Tidy up ringbuf and make tests

test/test_ringbuf.c

@@ -0,0 +1,48 @@
+#include <check.h>
+#include <unistd.h>
+#include "ucore/ringbuf.h"
+
+START_TEST (test_ringbuf)
+{
+
+    UCRingBuf rb;
+    int rc;
+    int pgsize = getpagesize();
+    rc = uc_ringbuf_init(&rb, pgsize);
+    ck_assert_int_eq(rc, 0);
+    ck_assert_int_eq(uc_ringbuf_available(&rb), pgsize);
+
+
+    for (int i = 0 ; i < pgsize; i++) {
+        unsigned char data = i % 256;
+        rc = uc_ringbuf_write(&rb, &data, 1);
+        ck_assert_int_eq(rc, 0);
+
+    }
+    ck_assert_int_eq(uc_ringbuf_available(&rb), 0);
+
+
+    for (int i = 0; i < pgsize; i++) {
+        unsigned char data = 0;
+        rc = uc_ringbuf_read(&rb, &data, 1);
+        ck_assert_int_eq(rc, 0);
+        ck_assert_int_eq(data, i % 256);
+    }
+    ck_assert_int_eq(uc_ringbuf_available(&rb), pgsize);
+
+}
+
+Suite *ringbuf_suite(void)
+{
+    Suite *s = suite_create("ringbuf");
+    TCase *tc1 = tcase_create("ringbuf");
+
+    tcase_add_test(tc1, test_ringbuf);
+#ifndef __APPLE__
+#endif
+
+    suite_add_tcase(s, tc1);
+
+    return s;
+}
+