feat: input device subsystem to resolve race condition on polling input

[lunaix-os.git] / lunaix-os / includes / lunaix / input.h

diff --git a/lunaix-os/includes/lunaix/input.h b/lunaix-os/includes/lunaix/input.h
new file mode 100644 (file)
index 0000000..872ea04
--- /dev/null
+++ b/lunaix-os/includes/lunaix/input.h
@@ -0,0 +1,57 @@
+#ifndef __LUNAIX_INPUT_H
+#define __LUNAIX_INPUT_H
+
+#include <lunaix/clock.h>
+#include <lunaix/device.h>
+#include <lunaix/ds/llist.h>
+#include <lunaix/ds/waitq.h>
+#include <lunaix/types.h>
+
+// event should propagate further
+#define INPUT_EVT_NEXT 0
+// event should be captured here
+#define INPUT_EVT_CATCH 1
+
+// key pressed (key-type device)
+#define PKT_PRESS 0x1
+// key released (key-type device)
+#define PKT_RELEASE 0x2
+// vector (e.g. mice wheel scroll, mice maneuver)
+#define PKT_VECTOR 0x3
+
+struct input_evt_pkt
+{
+    uint32_t pkt_type;  // packet type
+    uint32_t scan_code; // hardware raw code
+    uint32_t sys_code;  // driver translated code
+    time_t timestamp;   // event timestamp
+};
+
+struct input_device
+{
+    struct device* dev_if;            // device interface
+    struct input_evt_pkt current_pkt; // recieved event packet
+    waitq_t readers;                  // reader wait queue
+};
+
+typedef int (*input_evt_cb)(struct input_device* dev);
+
+struct input_evt_chain
+{
+    struct llist_header chain;
+    input_evt_cb evt_cb;
+};
+
+void
+input_init();
+
+void
+input_fire_event(struct input_device* idev, struct input_evt_pkt* pkt);
+
+void
+input_add_listener(input_evt_cb listener);
+
+struct input_device*
+input_add_device(char* name_fmt, ...);
+
+#endif /* __LUNAIX_INPUT_H */