*
* 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
+
+/*
+ * MT safe
+ */
+
#include "gmodule.h"
#include "gmoduleconf.h"
#include <errno.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.
*/
{
gchar *file_name;
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,
+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;
+G_LOCK_DECLARE_STATIC (GModule);
+const char *g_log_domain_gmodule = "GModule";
+static GModule *modules = NULL;
+static GModule *main_module = NULL;
+static GStaticPrivate module_error_private = G_STATIC_PRIVATE_INIT;
/* --- inline functions --- */
g_module_find_by_handle (gpointer handle)
{
GModule *module;
-
+ GModule *retval = NULL;
+
+ G_LOCK (GModule);
if (main_module && main_module->handle == handle)
- return main_module;
+ retval = main_module;
+ else
+ for (module = modules; module; module = module->next)
+ if (handle == module->handle)
+ {
+ retval = module;
+ break;
+ }
+ G_UNLOCK (GModule);
- 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;
+
+ G_LOCK (GModule);
for (module = modules; module; module = module->next)
if (strcmp (name, module->file_name) == 0)
- return module;
- return NULL;
+ {
+ retval = module;
+ break;
+ }
+ G_UNLOCK (GModule);
+
+ return retval;
}
static inline void
g_module_set_error (const gchar *error)
{
+ gchar* module_error = g_static_private_get (&module_error_private);
if (module_error)
g_free (module_error);
if (error)
else
module_error = NULL;
errno = 0;
+ g_static_private_set (&module_error_private, module_error, g_free);
}
#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"
#else
#undef CHECK_ERROR
#define CHECK_ERROR(rv) { g_module_set_error ("unsupported"); return rv; }
+static gpointer
+_g_module_open (const gchar *file_name,
+ gboolean bind_lazy)
+{
+ 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 */
+#if defined (NATIVE_WIN32) && defined (__LCC__)
+int __stdcall
+LibMain (void *hinstDll,
+ unsigned long dwReason,
+ void *reserved)
+{
+ return 1;
+}
+#endif /* NATIVE_WIN32 && __LCC__ */
+
/* --- functions --- */
gboolean
g_module_supported (void)
{
CHECK_ERROR (FALSE);
-
+
return TRUE;
}
{
GModule *module;
gpointer handle;
-
+
CHECK_ERROR (NULL);
-
+
if (!file_name)
- {
+ {
+ G_LOCK (GModule);
if (!main_module)
{
handle = _g_module_self ();
main_module->file_name = NULL;
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;
}
}
+ G_UNLOCK (GModule);
return main_module;
}
-
+
/* we first search the module list by name */
module = g_module_find_by_name (file_name);
if (module)
{
module->ref_count++;
-
+
return module;
}
-
+
/* open the module */
handle = _g_module_open (file_name, (flags & G_MODULE_BIND_LAZY) != 0);
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);
-
+
return module;
}
-
- saved_error = module_error;
- module_error = NULL;
+
+ saved_error = g_module_error();
+ g_static_private_set (&module_error_private, NULL, NULL);
g_module_set_error (NULL);
-
+
module = g_new (GModule, 1);
module->file_name = g_strdup (file_name);
module->handle = handle;
module->ref_count = 1;
- module->de_init = NULL;
+ module->is_resident = FALSE;
+ module->unload = NULL;
+ G_LOCK (GModule);
module->next = modules;
modules = module;
-
+ G_UNLOCK (GModule);
+
/* 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_failed = check_init (module);
-
- /* we don't call de_init() if the initialization check failed. */
+
+ /* we don't call unload() if the initialization check failed. */
if (!check_failed)
- g_module_symbol (module, "g_module_de_init", &module->de_init);
-
+ g_module_symbol (module, "g_module_unload", (gpointer) &module->unload);
+
if (check_failed)
{
+ gchar *error;
+
+ error = g_strconcat ("GModule 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);
}
-
+
return module;
}
gboolean
-g_module_close (GModule *module)
+g_module_close (GModule *module)
{
CHECK_ERROR (FALSE);
g_return_val_if_fail (module != NULL, FALSE);
g_return_val_if_fail (module->ref_count > 0, FALSE);
- if (module != main_module)
- module->ref_count--;
+ module->ref_count--;
- if (!module->ref_count && module->de_init)
- module->de_init (module);
- if (!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 && !module->is_resident)
{
GModule *last;
GModule *node;
-
+
last = NULL;
+
+ G_LOCK (GModule);
node = modules;
while (node)
{
node = last->next;
}
module->next = NULL;
-
- _g_module_close (&module->handle, FALSE);
+ G_UNLOCK (GModule);
+
+ _g_module_close (module->handle, FALSE);
g_free (module->file_name);
-
+
g_free (module);
}
+
+ 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_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)
{
+ gchar *module_error;
if (symbol)
*symbol = NULL;
CHECK_ERROR (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);
-
+
#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 */
-
- if (module_error)
+
+ if ((module_error = g_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_module_name (GModule *module)
{
g_return_val_if_fail (module != NULL, NULL);
-
+
if (module == main_module)
return "main";
-
+
return module->file_name;
}
+
+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