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Add function to get libjulia path at runtime #5045

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Add function to get libjulia path at runtime #5045

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29bb97f
add jl_get_libjulia_path
tknopp Dec 6, 2013
bd04a26
Update dlload.c
tknopp Dec 8, 2014
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33 changes: 33 additions & 0 deletions src/dlload.c
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Original file line number Diff line number Diff line change
Expand Up @@ -209,6 +209,39 @@ char *jl_dlfind_win32(char *f_name)
}
#endif

static char *libjulia_path = NULL;
DLLEXPORT char *jl_get_libjulia_path()
{
if (libjulia_path != NULL) {
int max_path = 512;
libjulia_path = malloc(max_path);

#ifdef _OS_WINDOWS_
HMODULE hm = NULL;

if (!GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
(LPCSTR) &jl_get_libjulia_path,
&hm)) {
int ret = GetLastError();
fprintf(stderr, "GetModuleHandle returned %d\n", ret);
}
GetModuleFileNameA(hm, libjulia_path, max_path);
#else
Dl_info dl_info;
dladdr((void*)jl_get_libjulia_path, &dl_info);
strncpy(libjulia_path, dl_info.dli_fname, max_path);
#endif

// remove libjulia.so/dll/dylib from full path
char *pos = strrchr(libjulia_path, PATHSEP);
if (pos) { // terminate string
pos[1] = '\0';
}
}
return libjulia_path;
}

#ifdef __cplusplus
}
#endif
1 change: 1 addition & 0 deletions src/julia.h
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Expand Up @@ -906,6 +906,7 @@ DLLEXPORT int jl_uv_dlopen(const char *filename, uv_lib_t *lib, unsigned flags);
DLLEXPORT uv_lib_t *jl_wrap_raw_dl_handle(void *handle);
char *jl_dlfind_win32(char *name);
DLLEXPORT int add_library_mapping(char *lib, void *hnd);
DLLEXPORT char *jl_get_libjulia_path();

#if defined(__linux__) || defined(__FreeBSD__)
DLLEXPORT const char *jl_lookup_soname(char *pfx, size_t n);
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