* Lesser General Public License for more details.
*
* 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.
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
-#include <config.h>
+#include "config.h"
+
+#include <string.h>
#include "giomodule.h"
#include "giomodule-priv.h"
+#include "glocalfilemonitor.h"
+#include "glocaldirectorymonitor.h"
+#include "gnativevolumemonitor.h"
+#include "gproxyresolver.h"
+#include "gproxy.h"
+#include "gsettingsbackendinternal.h"
+#include "gsocks4proxy.h"
+#include "gsocks4aproxy.h"
+#include "gsocks5proxy.h"
+#include "gtlsbackend.h"
+#include "gvfs.h"
+#include "gnotificationbackend.h"
+#ifdef G_OS_WIN32
+#include "gregistrysettingsbackend.h"
+#endif
+#include <glib/gstdio.h>
-#include "gioalias.h"
+#ifdef G_OS_UNIX
+#include "gdesktopappinfo.h"
+#endif
/**
* SECTION:giomodule
* @short_description: Loadable GIO Modules
+ * @include: gio/gio.h
*
* Provides an interface and default functions for loading and unloading
- * modules. This is used internally to make gio extensible, but can also
- * be used by other to implement module loading.
+ * modules. This is used internally to make GIO extensible, but can also
+ * be used by others to implement module loading.
*
**/
+/**
+ * SECTION:extensionpoints
+ * @short_description: Extension Points
+ * @include: gio.h
+ * @see_also: [Extending GIO][extending-gio]
+ *
+ * #GIOExtensionPoint provides a mechanism for modules to extend the
+ * functionality of the library or application that loaded it in an
+ * organized fashion.
+ *
+ * An extension point is identified by a name, and it may optionally
+ * require that any implementation must be of a certain type (or derived
+ * thereof). Use g_io_extension_point_register() to register an
+ * extension point, and g_io_extension_point_set_required_type() to
+ * set a required type.
+ *
+ * A module can implement an extension point by specifying the #GType
+ * that implements the functionality. Additionally, each implementation
+ * of an extension point has a name, and a priority. Use
+ * g_io_extension_point_implement() to implement an extension point.
+ *
+ * |[<!-- language="C" -->
+ * GIOExtensionPoint *ep;
+ *
+ * // Register an extension point
+ * ep = g_io_extension_point_register ("my-extension-point");
+ * g_io_extension_point_set_required_type (ep, MY_TYPE_EXAMPLE);
+ * ]|
+ *
+ * |[<!-- language="C" -->
+ * // Implement an extension point
+ * G_DEFINE_TYPE (MyExampleImpl, my_example_impl, MY_TYPE_EXAMPLE);
+ * g_io_extension_point_implement ("my-extension-point",
+ * my_example_impl_get_type (),
+ * "my-example",
+ * 10);
+ * ]|
+ *
+ * It is up to the code that registered the extension point how
+ * it uses the implementations that have been associated with it.
+ * Depending on the use case, it may use all implementations, or
+ * only the one with the highest priority, or pick a specific
+ * one by name.
+ *
+ * To avoid opening all modules just to find out what extension
+ * points they implement, GIO makes use of a caching mechanism,
+ * see [gio-querymodules][gio-querymodules].
+ * You are expected to run this command after installing a
+ * GIO module.
+ *
+ * The `GIO_EXTRA_MODULES` environment variable can be used to
+ * specify additional directories to automatically load modules
+ * from. This environment variable has the same syntax as the
+ * `PATH`. If two modules have the same base name in different
+ * directories, then the latter one will be ignored. If additional
+ * directories are specified GIO will load modules from the built-in
+ * directory last.
+ */
+
+/**
+ * GIOModuleScope:
+ *
+ * Represents a scope for loading IO modules. A scope can be used for blocking
+ * duplicate modules, or blocking a module you don't want to load.
+ *
+ * The scope can be used with g_io_modules_load_all_in_directory_with_scope()
+ * or g_io_modules_scan_all_in_directory_with_scope().
+ *
+ * Since: 2.30
+ */
+struct _GIOModuleScope {
+ GIOModuleScopeFlags flags;
+ GHashTable *basenames;
+};
+
+/**
+ * g_io_module_scope_new:
+ * @flags: flags for the new scope
+ *
+ * Create a new scope for loading of IO modules. A scope can be used for
+ * blocking duplicate modules, or blocking a module you don't want to load.
+ *
+ * Specify the %G_IO_MODULE_SCOPE_BLOCK_DUPLICATES flag to block modules
+ * which have the same base name as a module that has already been seen
+ * in this scope.
+ *
+ * Returns: (transfer full): the new module scope
+ *
+ * Since: 2.30
+ */
+GIOModuleScope *
+g_io_module_scope_new (GIOModuleScopeFlags flags)
+{
+ GIOModuleScope *scope = g_new0 (GIOModuleScope, 1);
+ scope->flags = flags;
+ scope->basenames = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
+ return scope;
+}
+
+/**
+ * g_io_module_scope_free:
+ * @scope: a module loading scope
+ *
+ * Free a module scope.
