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libjulia.cpp
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libjulia.cpp
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#define LIBJULIA_CPP
#include "libjulia.h"
#ifndef _WIN32
#include <dlfcn.h>
#else
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#endif
#include <string>
namespace libjulia {
std::string last_loaded_symbol;
std::string get_last_loaded_symbol() {
return last_loaded_symbol;
}
std::string get_last_dl_error_message() {
std::string Error;
#ifdef _WIN32
LPVOID lpMsgBuf;
DWORD dw = ::GetLastError();
DWORD length = ::FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
if (length != 0) {
std::string msg((LPTSTR)lpMsgBuf);
LocalFree(lpMsgBuf);
Error.assign(msg);
} else {
Error.assign("(Unknown error)");
}
#else
const char* msg = ::dlerror();
if (msg != NULL)
Error.assign(msg);
else
Error.assign("(Unknown error)");
#endif
return Error;
}
bool load_symbol(void* plib, const std::string& name, void** ppSymbol) {
last_loaded_symbol = name;
*ppSymbol = NULL;
#ifdef _WIN32
*ppSymbol = (void*)::GetProcAddress((HINSTANCE)plib, name.c_str());
#else
*ppSymbol = ::dlsym(plib, name.c_str());
#endif
if (*ppSymbol == NULL) {
return false;
} else {
return true;
}
}
bool load_libjulia(const std::string& libpath) {
libjulia_t = NULL;
#ifdef _WIN32
libjulia_t = (void*)::LoadLibraryEx(libpath.c_str(), NULL, 0);
#else
libjulia_t = ::dlopen(libpath.c_str(), RTLD_NOW|RTLD_GLOBAL);
#endif
if (libjulia_t == NULL) {
return false;
} else {
return true;
}
}
bool unload_libjulia() {
if (libjulia_t != NULL) {
#ifdef _WIN32
if (!::FreeLibrary((HMODULE)libjulia_t)) {
#else
if (::dlclose(libjulia_t) != 0) {
#endif
return false;
} else {
return true;
}
}
else
return true;
}
#define LOAD_JULIA_SYMBOL_AS(name, as) \
if (!load_symbol(libjulia_t, #name, (void**) &as)) \
return false;
#define LOAD_JULIA_SYMBOL(name) \
if (!load_symbol(libjulia_t, #name, (void**) &name)) \
return false;
bool load_libjulia_symbols() {
LOAD_JULIA_SYMBOL(jl_typeof_str);
LOAD_JULIA_SYMBOL(jl_symbol);
LOAD_JULIA_SYMBOL(jl_box_voidpointer);
LOAD_JULIA_SYMBOL(jl_unbox_voidpointer);
LOAD_JULIA_SYMBOL(jl_get_global);
LOAD_JULIA_SYMBOL(jl_is_initialized);
LOAD_JULIA_SYMBOL(jl_init);
LOAD_JULIA_SYMBOL(jl_atexit_hook);
LOAD_JULIA_SYMBOL(jl_eval_string);
LOAD_JULIA_SYMBOL(jl_exception_occurred);
LOAD_JULIA_SYMBOL(jl_call);
LOAD_JULIA_SYMBOL(jl_call0);
LOAD_JULIA_SYMBOL(jl_call1);
LOAD_JULIA_SYMBOL(jl_call2);
LOAD_JULIA_SYMBOL(jl_call3);
LOAD_JULIA_SYMBOL(jl_stderr_stream);
LOAD_JULIA_SYMBOL(jl_printf);
LOAD_JULIA_SYMBOL(jl_flush_cstdio);
LOAD_JULIA_SYMBOL(jl_stdout_obj);
LOAD_JULIA_SYMBOL(jl_stderr_obj);
return true;
}
bool load_libjulia_modules() {
// not sure why LOAD_JULIA_SYMBOL fails
jl_main_module = (jl_module_t*) jl_eval_string("Main");
jl_core_module = (jl_module_t*) jl_eval_string("Core");
jl_base_module = (jl_module_t*) jl_eval_string("Base");
return true;
}
} // namespace libjulia