obj: remove redundant object functions; move to kernel/ subfolder

kernel/object.c

@@ -0,0 +1,131 @@
+#include <mango/locks.h>
+#include <mango/object.h>
+#include <mango/queue.h>
+
+#define HAS_OP(obj, opname) ((obj)->ob_type->ob_ops.opname)
+
+static struct queue object_types;
+static spin_lock_t object_types_lock = SPIN_LOCK_INIT;
+
+kern_status_t object_bootstrap(void)
+{
+	return KERN_OK;
+}
+
+kern_status_t object_type_register(struct object_type *p)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&object_types_lock, &flags);
+	queue_push_back(&object_types, &p->ob_list);
+	spin_unlock_irqrestore(&object_types_lock, flags);
+
+	p->ob_cache.c_name = p->ob_name;
+	p->ob_cache.c_obj_size = p->ob_size;
+	p->ob_cache.c_page_order = VM_PAGE_16K;
+
+	vm_cache_init(&p->ob_cache);
+	p->ob_flags |= OBJTYPE_INIT;
+
+	return KERN_OK;
+}
+
+kern_status_t object_type_unregister(struct object_type *p)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&object_types_lock, &flags);
+	queue_delete(&object_types, &p->ob_list);
+	spin_unlock_irqrestore(&object_types_lock, flags);
+
+	return KERN_OK;
+}
+
+struct object *object_create(struct object_type *type)
+{
+	if (!(type->ob_flags & OBJTYPE_INIT)) {
+		return NULL;
+	}
+
+	struct vm_cache *cache = &type->ob_cache;
+	void *obj_buf = vm_cache_alloc(cache, 0);
+	if (!obj_buf) {
+		return NULL;
+	}
+
+	memset(obj_buf, 0x00, type->ob_size);
+
+	struct object *obj = (struct object *)((unsigned char *)obj_buf
+	                                       + type->ob_header_offset);
+
+	obj->ob_type = type;
+	obj->ob_lock = SPIN_LOCK_INIT;
+	obj->ob_magic = OBJECT_MAGIC;
+	obj->ob_refcount = 1;
+	obj->ob_handles = 0;
+
+	return obj;
+}
+
+struct object *object_ref(struct object *obj)
+{
+	obj->ob_refcount++;
+	return obj;
+}
+
+void object_deref(struct object *obj)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&obj->ob_lock, &flags);
+
+	if (obj->ob_refcount == 0) {
+		spin_unlock_irqrestore(&obj->ob_lock, flags);
+		return;
+	}
+
+	obj->ob_refcount--;
+
+	if (obj->ob_refcount > 0) {
+		spin_unlock_irqrestore(&obj->ob_lock, flags);
+		return;
+	}
+
+	if (HAS_OP(obj, destroy)) {
+		obj->ob_type->ob_ops.destroy(obj);
+	}
+
+	vm_cache_free(&obj->ob_type->ob_cache, obj);
+}
+
+void object_lock(struct object *obj)
+{
+	spin_lock(&obj->ob_lock);
+}
+
+void object_unlock(struct object *obj)
+{
+	spin_unlock(&obj->ob_lock);
+}
+
+void object_lock_irqsave(struct object *obj, unsigned long *flags)
+{
+	spin_lock_irqsave(&obj->ob_lock, flags);
+}
+
+void object_unlock_irqrestore(struct object *obj, unsigned long flags)
+{
+	spin_unlock_irqrestore(&obj->ob_lock, flags);
+}
+
+void *object_data(struct object *obj)
+{
+	return (char *)obj + sizeof *obj;
+}
+
+struct object *object_header(void *p)
+{
+	struct object *obj = (struct object *)((char *)p - sizeof *obj);
+	if (obj->ob_magic != OBJECT_MAGIC) {
+		return NULL;
+	}
+
+	return obj;
+}