+ *
+ * Since: 2.30
+ */
+void
+g_io_module_scope_free (GIOModuleScope *scope)
+{
+ if (!scope)
+ return;
+ g_hash_table_destroy (scope->basenames);
+ g_free (scope);
+}
+
+/**
+ * g_io_module_scope_block:
+ * @scope: a module loading scope
+ * @basename: the basename to block
+ *
+ * Block modules with the given @basename from being loaded when
+ * this scope is used with g_io_modules_scan_all_in_directory_with_scope()
+ * or g_io_modules_load_all_in_directory_with_scope().
+ *
+ * Since: 2.30
+ */
+void
+g_io_module_scope_block (GIOModuleScope *scope,
+ const gchar *basename)
+{
+ gchar *key;
+
+ g_return_if_fail (scope != NULL);
+ g_return_if_fail (basename != NULL);
+
+ key = g_strdup (basename);
+ g_hash_table_insert (scope->basenames, key, key);
+}
+
+static gboolean
+_g_io_module_scope_contains (GIOModuleScope *scope,
+ const gchar *basename)
+{
+ return g_hash_table_lookup (scope->basenames, basename) ? TRUE : FALSE;
+}
+
struct _GIOModule {
GTypeModule parent_instance;
-
+
gchar *filename;
GModule *library;
-
+ gboolean initialized; /* The module was loaded at least once */
+
void (* load) (GIOModule *module);
void (* unload) (GIOModule *module);
};
static gboolean g_io_module_load_module (GTypeModule *gmodule);
static void g_io_module_unload_module (GTypeModule *gmodule);
+struct _GIOExtension {
+ char *name;
+ GType type;
+ gint priority;
+};
+
+struct _GIOExtensionPoint {
+ GType required_type;
+ char *name;
+ GList *extensions;
+ GList *lazy_load_modules;
+};
+
+static GHashTable *extension_points = NULL;
+G_LOCK_DEFINE_STATIC(extension_points);
+
G_DEFINE_TYPE (GIOModule, g_io_module, G_TYPE_TYPE_MODULE);
static void
/* Make sure that the loaded library contains the required methods */
if (! g_module_symbol (module->library,
"g_io_module_load",
- (gpointer *) &module->load) ||
+ (gpointer) &module->load) ||
! g_module_symbol (module->library,
"g_io_module_unload",
- (gpointer *) &module->unload))
+ (gpointer) &module->unload))
{
g_printerr ("%s\n", g_module_error ());
g_module_close (module->library);
/* Initialize the loaded module */
module->load (module);
+ module->initialized = TRUE;
return TRUE;
}
}
static gboolean
-is_valid_module_name (const gchar *basename)
+is_valid_module_name (const gchar *basename,
+ GIOModuleScope *scope)
{
+ gboolean result;
+
#if !defined(G_OS_WIN32) && !defined(G_WITH_CYGWIN)
- return
- g_str_has_prefix (basename, "lib") &&
- g_str_has_suffix (basename, ".so");
+ if (!g_str_has_prefix (basename, "lib") ||
+ !g_str_has_suffix (basename, ".so"))
+ return FALSE;
#else
- return g_str_has_suffix (basename, ".dll");
+ if (!g_str_has_suffix (basename, ".dll"))
+ return FALSE;
#endif
+
+ result = TRUE;
+ if (scope)
+ {
+ result = _g_io_module_scope_contains (scope, basename) ? FALSE : TRUE;
+ if (result && (scope->flags & G_IO_MODULE_SCOPE_BLOCK_DUPLICATES))
+ g_io_module_scope_block (scope, basename);
+ }
+
+ return result;
}
+
/**
- * g_io_modules_load_all_in_directory:
+ * g_io_modules_scan_all_in_directory_with_scope:
+ * @dirname: pathname for a directory containing modules to scan.
+ * @scope: a scope to use when scanning the modules
+ *
+ * Scans all the modules in the specified directory, ensuring that
+ * any extension point implemented by a module is registered.
+ *
+ * This may not actually load and initialize all the types in each
+ * module, some modules may be lazily loaded and initialized when
+ * an extension point it implementes is used with e.g.
+ * g_io_extension_point_get_extensions() or
+ * g_io_extension_point_get_extension_by_name().
+ *
+ * If you need to guarantee that all types are loaded in all the modules,
+ * use g_io_modules_load_all_in_directory().
+ *
+ * Since: 2.30
+ **/
+void
+g_io_modules_scan_all_in_directory_with_scope (const char *dirname,
+ GIOModuleScope *scope)
+{
+ const gchar *name;
+ char *filename;
+ GDir *dir;
+ GStatBuf statbuf;
+ char *data;
+ time_t cache_mtime;
+ GHashTable *cache;
+
+ if (!g_module_supported ())
+ return;
+
+ dir = g_dir_open (dirname, 0, NULL);
+ if (!dir)
+ return;
+
+ filename = g_build_filename (dirname, "giomodule.cache", NULL);
+
+ cache = g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free, (GDestroyNotify)g_strfreev);
+
+ cache_mtime = 0;
+ if (g_stat (filename, &statbuf) == 0 &&
+ g_file_get_contents (filename, &data, NULL, NULL))
+ {
+ char **lines;
+ int i;
+
+ /* Cache mtime is the time the cache file was created, any file
+ * that has a ctime before this was created then and not modified
+ * since then (userspace can't change ctime). Its possible to change
+ * the ctime forward without changing the file content, by e.g.
