1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright © 2011 Red Hat, Inc
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Authors: Alexander Larsson <alexl@redhat.com>
27 #include "gresource.h"
28 #include <gvdb/gvdb-reader.h>
30 #include <gio/gmemoryinputstream.h>
31 #include <gio/gzlibdecompressor.h>
32 #include <gio/gconverterinputstream.h>
41 static void register_lazy_static_resources ();
43 G_DEFINE_BOXED_TYPE (GResource, g_resource, g_resource_ref, g_resource_unref)
47 * @short_description: Resource framework
50 * Applications and libraries often contain binary or textual data that is really part of the
51 * application, rather than user data. For instance #GtkBuilder .ui files, splashscreen images,
52 * GMenu markup xml, CSS files, icons, etc. These are often shipped as files in <filename>$datadir/appname</filename>, or
53 * manually included as literal strings in the code.
55 * The #GResource API and the <link linkend="glib-compile-resources">glib-compile-resources</link> program
56 * provide a convenient and efficient alternative to this which has some nice properties. You
57 * maintain the files as normal files, so its easy to edit them, but during the build the files
58 * are combined into a binary bundle that is linked into the executable. This means that loading
59 * the resource files are efficient (as they are already in memory, shared with other instances) and
60 * simple (no need to check for things like I/O errors or locate the files in the filesystem). It
61 * also makes it easier to create relocatable applications.
63 * Resource files can also be marked as compresses. Such files will be included in the resource bundle
64 * in a compressed form, but will be automatically uncompressed when the resource is used. This
65 * is very useful e.g. for larger text files that are parsed once (or rarely) and then thrown away.
67 * Resource files can also be marked to be preprocessed, by setting the value of the
68 * <literal>preprocess</literal> attribute to a comma-separated list of preprocessing options.
69 * The only options currently supported are:
71 * <literal>xml-stripblanks</literal> which will use <command>xmllint</command> to strip
72 * ignorable whitespace from the xml file. For this to work, the <envar>XMLLINT</envar>
73 * environment variable must be set to the full path to the xmllint executable, or xmllint
74 * must be in the PATH; otherwise the preprocessing step is skipped.
76 * <literal>to-pixdata</literal> which will use <command>gdk-pixbuf-pixdata</command> to convert
77 * images to the GdkPixdata format, which allows you to create pixbufs directly using the data inside
78 * the resource file, rather than an (uncompressed) copy if it. For this, the gdk-pixbuf-pixdata
79 * program must be in the PATH, or the <envar>GDK_PIXBUF_PIXDATA</envar> environment variable must be
80 * set to the full path to the gdk-pixbuf-pixdata executable; otherwise the resource compiler will
83 * Resource bundles are created by the <link linkend="glib-compile-resources">glib-compile-resources</link> program
84 * which takes an xml file that describes the bundle, and a set of files that the xml references. These
85 * are combined into a binary resource bundle.
87 * <example id="resource-example"><title>Example resource description</title>
88 * <programlisting><![CDATA[
89 * <?xml version="1.0" encoding="UTF-8"?>
91 * <gresource prefix="/org/gtk/Example">
92 * <file>data/splashscreen.png</file>
93 * <file compressed="true">dialog.ui</file>
94 * <file preprocess="xml-stripblanks">menumarkup.xml</file>
97 * ]]></programlisting></example>
99 * This will create a resource bundle with the following files:
100 * <programlisting><![CDATA[
101 * /org/gtk/Example/data/splashscreen.png
102 * /org/gtk/Example/dialog.ui
103 * /org/gtk/Example/menumarkup.xml
104 * ]]></programlisting>
106 * Note that all resources in the process share the same namespace, so use java-style
107 * path prefixes (like in the above example) to avoid conflicts.
109 * You can then use <link linkend="glib-compile-resources">glib-compile-resources</link> to compile the xml to a
110 * binary bundle that you can load with g_resource_load(). However, its more common to use the --generate-source and
111 * --generate-header arguments to create a source file and header to link directly into your application.
