rewrite the device subsystem interfaces (#48)

[lunaix-os.git] / lunaix-os / kernel / changeling.c

diff --git a/lunaix-os/kernel/changeling.c b/lunaix-os/kernel/changeling.c
new file mode 100644 (file)
index 0000000..ff81597
--- /dev/null
+++ b/lunaix-os/kernel/changeling.c
@@ -0,0 +1,79 @@
+#include <lunaix/changeling.h>
+#include <lunaix/mm/valloc.h>
+
+#include <klibc/string.h>
+
+static DEFINE_LLIST(chrysallidis);
+static unsigned int current_id = 0;
+
+void
+changeling_init(morph_t* parent, morph_t* chlg, 
+                unsigned int id, const char* name)
+{
+    chlg->sig     = CHLG_ID;
+    chlg->ident   = id;
+    chlg->ref     = 1;
+    chlg->uid     = current_id++;
+    
+    changeling_setname(chlg, name);
+
+    if (!parent) {
+        llist_append(&chrysallidis, &chlg->sibs);
+    } else {
+        llist_append(&parent->subs, &chlg->sibs);
+    }
+
+    llist_init_head(&chlg->subs);
+}
+
+morph_t*
+changeling_spawn(morph_t* parent, const char *name)
+{
+    morph_t* changeling;
+
+    changeling = valloc(sizeof(morph_t));
+    changeling_init(parent, changeling, chlg_anon, name);
+    
+    return changeling;
+}
+
+morph_t*
+changeling_find(morph_t* parent, struct hstr* str)
+{
+    morph_t *p, *n;
+    llist_for_each(p, n, &parent->subs, sibs)
+    {
+        if (HSTR_EQ(&p->name, str)) {
+            return p;
+        }
+    }
+
+    return NULL;
+}
+
+morph_t*
+changeling_get_at(morph_t* parent, int index)
+{
+    morph_t *p, *n;
+    llist_for_each(p, n, &parent->subs, sibs)
+    {
+        if (!(index--)) {
+            return p;
+        }
+    }
+
+    return NULL;
+}
+
+morph_t*
+changeling_setname(morph_t* chlg, const char* name)
+{
+    if (name) {
+        chlg->name = HSTR(name, strlen(name));
+        hstr_rehash(&chlg->name, HSTR_FULL_HASH);
+    } else {
+        chlg->name = HHSTR(NULL, 0, 0);
+    }
+
+    return chlg;
+}
\ No newline at end of file