+ * chmoding the file, but this is uncommon and will only cause us
+ * to not use the cache so will not cause bugs.
+ */
+ cache_mtime = statbuf.st_mtime;
+
+ lines = g_strsplit (data, "\n", -1);
+ g_free (data);
+
+ for (i = 0; lines[i] != NULL; i++)
+ {
+ char *line = lines[i];
+ char *file;
+ char *colon;
+ char **extension_points;
+
+ if (line[0] == '#')
+ continue;
+
+ colon = strchr (line, ':');
+ if (colon == NULL || line == colon)
+ continue; /* Invalid line, ignore */
+
+ *colon = 0; /* terminate filename */
+ file = g_strdup (line);
+ colon++; /* after colon */
+
+ while (g_ascii_isspace (*colon))
+ colon++;
+
+ extension_points = g_strsplit (colon, ",", -1);
+ g_hash_table_insert (cache, file, extension_points);
+ }
+ g_strfreev (lines);
+ }
+
+ while ((name = g_dir_read_name (dir)))
+ {
+ if (is_valid_module_name (name, scope))
+ {
+ GIOExtensionPoint *extension_point;
+ GIOModule *module;
+ gchar *path;
+ char **extension_points;
+ int i;
+
+ path = g_build_filename (dirname, name, NULL);
+ module = g_io_module_new (path);
+
+ extension_points = g_hash_table_lookup (cache, name);
+ if (extension_points != NULL &&
+ g_stat (path, &statbuf) == 0 &&
+ statbuf.st_ctime <= cache_mtime)
+ {
+ /* Lazy load/init the library when first required */
+ for (i = 0; extension_points[i] != NULL; i++)
+ {
+ extension_point =
+ g_io_extension_point_register (extension_points[i]);
+ extension_point->lazy_load_modules =
+ g_list_prepend (extension_point->lazy_load_modules,
+ module);
+ }
+ }
+ else
+ {
+ /* Try to load and init types */
+ if (g_type_module_use (G_TYPE_MODULE (module)))
+ g_type_module_unuse (G_TYPE_MODULE (module)); /* Unload */
+ else
+ { /* Failure to load */
+ g_printerr ("Failed to load module: %s\n", path);
+ g_object_unref (module);
+ g_free (path);
+ continue;
+ }
+ }
+
+ g_free (path);
+ }
+ }
+
+ g_dir_close (dir);
+
+ g_hash_table_destroy (cache);
+
+ g_free (filename);
+}
+
+/**
+ * g_io_modules_scan_all_in_directory:
+ * @dirname: pathname for a directory containing modules to scan.
+ *
+ * Scans all the modules in the specified directory, ensuring that
+ * any extension point implemented by a module is registered.
+ *
+ * This may not actually load and initialize all the types in each
+ * module, some modules may be lazily loaded and initialized when
+ * an extension point it implementes is used with e.g.
+ * g_io_extension_point_get_extensions() or
+ * g_io_extension_point_get_extension_by_name().
+ *
+ * If you need to guarantee that all types are loaded in all the modules,
+ * use g_io_modules_load_all_in_directory().
+ *
+ * Since: 2.24
+ **/
+void
+g_io_modules_scan_all_in_directory (const char *dirname)
+{
+ g_io_modules_scan_all_in_directory_with_scope (dirname, NULL);
+}
+
+/**
+ * g_io_modules_load_all_in_directory_with_scope:
* @dirname: pathname for a directory containing modules to load.
- *
- * Loads all the modules in the the specified directory.
- *
- * Returns: a list of #GIOModules loaded from the directory
+ * @scope: a scope to use when scanning the modules.
+ *
+ * Loads all the modules in the specified directory.
+ *
+ * If don't require all modules to be initialized (and thus registering
+ * all gtypes) then you can use g_io_modules_scan_all_in_directory()
+ * which allows delayed/lazy loading of modules.
+ *
+ * Returns: (element-type GIOModule) (transfer full): a list of #GIOModules loaded
+ * from the directory,
+ * All the modules are loaded into memory, if you want to
+ * unload them (enabling on-demand loading) you must call
+ * g_type_module_unuse() on all the modules. Free the list
+ * with g_list_free().
+ *
+ * Since: 2.30
**/
GList *
-g_io_modules_load_all_in_directory (const char *dirname)
+g_io_modules_load_all_in_directory_with_scope (const char *dirname,
+ GIOModuleScope *scope)
{
const gchar *name;
GDir *dir;
modules = NULL;
while ((name = g_dir_read_name (dir)))
{
- if (is_valid_module_name (name))
+ if (is_valid_module_name (name, scope))
{
GIOModule *module;
gchar *path;
g_free (path);
- g_type_module_unuse (G_TYPE_MODULE (module));
-
modules = g_list_prepend (modules, module);
}
}
return modules;
}
+/**
+ * g_io_modules_load_all_in_directory:
+ * @dirname: pathname for a directory containing modules to load.