113 * Once a #GResource has been created and registered all the data in it can be accessed globally in the process by
114 * using API calls like g_resources_open_stream() to stream the data or g_resources_lookup_data() to get a direct pointer
115 * to the data. You can also use uris like "resource:///org/gtk/Example/data/splashscreen.png" with #GFile to access
118 * There are two forms of the generated source, the default version uses the compiler support for constructor
119 * and destructor functions (where availible) to automatically create and register the #GResource on startup
120 * or library load time. If you pass --manual-register two functions to register/unregister the resource is instead
121 * created. This requires an explicit initialization call in your application/library, but it works on all platforms,
122 * even on the minor ones where this is not availible. (Constructor support is availible for at least Win32, MacOS and Linux.)
124 * Note that resource data can point directly into the data segment of e.g. a library, so if you are unloading libraries
125 * during runtime you need to be very careful with keeping around pointers to data from a resource, as this goes away
126 * when the library is unloaded. However, in practice this is not generally a problem, since most resource accesses
127 * is for your own resources, and resource data is often used once, during parsing, and then released.
133 * g_resource_error_quark:
135 * Gets the #GResource Error Quark.
137 * Return value: a #GQuark.
142 g_resource_error_quark (void)
144 return g_quark_from_static_string ("g-resource-error-quark");
149 * @resource: A #GResource.
151 * Atomically increments the reference count of @array by one. This
152 * function is MT-safe and may be called from any thread.
154 * Returns: The passed in #GResource.
159 g_resource_ref (GResource *resource)
161 g_atomic_int_inc (&resource->ref_count);
167 * @resource: A #GResource.
169 * Atomically decrements the reference count of @resource by one. If the
170 * reference count drops to 0, all memory allocated by the array is
171 * released. This function is MT-safe and may be called from any
177 g_resource_unref (GResource *resource)
179 if (g_atomic_int_dec_and_test (&resource->ref_count))
181 gvdb_table_unref (resource->table);
187 * g_resource_new_from_data:
189 * @error: return location for a #GError, or %NULL.
191 * Creates a GResource from a reference to the binary resource bundle.
192 * This will keep a reference to @data while the resource lives, so
193 * the data should not be modified or freed.
195 * If you want to use this resource in the global resource namespace you need
196 * to register it with g_resources_register().
198 * Return value: (transfer full): a new #GResource, or %NULL on error.
203 g_resource_new_from_data (GBytes *data,
209 table = gvdb_table_new_from_data (g_bytes_get_data (data, NULL),
210 g_bytes_get_size (data),
213 (GvdbRefFunc)g_bytes_ref,
214 (GDestroyNotify)g_bytes_unref,
220 resource = g_new0 (GResource, 1);
221 resource->ref_count = 1;
222 resource->table = table;
229 * @filename: (type filename): the path of a filename to load, in the GLib filename encoding.
230 * @error: return location for a #GError, or %NULL.
232 * Loads a binary resource bundle and creates a #GResource representation of it, allowing
233 * you to query it for data.
235 * If you want to use this resource in the global resource namespace you need
236 * to register it with g_resources_register().
238 * Return value: (transfer full): a new #GResource, or %NULL on error.
243 g_resource_load (const gchar *filename,
249 table = gvdb_table_new (filename, FALSE, error);
253 resource = g_new0 (GResource, 1);
254 resource->table = table;
259 static gboolean do_lookup (GResource *resource,
261 GResourceLookupFlags lookup_flags,
268 char *free_path = NULL;
270 gboolean res = FALSE;
273 path_len = strlen (path);
274 if (path[path_len-1] == '/')
276 path = free_path = g_strdup (path);
277 free_path[path_len-1] = 0;
280 value = gvdb_table_get_value (resource->table, path);
284 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
285 _("The resource at '%s' does not exist"),
290 guint32 _size, _flags;
293 g_variant_get (value, "(uu@ay)",
303 *data = g_variant_get_data (array);
306 /* Don't report trailing newline that non-compressed files has */
307 if (_flags & G_RESOURCE_FLAGS_COMPRESSED)
308 *data_size = g_variant_get_size (array);
310 *data_size = g_variant_get_size (array) - 1;
312 g_variant_unref (array);
322 * g_resource_open_stream:
323 * @resource: A #GResource.
