Initial commit

src/lib/idpool.c

@@ -0,0 +1,35 @@
+/*
+ * Used for thread and space ids.
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ */
+#include <l4/lib/printk.h>
+#include <l4/lib/idpool.h>
+#include <l4/generic/kmalloc.h>
+#include INC_GLUE(memory.h)
+
+struct id_pool *id_pool_new_init(int totalbits)
+{
+	int nwords = BITWISE_GETWORD(totalbits);
+	struct id_pool *new = kzalloc((nwords * SZ_WORD)
+				      + sizeof(struct id_pool));
+	new->nwords = nwords;
+	return new;
+}
+
+int id_new(struct id_pool *pool)
+{
+	int id = find_and_set_first_free_bit(pool->bitmap,
+					     pool->nwords * WORD_BITS);
+	BUG_ON(id < 0);
+	return id;
+}
+
+int id_del(struct id_pool *pool, int id)
+{
+	int ret = check_and_clear_bit(pool->bitmap, id);
+
+	BUG_ON(ret < 0);
+	return ret;
+}
+