* Copyright (C) 1998 Tim Janik
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
-#include "gmodule.h"
-#include "gmoduleconf.h"
-#include <errno.h>
-#include <string.h>
+/*
+ * Modified by the GLib Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GLib Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+/*
+ * MT safe
+ */
+
+#include "config.h"
+
+#include "glib.h"
+
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef G_OS_WIN32
+#include <io.h> /* For open() and close() prototypes. */
+#endif
+
+#include "gmoduleconf.h"
+#include "gstdio.h"
+#include "gmodule.h"
/* We maintain a list of modules, so we can reference count them.
* That's needed because some platforms don't support refernce counts on
- * modules (http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html).
+ * modules e.g. the shl_* implementation of HP-UX
+ * (http://www.stat.umn.edu/~luke/xls/projects/dlbasics/dlbasics.html).
* Also, the module for the program itself is kept seperatedly for
- * faster access.
+ * faster access and because it has special semantics.
*/
struct _GModule
{
gchar *file_name;
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+ gchar *cp_file_name;
+#endif
gpointer handle;
- guint ref_count;
- GModuleDeInit de_init;
+ guint ref_count : 31;
+ guint is_resident : 1;
+ GModuleUnload unload;
GModule *next;
};
/* --- prototypes --- */
static gpointer _g_module_open (const gchar *file_name,
- gboolean bind_lazy);
-static void _g_module_close (gpointer *handle_p,
+ gboolean bind_lazy,
+ gboolean bind_local);
+static void _g_module_close (gpointer handle,
gboolean is_unref);
static gpointer _g_module_self (void);
-static gpointer _g_module_symbol (gpointer *handle_p,
+static gpointer _g_module_symbol (gpointer handle,
const gchar *symbol_name);
+static gchar* _g_module_build_path (const gchar *directory,
+ const gchar *module_name);
static inline void g_module_set_error (const gchar *error);
static inline GModule* g_module_find_by_handle (gpointer handle);
static inline GModule* g_module_find_by_name (const gchar *name);
/* --- variables --- */
-static GModule *modules = NULL;
-static GModule *main_module = NULL;
-static gchar *module_error = NULL;
+static GModule *modules = NULL;
+static GModule *main_module = NULL;
+static GStaticPrivate module_error_private = G_STATIC_PRIVATE_INIT;
+static gboolean module_debug_initialized = FALSE;
+static guint module_debug_flags = 0;
/* --- inline functions --- */
g_module_find_by_handle (gpointer handle)
{
GModule *module;
+ GModule *retval = NULL;
+
+ if (main_module && main_module->handle == handle)
+ retval = main_module;
+ else
+ for (module = modules; module; module = module->next)
+ if (handle == module->handle)
+ {
+ retval = module;
+ break;
+ }
- for (module = modules; module; module = module->next)
- if (handle == module->handle)
- return module;
- return NULL;
+ return retval;
}
static inline GModule*
g_module_find_by_name (const gchar *name)
{
GModule *module;
-
+ GModule *retval = NULL;
+
for (module = modules; module; module = module->next)
if (strcmp (name, module->file_name) == 0)
- return module;
- return NULL;
+ {
+ retval = module;
+ break;
+ }
+
+ return retval;
}
static inline void