324 * @path: A pathname inside the resource.
325 * @lookup_flags: A #GResourceLookupFlags.
326 * @error: return location for a #GError, or %NULL.
328 * Looks for a file at the specified @path in the resource and
329 * returns a #GInputStream that lets you read the data.
331 * @lookup_flags controls the behaviour of the lookup.
333 * Returns: (transfer full): #GInputStream or %NULL on error.
334 * Free the returned object with g_object_unref().
339 g_resource_open_stream (GResource *resource,
341 GResourceLookupFlags lookup_flags,
347 GInputStream *stream, *stream2;
349 if (!do_lookup (resource, path, lookup_flags, NULL, &flags, &data, &data_size, error))
352 stream = g_memory_input_stream_new_from_data (data, data_size, NULL);
353 g_object_set_data_full (G_OBJECT (stream), "g-resource",
354 g_resource_ref (resource),
355 (GDestroyNotify)g_resource_unref);
357 if (flags & G_RESOURCE_FLAGS_COMPRESSED)
359 GZlibDecompressor *decompressor =
360 g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_ZLIB);
362 stream2 = g_converter_input_stream_new (stream, G_CONVERTER (decompressor));
363 g_object_unref (decompressor);
364 g_object_unref (stream);
372 * g_resource_lookup_data:
373 * @resource: A #GResource.
374 * @path: A pathname inside the resource.
375 * @lookup_flags: A #GResourceLookupFlags.
376 * @error: return location for a #GError, or %NULL.
378 * Looks for a file at the specified @path in the resource and
379 * returns a #GBytes that lets you directly access the data in
382 * The data is always followed by a zero byte, so you
383 * can safely use the data as a C string. However, that byte
384 * is not included in the size of the GBytes.
386 * For uncompressed resource files this is a pointer directly into
387 * the resource bundle, which is typically in some readonly data section
388 * in the program binary. For compressed files we allocate memory on
389 * the heap and automatically uncompress the data.
391 * @lookup_flags controls the behaviour of the lookup.
393 * Returns: (transfer full): #GBytes or %NULL on error.
394 * Free the returned object with g_bytes_unref().
399 g_resource_lookup_data (GResource *resource,
401 GResourceLookupFlags lookup_flags,
409 if (!do_lookup (resource, path, lookup_flags, &size, &flags, &data, &data_size, error))
412 if (flags & G_RESOURCE_FLAGS_COMPRESSED)
414 char *uncompressed, *d;
416 GConverterResult res;
417 gsize d_size, s_size;
418 gsize bytes_read, bytes_written;
421 GZlibDecompressor *decompressor =
422 g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_ZLIB);
424 uncompressed = g_malloc (size + 1);
433 res = g_converter_convert (G_CONVERTER (decompressor),
436 G_CONVERTER_INPUT_AT_END,
440 if (res == G_CONVERTER_ERROR)
442 g_free (uncompressed);
443 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_INTERNAL,
444 _("The resource at '%s' failed to decompress"),
450 s_size -= bytes_read;
452 d_size -= bytes_written;
454 while (res != G_CONVERTER_FINISHED);
456 uncompressed[size] = 0; /* Zero terminate */
458 return g_bytes_new_take (uncompressed, size);
461 return g_bytes_new_with_free_func (data, data_size, (GDestroyNotify)g_resource_unref, g_resource_ref (resource));
465 * g_resource_get_info:
466 * @resource: A #GResource.
467 * @path: A pathname inside the resource.
468 * @lookup_flags: A #GResourceLookupFlags.
469 * @size: (out) (allow-none): a location to place the length of the contents of the file,
470 * or %NULL if the length is not needed
471 * @flags: (out) (allow-none): a location to place the flags about the file,
472 * or %NULL if the length is not needed
473 * @error: return location for a #GError, or %NULL.
475 * Looks for a file at the specified @path in the resource and
476 * if found returns information about it.
