Add event system

1 files changed, 35 insertions, 0 deletions

diff --git a/src/event.h b/src/event.h
new file mode 100644
index 0000000..41965e9
--- /dev/null
+++ b/src/event.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef INC_EVENT_H
+#define INC_EVENT_H
+
+#define _EVENT_CAT4_(a, b, c, d) a##b##c##d
+#define _EVENT_CAT4(a, b, c, d) _EVENT_CAT4_(a, b, c, d)
+
+#define DECL_EVENT(evname) void _evemit_##evname(void);
+#define DEF_EVENT(evname) \
+	DECL_EVENT(evname) \
+	static inline void _evown_##evname(void) { _evemit_##evname(); }
+#define EMIT_EVENT(evname) _evown_##evname();
+
+#define HANDLE_EVENT(evname) \
+	void _EVENT_CAT4(_evhandler_, MODULE_NAME, _, evname)(void) \
+	/* function body here */
+
+#endif
+
+// vi: sw=4 ts=4 noet tw=80 cc=80