+ *
+ * Loads all the modules in the specified directory.
+ *
+ * If don't require all modules to be initialized (and thus registering
+ * all gtypes) then you can use g_io_modules_scan_all_in_directory()
+ * which allows delayed/lazy loading of modules.
+ *
+ * Returns: (element-type GIOModule) (transfer full): a list of #GIOModules loaded
+ * from the directory,
+ * All the modules are loaded into memory, if you want to
+ * unload them (enabling on-demand loading) you must call
+ * g_type_module_unuse() on all the modules. Free the list
+ * with g_list_free().
+ **/
+GList *
+g_io_modules_load_all_in_directory (const char *dirname)
+{
+ return g_io_modules_load_all_in_directory_with_scope (dirname, NULL);
+}
+
+static gpointer
+try_class (GIOExtension *extension,
+ guint is_supported_offset)
+{
+ GType type = g_io_extension_get_type (extension);
+ typedef gboolean (*verify_func) (void);
+ gpointer class;
+
+ class = g_type_class_ref (type);
+ if (!is_supported_offset || (* G_STRUCT_MEMBER(verify_func, class, is_supported_offset)) ())
+ return class;
+
+ g_type_class_unref (class);
+ return NULL;
+}
+
+/**
+ * _g_io_module_get_default_type:
+ * @extension_point: the name of an extension point
+ * @envvar: (allow-none): the name of an environment variable to
+ * override the default implementation.
+ * @is_supported_offset: a vtable offset, or zero
+ *
+ * Retrieves the default class implementing @extension_point.
+ *
+ * If @envvar is not %NULL, and the environment variable with that
+ * name is set, then the implementation it specifies will be tried
+ * first. After that, or if @envvar is not set, all other
+ * implementations will be tried in order of decreasing priority.
+ *
+ * If @is_supported_offset is non-zero, then it is the offset into the
+ * class vtable at which there is a function that takes no arguments and
+ * returns a boolean. This function will be called on each candidate
+ * implementation to check if it is actually usable or not.
+ *
+ * The result is cached after it is generated the first time, and
+ * the function is thread-safe.
+ *
+ * Returns: (transfer none): an object implementing
+ * @extension_point, or %NULL if there are no usable
+ * implementations.
+ */
+GType
+_g_io_module_get_default_type (const gchar *extension_point,
+ const gchar *envvar,
+ guint is_supported_offset)
+{
+ static GRecMutex default_modules_lock;
+ static GHashTable *default_modules;
+ const char *use_this;
+ GList *l;
+ GIOExtensionPoint *ep;
+ GIOExtension *extension, *preferred;
+ gpointer impl;
+
+ g_rec_mutex_lock (&default_modules_lock);
+ if (default_modules)
+ {
+ gpointer key;
+
+ if (g_hash_table_lookup_extended (default_modules, extension_point, &key, &impl))
+ {
+ g_rec_mutex_unlock (&default_modules_lock);
+ return impl ? G_OBJECT_CLASS_TYPE (impl) : G_TYPE_INVALID;
+ }
+ }
+ else
+ {
+ default_modules = g_hash_table_new (g_str_hash, g_str_equal);
+ }
+
+ _g_io_modules_ensure_loaded ();
+ ep = g_io_extension_point_lookup (extension_point);
+
+ if (!ep)
+ {
+ g_warn_if_reached ();
+ g_rec_mutex_unlock (&default_modules_lock);
+ return G_TYPE_INVALID;
+ }
+
+ use_this = envvar ? g_getenv (envvar) : NULL;
+ if (use_this)
+ {
+ preferred = g_io_extension_point_get_extension_by_name (ep, use_this);
+ if (preferred)
+ {
+ impl = try_class (preferred, is_supported_offset);
+ if (impl)
+ goto done;
+ }
+ else
+ g_warning ("Can't find module '%s' specified in %s", use_this, envvar);
+ }
+ else
+ preferred = NULL;
+
+ for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
+ {
+ extension = l->data;
+ if (extension == preferred)
+ continue;
+
+ impl = try_class (extension, is_supported_offset);
+ if (impl)
+ goto done;
+ }
+
+ impl = NULL;
+
+ done:
+ g_hash_table_insert (default_modules, g_strdup (extension_point), impl);
+ g_rec_mutex_unlock (&default_modules_lock);
+
+ return impl ? G_OBJECT_CLASS_TYPE (impl) : G_TYPE_INVALID;
+}
+
+static gpointer
+try_implementation (GIOExtension *extension,
+ GIOModuleVerifyFunc verify_func)
+{
+ GType type = g_io_extension_get_type (extension);
+ gpointer impl;
+
+ if (g_type_is_a (type, G_TYPE_INITABLE))
+ return g_initable_new (type, NULL, NULL, NULL);
+ else
+ {
+ impl = g_object_new (type, NULL);
+ if (!verify_func || verify_func (impl))
+ return impl;
+
+ g_object_unref (impl);
+ return NULL;
+ }
+}
+
+/**
+ * _g_io_module_get_default:
+ * @extension_point: the name of an extension point
+ * @envvar: (allow-none): the name of an environment variable to
+ * override the default implementation.
