scanner: emit event wrapper functions for server

Generate typed wrapper functions for sending events in a server.

This allows compile time type checking, unlike the existing method of
calling the variadic function wl_resource_post_event().

The stuff in wayland-server.h had to be slightly reordered to have all
(forward) declarations before use.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

2 files changed, 51 insertions, 8 deletions

diff --git a/src/scanner.c b/src/scanner.c
index 91e2ad2..48eea25 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -560,6 +560,47 @@ emit_stubs(struct wl_list *message_list, struct interface *interface)
 	}
 }
 
+static void
+emit_event_wrappers(struct wl_list *message_list, struct interface *interface)
+{
+	struct message *m;
+	struct arg *a;
+
+	/* We provide hand written functions for the display object */
+	if (strcmp(interface->name, "wl_display") == 0)
+		return;
+
+	wl_list_for_each(m, message_list, link) {
+		printf("static inline void\n"
+		       "%s_send_%s(struct wl_resource *resource_",
+		       interface->name, m->name);
+
+		wl_list_for_each(a, &m->arg_list, link) {
+			printf(", ");
+			switch (a->type) {
+			case NEW_ID:
+			case OBJECT:
+				printf("struct wl_resource *");
+				break;
+			default:
+				emit_type(a);
+			}
+			printf("%s", a->name);
+		}
+
+		printf(")\n"
+		       "{\n"
+		       "\twl_resource_post_event(resource_, %s_%s",
+		       interface->uppercase_name, m->uppercase_name);
+
+		wl_list_for_each(a, &m->arg_list, link)
+			printf(", %s", a->name);
+
+		printf(");\n");
+		printf("}\n\n");
+	}
+}
+
 static const char *indent(int n)
 {
 	const char *whitespace[] = {
@@ -774,6 +815,7 @@ emit_header(struct protocol *protocol, int server)
 		if (server) {
 			emit_structs(&i->request_list, i);
 			emit_opcodes(&i->event_list, i);
+			emit_event_wrappers(&i->event_list, i);
 		} else {
 			emit_structs(&i->event_list, i);
 			emit_opcodes(&i->request_list, i);
diff --git a/src/wayland-server.h b/src/wayland-server.h
index 49ab5b1..38e099e 100644
--- a/src/wayland-server.h
+++ b/src/wayland-server.h
@@ -30,7 +30,6 @@ extern "C" {
 #include <sys/types.h>
 #include <stdint.h>
 #include "wayland-util.h"
-#include "wayland-server-protocol.h"
 
 enum {
 	WL_EVENT_READABLE = 0x01,
@@ -121,6 +120,13 @@ struct wl_resource {
 	void *data;
 };
 
+struct wl_buffer {
+	struct wl_resource resource;
+	int32_t width, height;
+	uint32_t busy_count;
+	void *user_data;
+};
+
 struct wl_shm_callbacks {
 	void (*buffer_created)(struct wl_buffer *buffer);
 
@@ -131,13 +137,6 @@ struct wl_shm_callbacks {
 	void (*buffer_destroyed)(struct wl_buffer *buffer);
 };
 
-struct wl_buffer {
-	struct wl_resource resource;
-	int32_t width, height;
-	uint32_t busy_count;
-	void *user_data;
-};
-
 struct wl_listener {
 	struct wl_list link;
 	void (*func)(struct wl_listener *listener,
@@ -265,6 +264,8 @@ void wl_resource_post_error(struct wl_resource *resource,
 			    uint32_t code, const char *msg, ...);
 void wl_resource_post_no_memory(struct wl_resource *resource);
 
+#include "wayland-server-protocol.h"
+
 void
 wl_display_post_frame(struct wl_display *display, struct wl_surface *surface,
 		      uint32_t msecs);