478 * @lookup_flags controls the behaviour of the lookup.
480 * Returns: %TRUE if the file was found. %FALSE if there were errors.
485 g_resource_get_info (GResource *resource,
487 GResourceLookupFlags lookup_flags,
492 return do_lookup (resource, path, lookup_flags, size, flags, NULL, NULL, error);
496 * g_resource_enumerate_children:
497 * @resource: A #GResource.
498 * @path: A pathname inside the resource.
499 * @lookup_flags: A #GResourceLookupFlags.
500 * @error: return location for a #GError, or %NULL.
502 * Returns all the names of children at the specified @path in the resource.
503 * The return result is a %NULL terminated list of strings which should
504 * be released with g_strfreev().
506 * @lookup_flags controls the behaviour of the lookup.
508 * Returns: (array zero-terminated=1) (transfer full): an array of constant strings
513 g_resource_enumerate_children (GResource *resource,
515 GResourceLookupFlags lookup_flags,
520 char *path_with_slash;
524 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
525 _("The resource at '%s' does not exist"),
530 path_len = strlen (path);
531 if (path[path_len-1] != '/')
532 path_with_slash = g_strconcat (path, "/", NULL);
534 path_with_slash = g_strdup (path);
536 children = gvdb_table_list (resource->table, path_with_slash);
537 g_free (path_with_slash);
539 if (children == NULL)
541 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
542 _("The resource at '%s' does not exist"),
550 static GRWLock resources_lock;
551 static GList *registered_resources;
553 /* This is updated atomically, so we can append to it and check for NULL outside the
554 lock, but all other accesses are done under the write lock */
555 static GStaticResource *lazy_register_resources;
558 g_resources_register_unlocked (GResource *resource)
560 registered_resources = g_list_prepend (registered_resources,
561 g_resource_ref (resource));
565 g_resources_unregister_unlocked (GResource *resource)
567 if (g_list_find (registered_resources, resource) == NULL)
569 g_warning ("Tried to remove not registred resource");
573 registered_resources = g_list_remove (registered_resources,
575 g_resource_unref (resource);
580 * g_resources_register:
581 * @resource: A #GResource.
583 * Registers the resource with the process-global set of resources.
584 * Once a resource is registered the files in it can be accessed
585 * with the global resource lookup functions like g_resources_lookup_data().
590 g_resources_register (GResource *resource)
592 g_rw_lock_writer_lock (&resources_lock);
593 g_resources_register_unlocked (resource);
594 g_rw_lock_writer_unlock (&resources_lock);
598 * g_resources_unregister:
599 * @resource: A #GResource.
601 * Unregisters the resource from the process-global set of resources.
606 g_resources_unregister (GResource *resource)
608 g_rw_lock_writer_lock (&resources_lock);
609 g_resources_unregister_unlocked (resource);
610 g_rw_lock_writer_unlock (&resources_lock);
614 * g_resources_open_stream:
615 * @path: A pathname inside the resource.
616 * @lookup_flags: A #GResourceLookupFlags.
617 * @error: return location for a #GError, or %NULL.
619 * Looks for a file at the specified @path in the set of
620 * globally registred resources and returns a #GInputStream
621 * that lets you read the data.
623 * @lookup_flags controls the behaviour of the lookup.
625 * Returns: (transfer full): #GInputStream or %NULL on error.
626 * Free the returned object with g_object_unref().
631 g_resources_open_stream (const char *path,
632 GResourceLookupFlags lookup_flags,
635 GInputStream *res = NULL;
637 GInputStream *stream;
639 register_lazy_static_resources ();
641 g_rw_lock_reader_lock (&resources_lock);
643 for (l = registered_resources; l != NULL; l = l->next)
645 GResource *r = l->data;
646 GError *my_error = NULL;
648 stream = g_resource_open_stream (r, path, lookup_flags, &my_error);
649 if (stream == NULL &&
650 g_error_matches (my_error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND))
652 g_clear_error (&my_error);
657 g_propagate_error (error, my_error);
664 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
665 _("The resource at '%s' does not exist"),
668 g_rw_lock_reader_unlock (&resources_lock);
674 * g_resources_lookup_data:
675 * @path: A pathname inside the resource.