-g_module_set_error (const gchar *error)
+g_module_set_error_unduped (gchar *error)
{
- if (module_error)
- g_free (module_error);
- if (error)
- module_error = g_strdup (error);
- else
- module_error = NULL;
+ g_static_private_set (&module_error_private, error, g_free);
errno = 0;
}
+static inline void
+g_module_set_error (const gchar *error)
+{
+ g_module_set_error_unduped (g_strdup (error));
+}
+
/* --- include platform specifc code --- */
-#define CHECK_ERROR(rv) { g_module_set_error (NULL); }
+#define SUPPORT_OR_RETURN(rv) { g_module_set_error (NULL); }
#if (G_MODULE_IMPL == G_MODULE_IMPL_DL)
#include "gmodule-dl.c"
#elif (G_MODULE_IMPL == G_MODULE_IMPL_DLD)
#include "gmodule-dld.c"
+#elif (G_MODULE_IMPL == G_MODULE_IMPL_WIN32)
+#include "gmodule-win32.c"
+#elif (G_MODULE_IMPL == G_MODULE_IMPL_DYLD)
+#include "gmodule-dyld.c"
+#elif (G_MODULE_IMPL == G_MODULE_IMPL_AR)
+#include "gmodule-ar.c"
#else
-#undef CHECK_ERROR
-#define CHECK_ERROR(rv) { g_module_set_error ("unsupported"); return rv; }
+#undef SUPPORT_OR_RETURN
+#define SUPPORT_OR_RETURN(rv) { g_module_set_error ("dynamic modules are " \
+ "not supported by this system"); return rv; }
+static gpointer
+_g_module_open (const gchar *file_name,
+ gboolean bind_lazy,
+ gboolean bind_local)
+{
+ return NULL;
+}
+static void
+_g_module_close (gpointer handle,
+ gboolean is_unref)
+{
+}
+static gpointer
+_g_module_self (void)
+{
+ return NULL;
+}
+static gpointer
+_g_module_symbol (gpointer handle,
+ const gchar *symbol_name)
+{
+ return NULL;
+}
+static gchar*
+_g_module_build_path (const gchar *directory,
+ const gchar *module_name)
+{
+ return NULL;
+}
#endif /* no implementation */
-
/* --- functions --- */
gboolean
g_module_supported (void)
{
- CHECK_ERROR (FALSE);
-
+ SUPPORT_OR_RETURN (FALSE);
+
return TRUE;
}
+static gchar*
+parse_libtool_archive (const gchar* libtool_name)
+{
+ const guint TOKEN_DLNAME = G_TOKEN_LAST + 1;
+ const guint TOKEN_INSTALLED = G_TOKEN_LAST + 2;
+ const guint TOKEN_LIBDIR = G_TOKEN_LAST + 3;
+ gchar *lt_dlname = NULL;
+ gboolean lt_installed = TRUE;
+ gchar *lt_libdir = NULL;
+ gchar *name;
+ GTokenType token;
+ GScanner *scanner;
+
+ int fd = g_open (libtool_name, O_RDONLY, 0);
+ if (fd < 0)
+ {
+ gchar *display_libtool_name = g_filename_display_name (libtool_name);
+ g_module_set_error_unduped (g_strdup_printf ("failed to open libtool archive \"%s\"", display_libtool_name));
+ g_free (display_libtool_name);
+ return NULL;
+ }
+ /* search libtool's dlname specification */
+ scanner = g_scanner_new (NULL);
+ g_scanner_input_file (scanner, fd);
+ scanner->config->symbol_2_token = TRUE;
+ g_scanner_scope_add_symbol (scanner, 0, "dlname",
+ GUINT_TO_POINTER (TOKEN_DLNAME));
+ g_scanner_scope_add_symbol (scanner, 0, "installed",
+ GUINT_TO_POINTER (TOKEN_INSTALLED));
+ g_scanner_scope_add_symbol (scanner, 0, "libdir",
+ GUINT_TO_POINTER (TOKEN_LIBDIR));
+ while (!g_scanner_eof (scanner))
+ {
+ token = g_scanner_get_next_token (scanner);
+ if (token == TOKEN_DLNAME || token == TOKEN_INSTALLED ||
+ token == TOKEN_LIBDIR)
+ {
+ if (g_scanner_get_next_token (scanner) != '=' ||
+ g_scanner_get_next_token (scanner) !=
+ (token == TOKEN_INSTALLED ?