+ * @verify_func: (allow-none): a function to call to verify that
+ * a given implementation is usable in the current environment.
+ *
+ * Retrieves the default object implementing @extension_point.
+ *
+ * If @envvar is not %NULL, and the environment variable with that
+ * name is set, then the implementation it specifies will be tried
+ * first. After that, or if @envvar is not set, all other
+ * implementations will be tried in order of decreasing priority.
+ *
+ * If an extension point implementation implements #GInitable, then
+ * that implementation will only be used if it initializes
+ * successfully. Otherwise, if @verify_func is not %NULL, then it will
+ * be called on each candidate implementation after construction, to
+ * check if it is actually usable or not.
+ *
+ * The result is cached after it is generated the first time, and
+ * the function is thread-safe.
+ *
+ * Returns: (transfer none): an object implementing
+ * @extension_point, or %NULL if there are no usable
+ * implementations.
+ */
+gpointer
+_g_io_module_get_default (const gchar *extension_point,
+ const gchar *envvar,
+ GIOModuleVerifyFunc verify_func)
+{
+ static GRecMutex default_modules_lock;
+ static GHashTable *default_modules;
+ const char *use_this;
+ GList *l;
+ GIOExtensionPoint *ep;
+ GIOExtension *extension, *preferred;
+ gpointer impl;
+
+ g_rec_mutex_lock (&default_modules_lock);
+ if (default_modules)
+ {
+ gpointer key;
+
+ if (g_hash_table_lookup_extended (default_modules, extension_point,
+ &key, &impl))
+ {
+ g_rec_mutex_unlock (&default_modules_lock);
+ return impl;
+ }
+ }
+ else
+ {
+ default_modules = g_hash_table_new (g_str_hash, g_str_equal);
+ }
+
+ _g_io_modules_ensure_loaded ();
+ ep = g_io_extension_point_lookup (extension_point);
+
+ if (!ep)
+ {
+ g_warn_if_reached ();
+ g_rec_mutex_unlock (&default_modules_lock);
+ return NULL;
+ }
+
+ use_this = envvar ? g_getenv (envvar) : NULL;
+ if (use_this)
+ {
+ preferred = g_io_extension_point_get_extension_by_name (ep, use_this);
+ if (preferred)
+ {
+ impl = try_implementation (preferred, verify_func);
+ if (impl)
+ goto done;
+ }
+ else
+ g_warning ("Can't find module '%s' specified in %s", use_this, envvar);
+ }
+ else
+ preferred = NULL;
+
+ for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
+ {
+ extension = l->data;
+ if (extension == preferred)
+ continue;
+
+ impl = try_implementation (extension, verify_func);
+ if (impl)
+ goto done;
+ }
+
+ impl = NULL;
+
+ done:
+ g_hash_table_insert (default_modules,
+ g_strdup (extension_point),
+ impl ? g_object_ref (impl) : NULL);
+ g_rec_mutex_unlock (&default_modules_lock);
+
+ return impl;
+}
+
+G_LOCK_DEFINE_STATIC (registered_extensions);
G_LOCK_DEFINE_STATIC (loaded_dirs);
+extern GType _g_fen_directory_monitor_get_type (void);
+extern GType _g_fen_file_monitor_get_type (void);
+extern GType _g_inotify_directory_monitor_get_type (void);
+extern GType _g_inotify_file_monitor_get_type (void);
+extern GType _g_kqueue_directory_monitor_get_type (void);
+extern GType _g_kqueue_file_monitor_get_type (void);
+extern GType _g_unix_volume_monitor_get_type (void);
+extern GType _g_local_vfs_get_type (void);
+
+extern GType _g_win32_volume_monitor_get_type (void);
+extern GType g_win32_directory_monitor_get_type (void);
+extern GType _g_winhttp_vfs_get_type (void);
+
+extern GType _g_dummy_proxy_resolver_get_type (void);
+extern GType _g_dummy_tls_backend_get_type (void);
+extern GType g_network_monitor_base_get_type (void);
+#ifdef HAVE_NETLINK
+extern GType _g_network_monitor_netlink_get_type (void);
+#endif
+
+#ifdef G_OS_UNIX
+extern GType g_fdo_notification_backend_get_type (void);
+extern GType g_gtk_notification_backend_get_type (void);
+#endif
+
+#ifdef G_PLATFORM_WIN32
+
+#include <windows.h>
+
+static HMODULE gio_dll = NULL;
+
+#ifdef DLL_EXPORT
+
+BOOL WINAPI DllMain (HINSTANCE hinstDLL,
+ DWORD fdwReason,
+ LPVOID lpvReserved);
+
+BOOL WINAPI
+DllMain (HINSTANCE hinstDLL,
+ DWORD fdwReason,
+ LPVOID lpvReserved)
+{
+ if (fdwReason == DLL_PROCESS_ATTACH)
+ gio_dll = hinstDLL;
+
+ return TRUE;
+}
+
+#endif
+
+void *
+_g_io_win32_get_module (void)
