From ae5fee63f160643a397d18e9e0658275606bc4d4 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Tue, 7 Mar 2023 02:18:26 +0200
Subject: initial commit

---
 src/res.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/res.c

(limited to 'src/res.c')

diff --git a/src/res.c b/src/res.c
new file mode 100644
index 0000000..787f50a
--- /dev/null
+++ b/src/res.c
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+
+/**
+ * @file res.c
+ * Simple resource manager implementation.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <ct/res.h>
+
+/**
+ * Grow resource manager buffer.
+ * Doubles every call.
+ *
+ * @param r Resource manager to expand.
+ */
+static void res_expand(struct res *r)
+{
+	r->max *= 2;
+	r->p = realloc(r->p, r->max * sizeof(void *));
+}
+
+struct res *res_create()
+{
+	struct res *r = malloc(sizeof(struct res));
+	r->n = 0;
+	/* arbitrary number */
+	r->max = 1024;
+	r->p = calloc(1, r->max * sizeof(void *));
+	return r;
+}
+
+void res_add(struct res *r, void *p)
+{
+	if (r->n >= r->max)
+		res_expand(r);
+
+	r->p[r->n++] = p;
+}
+
+void *res_alloc(struct res *r, size_t size)
+{
+	void *p = malloc(size);
+	if (!p)
+		return NULL;
+
+	res_add(r, p);
+	return p;
+}
+
+void res_destroy(struct res *r)
+{
+	for (size_t i = 0; i < r->n; ++i)
+		free(r->p[i]);
+
+	free(r->p);
+	free(r);
+}
-- 
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