+ G_TOKEN_IDENTIFIER : G_TOKEN_STRING))
+ {
+ gchar *display_libtool_name = g_filename_display_name (libtool_name);
+ g_module_set_error_unduped (g_strdup_printf ("unable to parse libtool archive \"%s\"", display_libtool_name));
+ g_free (display_libtool_name);
+
+ g_free (lt_dlname);
+ g_free (lt_libdir);
+ g_scanner_destroy (scanner);
+ close (fd);
+
+ return NULL;
+ }
+ else
+ {
+ if (token == TOKEN_DLNAME)
+ {
+ g_free (lt_dlname);
+ lt_dlname = g_strdup (scanner->value.v_string);
+ }
+ else if (token == TOKEN_INSTALLED)
+ lt_installed =
+ strcmp (scanner->value.v_identifier, "yes") == 0;
+ else /* token == TOKEN_LIBDIR */
+ {
+ g_free (lt_libdir);
+ lt_libdir = g_strdup (scanner->value.v_string);
+ }
+ }
+ }
+ }
+
+ if (!lt_installed)
+ {
+ gchar *dir = g_path_get_dirname (libtool_name);
+ g_free (lt_libdir);
+ lt_libdir = g_strconcat (dir, G_DIR_SEPARATOR_S ".libs", NULL);
+ g_free (dir);
+ }
+
+ name = g_strconcat (lt_libdir, G_DIR_SEPARATOR_S, lt_dlname, NULL);
+
+ g_free (lt_dlname);
+ g_free (lt_libdir);
+ g_scanner_destroy (scanner);
+ close (fd);
+
+ return name;
+}
+
+static inline gboolean
+str_check_suffix (const gchar* string,
+ const gchar* suffix)
+{
+ gsize string_len = strlen (string);
+ gsize suffix_len = strlen (suffix);
+
+ return string_len >= suffix_len &&
+ strcmp (string + string_len - suffix_len, suffix) == 0;
+}
+
+enum
+{
+ G_MODULE_DEBUG_RESIDENT_MODULES = 1 << 0,
+ G_MODULE_DEBUG_BIND_NOW_MODULES = 1 << 1
+};
+
+static void
+_g_module_debug_init (void)
+{
+ const GDebugKey keys[] = {
+ { "resident-modules", G_MODULE_DEBUG_RESIDENT_MODULES },
+ { "bind-now-modules", G_MODULE_DEBUG_BIND_NOW_MODULES }
+ };
+ const gchar *env;
+
+ env = g_getenv ("G_DEBUG");
+
+ module_debug_flags =
+ !env ? 0 : g_parse_debug_string (env, keys, G_N_ELEMENTS (keys));
+
+ module_debug_initialized = TRUE;
+}
+
+static GStaticRecMutex g_module_global_lock = G_STATIC_REC_MUTEX_INIT;
+
GModule*
g_module_open (const gchar *file_name,
GModuleFlags flags)
{
GModule *module;
- gpointer handle;
+ gpointer handle = NULL;
+ gchar *name = NULL;
+
+ SUPPORT_OR_RETURN (NULL);
+
+ g_static_rec_mutex_lock (&g_module_global_lock);
+
+ if (G_UNLIKELY (!module_debug_initialized))
+ _g_module_debug_init ();
- CHECK_ERROR (NULL);
+ if (module_debug_flags & G_MODULE_DEBUG_BIND_NOW_MODULES)
+ flags &= ~G_MODULE_BIND_LAZY;
if (!file_name)
- {
+ {
if (!main_module)
{
handle = _g_module_self ();
{
main_module = g_new (GModule, 1);
main_module->file_name = NULL;
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+ main_module->cp_file_name = NULL;
+#endif
main_module->handle = handle;
main_module->ref_count = 1;
- main_module->de_init = NULL;
+ main_module->is_resident = TRUE;
+ main_module->unload = NULL;
main_module->next = NULL;
}
}
+ else
+ main_module->ref_count++;
+ g_static_rec_mutex_unlock (&g_module_global_lock);
return main_module;
}
-
+
/* we first search the module list by name */
module = g_module_find_by_name (file_name);
if (module)
{
module->ref_count++;
-
+
+ g_static_rec_mutex_unlock (&g_module_global_lock);
return module;
}
- /* open the module */
- handle = _g_module_open (file_name, (flags & G_MODULE_BIND_LAZY) != 0);
+ /* check whether we have a readable file right away */
+ if (g_file_test (file_name, G_FILE_TEST_IS_REGULAR))
+ name = g_strdup (file_name);
+ /* try completing file name with standard library suffix */
+ if (!name)
+ {
+ name = g_strconcat (file_name, "." G_MODULE_SUFFIX, NULL);
+ if (!g_file_test (name, G_FILE_TEST_IS_REGULAR))
+ {
+ g_free (name);
+ name = NULL;
+ }
+ }
+ /* try completing by appending libtool suffix */
+ if (!name)
+ {
