| * \param out pointer to the created symbol handle | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolCreateAtomicSymbol(AtomicSymbolCreator creator, | ||
| nn_uint num_param, | ||
| const char **keys, | ||
| const char **vals, | ||
| SymbolHandle *out); | ||
| /*! | ||
| * \brief Create a Variable Symbol. | ||
| * \param name name of the variable | ||
| * \param out pointer to the created symbol handle | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolCreateVariable(const char *name, SymbolHandle *out); | ||
| /*! | ||
| * \brief Create a Symbol by grouping list of symbols together | ||
| * \param num_symbols number of symbols to be grouped | ||
| * \param symbols array of symbol handles | ||
| * \param out pointer to the created symbol handle | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolCreateGroup(nn_uint num_symbols, | ||
| SymbolHandle *symbols, | ||
| SymbolHandle *out); | ||
| /*! | ||
| * \brief Free the symbol handle. | ||
| * \param symbol the symbol | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolFree(SymbolHandle symbol); | ||
| /*! | ||
| * \brief Copy the symbol to another handle | ||
| * \param symbol the source symbol | ||
| * \param out used to hold the result of copy | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolCopy(SymbolHandle symbol, SymbolHandle *out); | ||
| /*! | ||
| * \brief Print the content of symbol, used for debug. | ||
| * \param symbol the symbol | ||
| * \param out_str pointer to hold the output string of the printing. | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolPrint(SymbolHandle symbol, const char **out_str); | ||
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| /*! | ||
| * \brief Set string attribute from symbol. | ||
| * NOTE: Setting attribute to a symbol can affect the semantics(mutable/immutable) of symbolic graph. | ||
| * | ||
| * Safe recommendaton: use immutable graph | ||
| * - Only allow set attributes during creation of new symbol as optional parameter | ||
| * | ||
| * Mutable graph (be careful about the semantics): | ||
| * - Allow set attr at any point. | ||
| * - Mutating an attribute of some common node of two graphs can cause confusion from user. | ||
| * | ||
| * \param symbol the source symbol | ||
| * \param num_param Number of parameters to set. | ||
| * \param keys The keys of the attribute | ||
| * \param values The value to be set | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolSetAttrs(SymbolHandle symbol, | ||
| nn_uint num_param, | ||
| const char** keys, | ||
| const char** values); | ||
| /*! | ||
| * \brief Get all attributes from symbol, including all descendents. | ||
| * \param symbol the source symbol | ||
| * \param recursive_option 0 for recursive, 1 for shallow. | ||
| * \param out_size The number of output attributes | ||
| * \param out 2*out_size strings representing key value pairs. | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolListAttrs(SymbolHandle symbol, | ||
| int recursive_option, | ||
| nn_uint *out_size, | ||
| const char*** out); | ||
| /*! | ||
| * \brief List arguments in the symbol. | ||
| * \param symbol the symbol | ||
| * \param out_size output size | ||
| * \param out_str_array pointer to hold the output string array | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolListArguments(SymbolHandle symbol, | ||
| nn_uint *out_size, | ||
| const char ***out_str_array); | ||
| /*! | ||
| * \brief List returns in the symbol. | ||
| * \param symbol the symbol | ||
| * \param out_size output size | ||
| * \param out_str_array pointer to hold the output string array | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolListOutputs(SymbolHandle symbol, | ||
| nn_uint *out_size, | ||
| const char ***out_str_array); | ||
| /*! | ||
| * \brief Get a symbol that contains all the internals. | ||
| * \param symbol The symbol | ||
| * \param out The output symbol whose outputs are all the internals. | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolGetInternals(SymbolHandle symbol, | ||
| SymbolHandle *out); | ||
| /*! | ||
| * \brief Get index-th outputs of the symbol. | ||
| * \param symbol The symbol | ||
| * \param index the Index of the output. | ||
| * \param out The output symbol whose outputs are the index-th symbol. | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolGetOutput(SymbolHandle symbol, | ||
| nn_uint index, | ||
| SymbolHandle *out); | ||
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| /*! | ||
| * \brief Compose the symbol on other symbols. | ||
| * | ||
| * This function will change the sym hanlde. | ||
| * To achieve function apply behavior, copy the symbol first | ||
| * before apply. | ||
| * | ||
| * \param sym the symbol to apply | ||
| * \param name the name of symbol | ||
| * \param num_args number of arguments | ||
| * \param keys the key of keyword args (optional) | ||
| * \param args arguments to sym | ||
| * \return 0 when success, -1 when failure happens | ||
| */ | ||
| NNVM_DLL int NNSymbolCompose(SymbolHandle sym, | ||
| const char* name, | ||
| nn_uint num_args, | ||
| const char** keys, | ||
| SymbolHandle* args); | ||
|
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| #endif // NNVM_C_API_H_ |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,59 @@ | ||
| /*! | ||
| * Copyright (c) 2016 by Contributors | ||
| * \file c_api_error.h | ||
| * \brief Common fields of all C APIs | ||
| */ | ||
| #ifndef NNVM_C_API_C_API_COMMON_H_ | ||
| #define NNVM_C_API_C_API_COMMON_H_ | ||
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| #include <dmlc/base.h> | ||
| #include <dmlc/logging.h> | ||
| #include <dmlc/thread_local.h> | ||
| #include <nnvm/c_api.h> | ||
| #include <vector> | ||
| #include <string> | ||
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| /*! \brief macro to guard beginning and end section of all functions */ | ||
| #define API_BEGIN() try { | ||
| /*! \brief every function starts with API_BEGIN(); | ||
| and finishes with API_END() or API_END_HANDLE_ERROR */ | ||
| #define API_END() } catch(dmlc::Error &_except_) { return NNAPIHandleException(_except_); } return 0; // NOLINT(*) | ||
| /*! | ||
| * \brief every function starts with API_BEGIN(); | ||
| * and finishes with API_END() or API_END_HANDLE_ERROR | ||
| * The finally clause contains procedure to cleanup states when an error happens. | ||
| */ | ||
| #define API_END_HANDLE_ERROR(Finalize) } catch(dmlc::Error &_except_) { Finalize; return NNAPIHandleException(_except_); } return 0; // NOLINT(*) | ||
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| /*! \brief entry to to easily hold returning information */ | ||
| struct NNAPIThreadLocalEntry { | ||
| /*! \brief result holder for returning string */ | ||
| std::string ret_str; | ||
| /*! \brief result holder for returning strings */ | ||
| std::vector<std::string> ret_vec_str; | ||
| /*! \brief result holder for returning string pointers */ | ||
| std::vector<const char *> ret_vec_charp; | ||
| /*! \brief result holder for returning handles */ | ||
| std::vector<void *> ret_handles; | ||
| }; | ||
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| /*! \brief Thread local store that can be used to hold return values. */ | ||
| typedef dmlc::ThreadLocalStore<NNAPIThreadLocalEntry> NNAPIThreadLocalStore; | ||
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| /*! | ||
| * \brief Set the last error message needed by C API | ||
| * \param msg The error message to set. | ||
| */ | ||
| void NNAPISetLastError(const char* msg); | ||
| /*! | ||
| * \brief handle exception throwed out | ||
| * \param e the exception | ||
| * \return the return value of API after exception is handled | ||
| */ | ||
| inline int NNAPIHandleException(const dmlc::Error &e) { | ||
| NNAPISetLastError(e.what()); | ||
| return -1; | ||
| } | ||
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| #endif // NNVM_C_API_C_API_COMMON_H_ |
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