676 * @lookup_flags: A #GResourceLookupFlags.
677 * @error: return location for a #GError, or %NULL.
679 * Looks for a file at the specified @path in the set of
680 * globally registred resources and returns a #GBytes that
681 * lets you directly access the data in memory.
683 * The data is always followed by a zero byte, so you
684 * can safely use the data as a C string. However, that byte
685 * is not included in the size of the GBytes.
687 * For uncompressed resource files this is a pointer directly into
688 * the resource bundle, which is typically in some readonly data section
689 * in the program binary. For compressed files we allocate memory on
690 * the heap and automatically uncompress the data.
692 * @lookup_flags controls the behaviour of the lookup.
694 * Returns: (transfer full): #GBytes or %NULL on error.
695 * Free the returned object with g_bytes_unref().
700 g_resources_lookup_data (const char *path,
701 GResourceLookupFlags lookup_flags,
708 register_lazy_static_resources ();
710 g_rw_lock_reader_lock (&resources_lock);
712 for (l = registered_resources; l != NULL; l = l->next)
714 GResource *r = l->data;
715 GError *my_error = NULL;
717 data = g_resource_lookup_data (r, path, lookup_flags, &my_error);
719 g_error_matches (my_error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND))
721 g_clear_error (&my_error);
726 g_propagate_error (error, my_error);
733 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
734 _("The resource at '%s' does not exist"),
737 g_rw_lock_reader_unlock (&resources_lock);
743 * g_resources_enumerate_children:
744 * @path: A pathname inside the resource.
745 * @lookup_flags: A #GResourceLookupFlags.
746 * @error: return location for a #GError, or %NULL.
748 * Returns all the names of children at the specified @path in the set of
749 * globally registred resources.
750 * The return result is a %NULL terminated list of strings which should
751 * be released with g_strfreev().
753 * @lookup_flags controls the behaviour of the lookup.
755 * Returns: (array zero-terminated=1) (transfer full): an array of constant strings
760 g_resources_enumerate_children (const char *path,
761 GResourceLookupFlags lookup_flags,
764 GHashTable *hash = NULL;
769 register_lazy_static_resources ();
771 g_rw_lock_reader_lock (&resources_lock);
773 for (l = registered_resources; l != NULL; l = l->next)
775 GResource *r = l->data;
777 children = g_resource_enumerate_children (r, path, 0, NULL);
779 if (children != NULL)
782 hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
784 for (i = 0; children[i] != NULL; i++)
785 g_hash_table_insert (hash, children[i], children[i]);
790 g_rw_lock_reader_unlock (&resources_lock);
794 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
795 _("The resource at '%s' does not exist"),
804 n_children = g_hash_table_size (hash);
805 children = g_new (char *, n_children + 1);
808 g_hash_table_iter_init (&iter, hash);
809 while (g_hash_table_iter_next (&iter, (gpointer *)&key, NULL))
810 children[i++] = g_strdup (key);
811 children[i++] = NULL;
813 g_hash_table_destroy (hash);
820 * g_resources_get_info:
821 * @path: A pathname inside the resource.
822 * @lookup_flags: A #GResourceLookupFlags.
823 * @size: (out) (allow-none): a location to place the length of the contents of the file,
824 * or %NULL if the length is not needed
825 * @flags: (out) (allow-none): a location to place the flags about the file,
826 * or %NULL if the length is not needed
827 * @error: return location for a #GError, or %NULL.
829 * Looks for a file at the specified @path in the set of
830 * globally registred resources and if found returns information about it.
832 * @lookup_flags controls the behaviour of the lookup.
834 * Returns: %TRUE if the file was found. %FALSE if there were errors.