+ name = g_strconcat (file_name, ".la", NULL);
+ if (!g_file_test (name, G_FILE_TEST_IS_REGULAR))
+ {
+ g_free (name);
+ name = NULL;
+ }
+ }
+ /* we can't access() the file, lets hope the platform backends finds
+ * it via library paths
+ */
+ if (!name)
+ {
+ gchar *dot = strrchr (file_name, '.');
+ gchar *slash = strrchr (file_name, G_DIR_SEPARATOR);
+
+ /* make sure the name has a suffix */
+ if (!dot || dot < slash)
+ name = g_strconcat (file_name, "." G_MODULE_SUFFIX, NULL);
+ else
+ name = g_strdup (file_name);
+ }
+
+ /* ok, try loading the module */
+ if (name)
+ {
+ /* if it's a libtool archive, figure library file to load */
+ if (str_check_suffix (name, ".la")) /* libtool archive? */
+ {
+ gchar *real_name = parse_libtool_archive (name);
+
+ /* real_name might be NULL, but then module error is already set */
+ if (real_name)
+ {
+ g_free (name);
+ name = real_name;
+ }
+ }
+ if (name)
+ handle = _g_module_open (name, (flags & G_MODULE_BIND_LAZY) != 0,
+ (flags & G_MODULE_BIND_LOCAL) != 0);
+ }
+ else
+ {
+ gchar *display_file_name = g_filename_display_name (file_name);
+ g_module_set_error_unduped (g_strdup_printf ("unable to access file \"%s\"", display_file_name));
+ g_free (display_file_name);
+ }
+ g_free (name);
+
if (handle)
{
gchar *saved_error;
GModuleCheckInit check_init;
- gboolean check_failed = FALSE;
-
+ const gchar *check_failed = NULL;
+
/* search the module list by handle, since file names are not unique */
module = g_module_find_by_handle (handle);
if (module)
{
- _g_module_close (&module->handle, TRUE);
+ _g_module_close (module->handle, TRUE);
module->ref_count++;
g_module_set_error (NULL);
-
+
+ g_static_rec_mutex_unlock (&g_module_global_lock);
return module;
}
-
- saved_error = module_error;
- module_error = NULL;
+
+ saved_error = g_strdup (g_module_error ());
g_module_set_error (NULL);
-
+
module = g_new (GModule, 1);
module->file_name = g_strdup (file_name);
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+ module->cp_file_name = g_locale_from_utf8 (file_name, -1,
+ NULL, NULL, NULL);
+#endif
module->handle = handle;
- module->ref_count = 0;
- module->de_init = NULL;
- module->next = NULL;
-
+ module->ref_count = 1;
+ module->is_resident = FALSE;
+ module->unload = NULL;
+ module->next = modules;
+ modules = module;
+
/* check initialization */
- if (g_module_symbol (module, "g_module_check_init", &check_init))
+ if (g_module_symbol (module, "g_module_check_init", (gpointer) &check_init) && check_init != NULL)
check_failed = check_init (module);
-
- /* should call de_init() on failed initializations also? */
+
+ /* we don't call unload() if the initialization check failed. */
if (!check_failed)
- g_module_symbol (module, "g_module_de_init", &module->de_init);
-
- module->ref_count += 1;
- module->next = modules;
- modules = module;
-
+ g_module_symbol (module, "g_module_unload", (gpointer) &module->unload);
+
if (check_failed)
{
+ gchar *error;
+
+ error = g_strconcat ("GModule (",
+ file_name ? file_name : "NULL",
+ ") initialization check failed: ",
+ check_failed, NULL);
g_module_close (module);
module = NULL;
- g_module_set_error ("GModule initialization check failed");
+ g_module_set_error (error);
+ g_free (error);
}
else
g_module_set_error (saved_error);
+
g_free (saved_error);
}
+ if (module != NULL &&
+ (module_debug_flags & G_MODULE_DEBUG_RESIDENT_MODULES))
+ g_module_make_resident (module);
+
+ g_static_rec_mutex_unlock (&g_module_global_lock);
return module;
}
-gboolean
-g_module_close (GModule *module)
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+
+#undef g_module_open
+
+GModule*
+g_module_open (const gchar *file_name,