+{
+ if (!gio_dll)
+ GetModuleHandleExA (GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
+ (const char *) _g_io_win32_get_module,
+ &gio_dll);
+ return gio_dll;
+}
+
+#undef GIO_MODULE_DIR
+
+/* GIO_MODULE_DIR is used only in code called just once,
+ * so no problem leaking this
+ */
+#define GIO_MODULE_DIR \
+ g_build_filename (g_win32_get_package_installation_directory_of_module (gio_dll), \
+ "lib/gio/modules", \
+ NULL)
+
+#endif
+
+void
+_g_io_modules_ensure_extension_points_registered (void)
+{
+ static gboolean registered_extensions = FALSE;
+ GIOExtensionPoint *ep;
+
+ G_LOCK (registered_extensions);
+
+ if (!registered_extensions)
+ {
+ registered_extensions = TRUE;
+
+#ifdef G_OS_UNIX
+#if !GLIB_CHECK_VERSION (3, 0, 0)
+ ep = g_io_extension_point_register (G_DESKTOP_APP_INFO_LOOKUP_EXTENSION_POINT_NAME);
+ G_GNUC_BEGIN_IGNORE_DEPRECATIONS
+ g_io_extension_point_set_required_type (ep, G_TYPE_DESKTOP_APP_INFO_LOOKUP);
+ G_GNUC_END_IGNORE_DEPRECATIONS
+#endif
+#endif
+
+ ep = g_io_extension_point_register (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_DIRECTORY_MONITOR);
+
+ ep = g_io_extension_point_register (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_FILE_MONITOR);
+
+ ep = g_io_extension_point_register (G_NFS_DIRECTORY_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_DIRECTORY_MONITOR);
+
+ ep = g_io_extension_point_register (G_NFS_FILE_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_FILE_MONITOR);
+
+ ep = g_io_extension_point_register (G_VOLUME_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_VOLUME_MONITOR);
+
+ ep = g_io_extension_point_register (G_NATIVE_VOLUME_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_NATIVE_VOLUME_MONITOR);
+
+ ep = g_io_extension_point_register (G_VFS_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_VFS);
+
+ ep = g_io_extension_point_register ("gsettings-backend");
+ g_io_extension_point_set_required_type (ep, G_TYPE_OBJECT);
+
+ ep = g_io_extension_point_register (G_PROXY_RESOLVER_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_PROXY_RESOLVER);
+
+ ep = g_io_extension_point_register (G_PROXY_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_PROXY);
+
+ ep = g_io_extension_point_register (G_TLS_BACKEND_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_TLS_BACKEND);
+
+ ep = g_io_extension_point_register (G_NETWORK_MONITOR_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_NETWORK_MONITOR);
+
+ ep = g_io_extension_point_register (G_NOTIFICATION_BACKEND_EXTENSION_POINT_NAME);
+ g_io_extension_point_set_required_type (ep, G_TYPE_NOTIFICATION_BACKEND);
+ }
+
+ G_UNLOCK (registered_extensions);
+}
+
void
_g_io_modules_ensure_loaded (void)
{
- GList *modules;
- const char *directory;
static gboolean loaded_dirs = FALSE;
+ const char *module_path;
+ GIOModuleScope *scope;
+ const gchar *module_dir;
+ _g_io_modules_ensure_extension_points_registered ();
G_LOCK (loaded_dirs);
if (!loaded_dirs)
{
loaded_dirs = TRUE;
- modules = g_io_modules_load_all_in_directory (GIO_MODULE_DIR);
+ scope = g_io_module_scope_new (G_IO_MODULE_SCOPE_BLOCK_DUPLICATES);
+
+ /* First load any overrides, extras */
+ module_path = g_getenv ("GIO_EXTRA_MODULES");
+ if (module_path)
+ {
+ gchar **paths;
+ int i;
+
+ paths = g_strsplit (module_path, G_SEARCHPATH_SEPARATOR_S, 0);
+
+ for (i = 0; paths[i] != NULL; i++)
+ {
+ g_io_modules_scan_all_in_directory_with_scope (paths[i], scope);
+ }
+
+ g_strfreev (paths);
+ }
+
+ /* Then load the compiled in path */
+ module_dir = g_getenv ("GIO_MODULE_DIR");
+ if (module_dir == NULL)
+ module_dir = GIO_MODULE_DIR;
+
+ g_io_modules_scan_all_in_directory_with_scope (module_dir, scope);
+
+ g_io_module_scope_free (scope);
+
+ /* Initialize types from built-in "modules" */
+ g_type_ensure (g_null_settings_backend_get_type ());
+ g_type_ensure (g_memory_settings_backend_get_type ());
+#if defined(HAVE_INOTIFY_INIT1)
+ g_type_ensure (_g_inotify_directory_monitor_get_type ());
+ g_type_ensure (_g_inotify_file_monitor_get_type ());
+#endif
+#if defined(HAVE_KQUEUE)
+ g_type_ensure (_g_kqueue_directory_monitor_get_type ());
