[Qemu-devel] [PATCH 1/4] kbd leds: infrastructure

[Gerd Hoffmann <kraxel@redhat.com>]

Adds infrastructure for keyboard led status tracking to qemu.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 console.h |   14 ++++++++++++++
 input.c   |   50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/console.h b/console.h
index 916859d..0e969d1 100644
--- a/console.h
+++ b/console.h
@@ -10,10 +10,15 @@
 #define MOUSE_EVENT_RBUTTON 0x02
 #define MOUSE_EVENT_MBUTTON 0x04
 
+#define QEMU_SCROLL_LOCK_LED (1 << 0)
+#define QEMU_NUM_LOCK_LED    (1 << 1)
+#define QEMU_CAPS_LOCK_LED   (1 << 2)
+
 /* in ms */
 #define GUI_REFRESH_INTERVAL 30
 
 typedef void QEMUPutKBDEvent(void *opaque, int keycode);
+typedef void QEMUPutLEDEvent(void *opaque, int ledstate);
 typedef void QEMUPutMouseEvent(void *opaque, int dx, int dy, int dz, int buttons_state);
 
 typedef struct QEMUPutMouseEntry {
@@ -26,13 +31,22 @@ typedef struct QEMUPutMouseEntry {
     struct QEMUPutMouseEntry *next;
 } QEMUPutMouseEntry;
 
+typedef struct QEMUPutLEDEntry {
+    QEMUPutLEDEvent *put_led;
+    void *opaque;
+    struct QEMUPutLEDEntry *next;
+} QEMUPutLEDEntry;
+
 void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque);
 QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
                                                 void *opaque, int absolute,
                                                 const char *name);
 void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry);
+QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func, void *opaque);
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry);
 
 void kbd_put_keycode(int keycode);
+void kbd_put_ledstate(int ledstate);
 void kbd_mouse_event(int dx, int dy, int dz, int buttons_state);
 int kbd_mouse_is_absolute(void);
 
diff --git a/input.c b/input.c
index 955b9ab..82bc85c 100644
--- a/input.c
+++ b/input.c
@@ -31,6 +31,7 @@
 
 static QEMUPutKBDEvent *qemu_put_kbd_event;
 static void *qemu_put_kbd_event_opaque;
+static QEMUPutLEDEntry *qemu_put_led_event_head;
 static QEMUPutMouseEntry *qemu_put_mouse_event_head;
 static QEMUPutMouseEntry *qemu_put_mouse_event_current;
 
@@ -102,6 +103,44 @@ void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry)
     qemu_free(entry);
 }
 
+QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func,
+                                            void *opaque)
+{
+    QEMUPutLEDEntry *s;
+
+    s = qemu_mallocz(sizeof(QEMUPutLEDEntry));
+
+    s->put_led = func;
+    s->opaque = opaque;
+    s->next = qemu_put_led_event_head;
+    qemu_put_led_event_head = s;
+    return s;
+}
+
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry)
+{
+    QEMUPutLEDEntry *prev = NULL, *cursor;
+
+    if (!qemu_put_led_event_head || entry == NULL)
+        return;
+
+    cursor = qemu_put_led_event_head;
+    while (cursor != NULL && cursor != entry) {
+        prev = cursor;
+        cursor = cursor->next;
+    }
+
+    if (cursor == NULL) // does not exist or list empty
+        return;
+
+    if (prev == NULL) { // entry is head
+        qemu_put_led_event_head = cursor->next;
+    } else {
+        prev->next = entry->next;
+    }
+    qemu_free(entry);
+}
+
 void kbd_put_keycode(int keycode)
 {
     if (qemu_put_kbd_event) {
@@ -109,6 +148,17 @@ void kbd_put_keycode(int keycode)
     }
 }
 
+void kbd_put_ledstate(int ledstate)
+{
+    QEMUPutLEDEntry *cursor;
+
+    cursor = qemu_put_led_event_head;
+    while (cursor != NULL) {
+        cursor->put_led(cursor->opaque, ledstate);
+        cursor = cursor->next;
+    }
+}
+
 void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
 {
     QEMUPutMouseEvent *mouse_event;
-- 
1.6.6