From d996f88bfda890df5d2b76e7c06cae329e04ab00 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sun, 1 May 2022 20:09:52 +0200
Subject: kernel/proc: make handles separate refcounted objects

---
 src/kernel/handle.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/kernel/handle.c

(limited to 'src/kernel/handle.c')

diff --git a/src/kernel/handle.c b/src/kernel/handle.c
new file mode 100644
index 0000000..d7f19b3
--- /dev/null
+++ b/src/kernel/handle.c
@@ -0,0 +1,27 @@
+#include <kernel/handle.h>
+#include <kernel/mem/alloc.h>
+#include <kernel/panic.h>
+#include <kernel/proc.h>
+
+struct handle *handle_init(enum handle_type type) {
+	struct handle *h = kmalloc(sizeof *h);
+	h->type = type;
+	h->refcount = 1;
+	return h;
+}
+
+void handle_close(struct handle *h) {
+	if (!h) return;
+	assert(h->refcount > 0);
+	if (--(h->refcount) == 0) {
+		// TODO call close() in handler
+		// TODO count allocations and frees
+
+		// TODO sanity check to check if refcount is true. handle_sanity?
+
+		// TODO tests which would catch premature frees
+		// by that i mean duplicating a handle and killing the original process
+		h->type = HANDLE_INVALID;
+		kfree(h);
+	}
+}
-- 
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