+ GModuleFlags flags)
{
- CHECK_ERROR (FALSE);
+ gchar *utf8_file_name = g_locale_to_utf8 (file_name, -1, NULL, NULL, NULL);
+ GModule *retval = g_module_open_utf8 (utf8_file_name, flags);
+
+ g_free (utf8_file_name);
+
+ return retval;
+}
+
+#endif
+gboolean
+g_module_close (GModule *module)
+{
+ SUPPORT_OR_RETURN (FALSE);
+
g_return_val_if_fail (module != NULL, FALSE);
g_return_val_if_fail (module->ref_count > 0, FALSE);
+
+ g_static_rec_mutex_lock (&g_module_global_lock);
- if (module != main_module)
- module->ref_count--;
+ module->ref_count--;
+
+ if (!module->ref_count && !module->is_resident && module->unload)
+ {
+ GModuleUnload unload;
+
+ unload = module->unload;
+ module->unload = NULL;
+ unload (module);
+ }
- if (!module->ref_count)
+ if (!module->ref_count && !module->is_resident)
{
GModule *last;
GModule *node;
-
+
last = NULL;
+
node = modules;
while (node)
{
node = last->next;
}
module->next = NULL;
-
- if (module->de_init)
- module->de_init (module);
-
- _g_module_close (&module->handle, FALSE);
+
+ _g_module_close (module->handle, FALSE);
g_free (module->file_name);
-
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+ g_free (module->cp_file_name);
+#endif
g_free (module);
}
+
+ g_static_rec_mutex_unlock (&g_module_global_lock);
+ return g_module_error() == NULL;
+}
- return module_error == NULL;
+void
+g_module_make_resident (GModule *module)
+{
+ g_return_if_fail (module != NULL);
+
+ module->is_resident = TRUE;
}
-gchar*
+G_CONST_RETURN gchar*
g_module_error (void)
{
- return module_error;
+ return g_static_private_get (&module_error_private);
}
gboolean
-g_module_symbol (GModule *module,
- const gchar *symbol_name,
- gconstpointer *symbol)
+g_module_symbol (GModule *module,
+ const gchar *symbol_name,
+ gpointer *symbol)
{
+ const gchar *module_error;
+
if (symbol)
*symbol = NULL;
- CHECK_ERROR (FALSE);
-
+ SUPPORT_OR_RETURN (FALSE);
+
g_return_val_if_fail (module != NULL, FALSE);
g_return_val_if_fail (symbol_name != NULL, FALSE);
g_return_val_if_fail (symbol != NULL, FALSE);
+
+ g_static_rec_mutex_lock (&g_module_global_lock);
#ifdef G_MODULE_NEED_USCORE
- symbol_name = g_strconcat ("_", symbol_name, NULL);
- *symbol = _g_module_symbol (&module->handle, symbol_name);
- g_free (symbol_name);
+ {
+ gchar *name;
+
+ name = g_strconcat ("_", symbol_name, NULL);
+ *symbol = _g_module_symbol (module->handle, name);
+ g_free (name);
+ }
#else /* !G_MODULE_NEED_USCORE */
- *symbol = _g_module_symbol (&module->handle, symbol_name);
+ *symbol = _g_module_symbol (module->handle, symbol_name);
#endif /* !G_MODULE_NEED_USCORE */
-
+
+ module_error = g_module_error ();
if (module_error)
{
+ gchar *error;
+
+ error = g_strconcat ("`", symbol_name, "': ", module_error, NULL);
+ g_module_set_error (error);
+ g_free (error);
*symbol = NULL;
- return FALSE;
}
-
- return TRUE;
+
+ g_static_rec_mutex_unlock (&g_module_global_lock);
+ return !module_error;
}
-gchar*
+G_CONST_RETURN gchar*
g_module_name (GModule *module)
{
g_return_val_if_fail (module != NULL, NULL);
+
+ if (module == main_module)
+ return "main";
+
+ return module->file_name;
+}
+#if defined (G_OS_WIN32) && !defined(_WIN64)
+
+#undef g_module_name
+
+G_CONST_RETURN gchar*
+g_module_name (GModule *module)
+{
+ g_return_val_if_fail (module != NULL, NULL);
+
if (module == main_module)
return "main";
+
+ return module->cp_file_name;
+}
- return module->file_name;
+#endif
+
+gchar*
+g_module_build_path (const gchar *directory,
+ const gchar *module_name)
+{
+ g_return_val_if_fail (module_name != NULL, NULL);
+
+ return _g_module_build_path (directory, module_name);
}
projects / platform / upstream / glib.git / blobdiff