+ g_type_ensure (_g_kqueue_file_monitor_get_type ());
+#endif
+#if defined(HAVE_FEN)
+ g_type_ensure (_g_fen_directory_monitor_get_type ());
+ g_type_ensure (_g_fen_file_monitor_get_type ());
+#endif
+#ifdef G_OS_WIN32
+ g_type_ensure (_g_win32_volume_monitor_get_type ());
+ g_type_ensure (g_win32_directory_monitor_get_type ());
+ g_type_ensure (g_registry_backend_get_type ());
+#endif
+#ifdef HAVE_COCOA
+ g_nextstep_settings_backend_get_type ();
+#endif
+#ifdef G_OS_UNIX
+ g_type_ensure (_g_unix_volume_monitor_get_type ());
+ g_type_ensure (g_fdo_notification_backend_get_type ());
+ g_type_ensure (g_gtk_notification_backend_get_type ());
+#endif
+#ifdef G_OS_WIN32
+ g_type_ensure (_g_winhttp_vfs_get_type ());
+#endif
+ g_type_ensure (_g_local_vfs_get_type ());
+ g_type_ensure (_g_dummy_proxy_resolver_get_type ());
+ g_type_ensure (_g_socks4a_proxy_get_type ());
+ g_type_ensure (_g_socks4_proxy_get_type ());
+ g_type_ensure (_g_socks5_proxy_get_type ());
+ g_type_ensure (_g_dummy_tls_backend_get_type ());
+ g_type_ensure (g_network_monitor_base_get_type ());
+#ifdef HAVE_NETLINK
+ g_type_ensure (_g_network_monitor_netlink_get_type ());
+#endif
}
-
+
G_UNLOCK (loaded_dirs);
}
-#define __G_IO_MODULE_C__
-#include "gioaliasdef.c"
+static void
+g_io_extension_point_free (GIOExtensionPoint *ep)
+{
+ g_free (ep->name);
+ g_free (ep);
+}
+
+/**
+ * g_io_extension_point_register:
+ * @name: The name of the extension point
+ *
+ * Registers an extension point.
+ *
+ * Returns: (transfer none): the new #GIOExtensionPoint. This object is
+ * owned by GIO and should not be freed.
+ */
+GIOExtensionPoint *
+g_io_extension_point_register (const char *name)
+{
+ GIOExtensionPoint *ep;
+
+ G_LOCK (extension_points);
+ if (extension_points == NULL)
+ extension_points = g_hash_table_new_full (g_str_hash,
+ g_str_equal,
+ NULL,
+ (GDestroyNotify)g_io_extension_point_free);
+
+ ep = g_hash_table_lookup (extension_points, name);
+ if (ep != NULL)
+ {
+ G_UNLOCK (extension_points);
+ return ep;
+ }
+
+ ep = g_new0 (GIOExtensionPoint, 1);
+ ep->name = g_strdup (name);
+
+ g_hash_table_insert (extension_points, ep->name, ep);
+
+ G_UNLOCK (extension_points);
+
+ return ep;
+}
+
+/**
+ * g_io_extension_point_lookup:
+ * @name: the name of the extension point
+ *
+ * Looks up an existing extension point.
+ *
+ * Returns: (transfer none): the #GIOExtensionPoint, or %NULL if there
+ * is no registered extension point with the given name.
+ */
+GIOExtensionPoint *
+g_io_extension_point_lookup (const char *name)
+{
+ GIOExtensionPoint *ep;
+
+ G_LOCK (extension_points);
+ ep = NULL;
+ if (extension_points != NULL)
+ ep = g_hash_table_lookup (extension_points, name);
+
+ G_UNLOCK (extension_points);
+
+ return ep;
+
+}
+
+/**
+ * g_io_extension_point_set_required_type:
+ * @extension_point: a #GIOExtensionPoint
+ * @type: the #GType to require
+ *
+ * Sets the required type for @extension_point to @type.
+ * All implementations must henceforth have this type.
+ */
+void
+g_io_extension_point_set_required_type (GIOExtensionPoint *extension_point,
+ GType type)
+{
+ extension_point->required_type = type;
+}
+
+/**
+ * g_io_extension_point_get_required_type:
+ * @extension_point: a #GIOExtensionPoint
+ *
+ * Gets the required type for @extension_point.
+ *
+ * Returns: the #GType that all implementations must have,
+ * or #G_TYPE_INVALID if the extension point has no required type
+ */
+GType
+g_io_extension_point_get_required_type (GIOExtensionPoint *extension_point)
+{
+ return extension_point->required_type;
+}
+
+static void
+lazy_load_modules (GIOExtensionPoint *extension_point)
+{
+ GIOModule *module;
+ GList *l;
+
+ for (l = extension_point->lazy_load_modules; l != NULL; l = l->next)
+ {
+ module = l->data;
+
+ if (!module->initialized)
+ {
+ if (g_type_module_use (G_TYPE_MODULE (module)))
+ g_type_module_unuse (G_TYPE_MODULE (module)); /* Unload */
+ else
+ g_printerr ("Failed to load module: %s\n",
+ module->filename);
+ }
+ }
+}
+
+/**
+ * g_io_extension_point_get_extensions:
+ * @extension_point: a #GIOExtensionPoint
+ *
+ * Gets a list of all extensions that implement this extension point.
