compositor: add plugin-registry
Implement a simple register and lookup for function tables. This is
intended for plugins to expose APIs to other plugins.
It has been very hard to arrange a plugin to be able to call into
another plugin without modifying Weston core to explicitly support each
case. This patch fixes that.
The tests all pass.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Giulio Camuffo <giuliocamuffo@gmail.com>
diff --git a/libweston/plugin-registry.h b/libweston/plugin-registry.h
new file mode 100644
index 0000000..3f5618d
--- /dev/null
+++ b/libweston/plugin-registry.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 DENSO CORPORATION
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef WESTON_PLUGIN_REGISTRY_H
+#define WESTON_PLUGIN_REGISTRY_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct weston_compositor;
+
+int
+weston_plugin_api_register(struct weston_compositor *compositor,
+ const char *api_name,
+ const void *vtable,
+ size_t vtable_size);
+
+const void *
+weston_plugin_api_get(struct weston_compositor *compositor,
+ const char *api_name,
+ size_t vtable_size);
+
+void
+weston_plugin_api_destroy_list(struct weston_compositor *compositor);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* WESTON_PLUGIN_REGISTRY_H */