839 g_resources_get_info (const char *path,
840 GResourceLookupFlags lookup_flags,
845 gboolean res = FALSE;
849 register_lazy_static_resources ();
851 g_rw_lock_reader_lock (&resources_lock);
853 for (l = registered_resources; l != NULL; l = l->next)
855 GResource *r = l->data;
856 GError *my_error = NULL;
858 r_res = g_resource_get_info (r, path, lookup_flags, size, flags, &my_error);
860 g_error_matches (my_error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND))
862 g_clear_error (&my_error);
867 g_propagate_error (error, my_error);
874 g_set_error (error, G_RESOURCE_ERROR, G_RESOURCE_ERROR_NOT_FOUND,
875 _("The resource at '%s' does not exist"),
878 g_rw_lock_reader_unlock (&resources_lock);
883 /* This code is to handle registration of resources very early, from a constructor.
884 * At that point we'd like to do minimal work, to avoid ordering issues. For instance,
885 * we're not allowed to use g_malloc, as the user need to be able to call g_mem_set_vtable
886 * before the first call to g_malloc.
888 * So, what we do at construction time is that we just register a static structure on
889 * a list of resources that need to be initialized, and then later, when doing any lookups
890 * in the global list of registered resources, or when getting a reference to the
891 * lazily initialized resource we lazily create and register all the GResources on
894 * To avoid having to use locks in the constructor, and having to grab the writer lock
895 * when checking the lazy registering list we update lazy_register_resources in
896 * a lock-less fashion (atomic prepend-only, atomic replace with NULL). However, all
898 * * check if there are any resources to lazily initialize
899 * * Add a static resource to the lazy init list
900 * Do use the full writer lock for protection.
904 register_lazy_static_resources_unlocked ()
906 GStaticResource *list;
909 list = lazy_register_resources;
910 while (!g_atomic_pointer_compare_and_exchange (&lazy_register_resources, list, NULL));
914 GBytes *bytes = g_bytes_new_static (list->data, list->data_len);
915 GResource *resource = g_resource_new_from_data (bytes, NULL);
918 g_resources_register_unlocked (resource);
919 g_atomic_pointer_set (&list->resource, resource);
921 g_bytes_unref (bytes);
928 register_lazy_static_resources ()
930 if (g_atomic_pointer_get (&lazy_register_resources) == NULL)
933 g_rw_lock_writer_lock (&resources_lock);
934 register_lazy_static_resources_unlocked ();
935 g_rw_lock_writer_unlock (&resources_lock);
939 * g_static_resource_init:
940 * @static_resource: pointer to a static #GStaticResource.
942 * Initializes a GResource from static data using a
945 * This is normally used by code generated by
946 * <link linkend="glib-compile-resources">glib-compile-resources</link> and is
947 * not typically used by other code.
952 g_static_resource_init (GStaticResource *static_resource)
958 next = lazy_register_resources;
959 static_resource->next = next;
961 while (!g_atomic_pointer_compare_and_exchange (&lazy_register_resources, next, static_resource));
965 * g_static_resource_fini:
966 * @static_resource: pointer to a static #GStaticResource.
968 * Finalized a GResource initialized by g_static_resource_init ().
970 * This is normally used by code generated by
971 * <link linkend="glib-compile-resources">glib-compile-resources</link> and is
972 * not typically used by other code.
977 g_static_resource_fini (GStaticResource *static_resource)
981 g_rw_lock_writer_lock (&resources_lock);
983 register_lazy_static_resources_unlocked ();
985 resource = g_atomic_pointer_get (&static_resource->resource);
988 g_atomic_pointer_set (&static_resource->resource, NULL);
989 g_resources_unregister_unlocked (resource);
990 g_resource_unref (resource);
993 g_rw_lock_writer_unlock (&resources_lock);
997 * g_static_resource_get_resource:
998 * @static_resource: pointer to a static #GStaticResource.
1000 * Gets the GResource that was registred by a call to g_static_resource_init ().
1002 * This is normally used by code generated by
1003 * <link linkend="glib-compile-resources">glib-compile-resources</link> and is
1004 * not typically used by other code.
1006 * Return value: (transfer none): a #GResource.
1011 g_static_resource_get_resource (GStaticResource *static_resource)
1013 register_lazy_static_resources ();
1015 return g_atomic_pointer_get (&static_resource->resource);