+ * The list is sorted by priority, beginning with the highest priority.
+ *
+ * Returns: (element-type GIOExtension) (transfer none): a #GList of
+ * #GIOExtensions. The list is owned by GIO and should not be
+ * modified.
+ */
+GList *
+g_io_extension_point_get_extensions (GIOExtensionPoint *extension_point)
+{
+ lazy_load_modules (extension_point);
+ return extension_point->extensions;
+}
+
+/**
+ * g_io_extension_point_get_extension_by_name:
+ * @extension_point: a #GIOExtensionPoint
+ * @name: the name of the extension to get
+ *
+ * Finds a #GIOExtension for an extension point by name.
+ *
+ * Returns: (transfer none): the #GIOExtension for @extension_point that has the
+ * given name, or %NULL if there is no extension with that name
+ */
+GIOExtension *
+g_io_extension_point_get_extension_by_name (GIOExtensionPoint *extension_point,
+ const char *name)
+{
+ GList *l;
+
+ g_return_val_if_fail (name != NULL, NULL);
+
+ lazy_load_modules (extension_point);
+ for (l = extension_point->extensions; l != NULL; l = l->next)
+ {
+ GIOExtension *e = l->data;
+
+ if (e->name != NULL &&
+ strcmp (e->name, name) == 0)
+ return e;
+ }
+
+ return NULL;
+}
+
+static gint
+extension_prio_compare (gconstpointer a,
+ gconstpointer b)
+{
+ const GIOExtension *extension_a = a, *extension_b = b;
+
+ if (extension_a->priority > extension_b->priority)
+ return -1;
+
+ if (extension_b->priority > extension_a->priority)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * g_io_extension_point_implement:
+ * @extension_point_name: the name of the extension point
+ * @type: the #GType to register as extension
+ * @extension_name: the name for the extension
+ * @priority: the priority for the extension
+ *
+ * Registers @type as extension for the extension point with name
+ * @extension_point_name.
+ *
+ * If @type has already been registered as an extension for this
+ * extension point, the existing #GIOExtension object is returned.
+ *
+ * Returns: (transfer none): a #GIOExtension object for #GType
+ */
+GIOExtension *
+g_io_extension_point_implement (const char *extension_point_name,
+ GType type,
+ const char *extension_name,
+ gint priority)
+{
+ GIOExtensionPoint *extension_point;
+ GIOExtension *extension;
+ GList *l;
+
+ g_return_val_if_fail (extension_point_name != NULL, NULL);
+
+ extension_point = g_io_extension_point_lookup (extension_point_name);
+ if (extension_point == NULL)
+ {
+ g_warning ("Tried to implement non-registered extension point %s", extension_point_name);
+ return NULL;
+ }
+
+ if (extension_point->required_type != 0 &&
+ !g_type_is_a (type, extension_point->required_type))
+ {
+ g_warning ("Tried to register an extension of the type %s to extension point %s. "
+ "Expected type is %s.",
+ g_type_name (type),
+ extension_point_name,
+ g_type_name (extension_point->required_type));
+ return NULL;
+ }
+
+ /* It's safe to register the same type multiple times */
+ for (l = extension_point->extensions; l != NULL; l = l->next)
+ {
+ extension = l->data;
+ if (extension->type == type)
+ return extension;
+ }
+
+ extension = g_slice_new0 (GIOExtension);
+ extension->type = type;
+ extension->name = g_strdup (extension_name);
+ extension->priority = priority;
+
+ extension_point->extensions = g_list_insert_sorted (extension_point->extensions,
+ extension, extension_prio_compare);
+
+ return extension;
+}
+
+/**
+ * g_io_extension_ref_class:
+ * @extension: a #GIOExtension
+ *
+ * Gets a reference to the class for the type that is
+ * associated with @extension.
+ *
+ * Returns: (transfer full): the #GTypeClass for the type of @extension
+ */
+GTypeClass *
+g_io_extension_ref_class (GIOExtension *extension)
+{
+ return g_type_class_ref (extension->type);
+}
+
+/**
+ * g_io_extension_get_type:
+ * @extension: a #GIOExtension
+ *
+ * Gets the type associated with @extension.
+ *
+ * Returns: the type of @extension
+ */
+GType
+g_io_extension_get_type (GIOExtension *extension)
+{
+ return extension->type;
+}
+
+/**
+ * g_io_extension_get_name:
+ * @extension: a #GIOExtension
+ *
+ * Gets the name under which @extension was registered.
+ *
+ * Note that the same type may be registered as extension
+ * for multiple extension points, under different names.
+ *
+ * Returns: the name of @extension.
+ */
+const char *
+g_io_extension_get_name (GIOExtension *extension)
+{
+ return extension->name;
+}
+
+/**
+ * g_io_extension_get_priority:
+ * @extension: a #GIOExtension
+ *
+ * Gets the priority with which @extension was registered.
+ *
+ * Returns: the priority of @extension
+ */
+gint
+g_io_extension_get_priority (GIOExtension *extension)
+{
+ return extension->priority;
+}
projects / platform / upstream / glib.git / blobdiff