diff options
Diffstat (limited to 'mdk-stage1/slang/slimport.c')
| -rw-r--r-- | mdk-stage1/slang/slimport.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/mdk-stage1/slang/slimport.c b/mdk-stage1/slang/slimport.c deleted file mode 100644 index 44b4b25e1..000000000 --- a/mdk-stage1/slang/slimport.c +++ /dev/null @@ -1,281 +0,0 @@ -/* Copyright (c) 1998, 1999, 2001 John E. Davis - * This file is part of the S-Lang library. - * - * You may distribute under the terms of either the GNU General Public - * License or the Perl Artistic License. - */ - -#include "slinclud.h" - -#include "slang.h" -#include "_slang.h" - -#define SLANG_HAS_DYNAMIC_LINKING 1 - -#ifndef HAVE_DLFCN_H -# undef SLANG_HAS_DYNAMIC_LINKING -# define SLANG_HAS_DYNAMIC_LINKING 0 -#endif - -/* The rest of this file is in the if block */ -#if SLANG_HAS_DYNAMIC_LINKING - -#ifdef HAVE_DLFCN_H -# include <dlfcn.h> -#endif - -static char *Module_Path; -#define MODULE_PATH_ENV_NAME "SLANG_MODULE_PATH" -#ifndef MODULE_INSTALL_DIR -# define MODULE_INSTALL_DIR "/usr/local/lib/slang/modules" -#endif - -typedef struct _Handle_Type -{ - struct _Handle_Type *next; - char *name; - VOID_STAR handle; - void (*deinit_fun) (void); -} -Handle_Type; - -static Handle_Type *Handle_List; - -static void delete_handles (void) -{ - while (Handle_List != NULL) - { - Handle_Type *next = Handle_List->next; - - if (Handle_List->deinit_fun != NULL) - Handle_List->deinit_fun (); - (void) dlclose (Handle_List->handle); - SLang_free_slstring (Handle_List->name); - SLfree ((char *)Handle_List); - Handle_List = next; - } -} - -static Handle_Type *save_handle (char *name, VOID_STAR h, void (*df)(void)) -{ - Handle_Type *l; - - l = (Handle_Type *) SLmalloc (sizeof (Handle_Type)); - if (l == NULL) - return NULL; - memset ((char *) l, 0, sizeof(Handle_Type)); - if (NULL == (l->name = SLang_create_slstring (name))) - { - SLfree ((char *) l); - return NULL; - } - l->handle = h; - l->next = Handle_List; - l->deinit_fun = df; - Handle_List = l; - - return l; -} - -static Handle_Type *find_handle (char *name) -{ - Handle_Type *l; - - l = Handle_List; - while (l != NULL) - { - if (0 == strcmp (l->name, name)) - break; - l = l->next; - } - return l; -} - -static int import_from_library (char *name, - char *init_fun_name, char *deinit_fun_name, - char *file, - char *ns, - char *ns_init_fun_name) -{ - VOID_STAR handle; - int (*init_fun) (void); - int (*ns_init_fun) (char *); - void (*deinit_fun) (void); - char *err; - char filebuf[1024]; - char *fun_name; - - if (NULL != find_handle (name)) - return 0; /* already loaded */ - - while (1) - { -#ifndef RTLD_GLOBAL -# define RTLD_GLOBAL 0 -#endif -#ifdef RTLD_NOW - handle = (VOID_STAR) dlopen (file, RTLD_NOW | RTLD_GLOBAL); -#else - handle = (VOID_STAR) dlopen (file, RTLD_LAZY | RTLD_GLOBAL); -#endif - - if (handle != NULL) - break; - - if (NULL == strchr (file, '/')) - { - _SLsnprintf (filebuf, sizeof (filebuf), "./%s", file); - file = filebuf; - continue; - } - - if (NULL == (err = (char *) dlerror ())) - err = "UNKNOWN"; - - SLang_verror (SL_INTRINSIC_ERROR, - "Error linking to %s: %s", file, err); - return -1; - } - - fun_name = ns_init_fun_name; - ns_init_fun = (int (*)(char *)) dlsym (handle, fun_name); - if (ns_init_fun == NULL) - { - if ((ns != NULL) - && (0 != strcmp (ns, "Global"))) - goto return_error; - - fun_name = init_fun_name; - init_fun = (int (*)(void)) dlsym (handle, fun_name); - if (init_fun == NULL) - goto return_error; - - if (-1 == (*init_fun) ()) - { - dlclose (handle); - return -1; - } - } - else if (-1 == (*ns_init_fun) (ns)) - { - dlclose (handle); - return -1; - } - - - deinit_fun = (void (*)(void)) dlsym (handle, deinit_fun_name); - - (void) save_handle (name, handle, deinit_fun); - return 0; - - return_error: - - if (NULL == (err = (char *) dlerror ())) - err = "UNKNOWN"; - - dlclose (handle); - SLang_verror (SL_INTRINSIC_ERROR, - "Unable to get symbol %s from %s: %s", - name, file, err); - return -1; -} - -static void import_module (void) -{ - char module_name[256]; - char symbol_name[256]; - char deinit_name[256]; - char ns_init_name[256]; - char *path; - char *file; - char *module; - char *ns = NULL; - - if (SLang_Num_Function_Args == 2) - { - if (-1 == SLang_pop_slstring (&ns)) - return; - } - - if (-1 == SLang_pop_slstring (&module)) - { - SLang_free_slstring (ns); /* NULL ok */ - return; - } - - _SLsnprintf (symbol_name, sizeof(symbol_name), "init_%s_module", module); - _SLsnprintf (module_name, sizeof(module_name), "%s-module.so", module); - _SLsnprintf (deinit_name, sizeof(deinit_name), "deinit_%s_module", module); - _SLsnprintf (ns_init_name, sizeof (ns_init_name), "init_%s_module_ns", module); - - if (Module_Path != NULL) - file = SLpath_find_file_in_path (Module_Path, module_name); - else file = NULL; - - if ((file == NULL) - && (NULL != (path = getenv (MODULE_PATH_ENV_NAME)))) - file = SLpath_find_file_in_path (path, module_name); - - if (file == NULL) - file = SLpath_find_file_in_path (MODULE_INSTALL_DIR, module_name); - - if (file != NULL) - { - (void) import_from_library (symbol_name, symbol_name, deinit_name, file, ns, ns_init_name); - SLfree (file); - } - else - { - /* Maybe the system loader can find it in LD_LIBRARY_PATH */ - (void) import_from_library (symbol_name, symbol_name, deinit_name, module_name, ns, ns_init_name); - } -} - -static void set_import_module_path (char *path) -{ - (void) SLang_set_module_load_path (path); -} - -static char *get_import_module_path (void) -{ - char *path; - if (Module_Path != NULL) - return Module_Path; - if (NULL != (path = getenv (MODULE_PATH_ENV_NAME))) - return path; - return MODULE_INSTALL_DIR; -} - -static SLang_Intrin_Fun_Type Module_Intrins [] = -{ - MAKE_INTRINSIC_0("import", import_module, SLANG_VOID_TYPE), - MAKE_INTRINSIC_S("set_import_module_path", set_import_module_path, SLANG_VOID_TYPE), - MAKE_INTRINSIC_0("get_import_module_path", get_import_module_path, SLANG_STRING_TYPE), - SLANG_END_INTRIN_FUN_TABLE -}; - -#endif /* SLANG_HAS_DYNAMIC_LINKING */ - -int SLang_set_module_load_path (char *path) -{ -#if SLANG_HAS_DYNAMIC_LINKING - if (NULL == (path = SLang_create_slstring (path))) - return -1; - SLang_free_slstring (Module_Path); - Module_Path = path; - return 0; -#else - (void) path; - return -1; -#endif -} - -int SLang_init_import (void) -{ -#if SLANG_HAS_DYNAMIC_LINKING - (void) SLang_add_cleanup_function (delete_handles); - return SLadd_intrin_fun_table (Module_Intrins, "__IMPORT__"); -#else - return 0; -#endif -} |