#pragma once

#include <string>

#if defined(_WIN32)

// Windows

#include <windows.h>

namespace pythonx::dl {

using LibraryHandle = HMODULE;

inline LibraryHandle open_library(const char *name) {

return LoadLibrary(name);

}

inline void *get_symbol(LibraryHandle lib, const char *name) {

return reinterpret_cast<void *>(GetProcAddress(lib, name));

}

inline bool close_library(LibraryHandle lib) { return FreeLibrary(lib); }

inline std::string error() {

auto code = GetLastError();

if (code == 0) {

return nullptr;

}

return "code " + std::to_string(code);

}

} // namespace pythonx::dl

#else

// Unix

#include <dlfcn.h>

namespace pythonx::dl {

using LibraryHandle = void *;

inline LibraryHandle open_library(const char *name) {

// Note that we want RTLD_GLOBAL, so that Python library symbols

// are visible to Python C extensions.

return dlopen(name, RTLD_GLOBAL | RTLD_LAZY);

}

inline void *get_symbol(LibraryHandle lib, const char *name) {

return dlsym(lib, name);

}

inline bool close_library(LibraryHandle lib) { return dlclose(lib) == 0; }

inline std::string error() { return dlerror(); }

} // namespace pythonx::dl

#endif