likely: new module

[ccan] / ccan / likely / test / run-debug.c

diff --git a/ccan/likely/test/run-debug.c b/ccan/likely/test/run-debug.c
new file mode 100644 (file)
index 0000000..198ac5b
--- /dev/null
+++ b/ccan/likely/test/run-debug.c
@@ -0,0 +1,87 @@
+#define DEBUG 1
+#include <ccan/likely/likely.c>
+#include <ccan/likely/likely.h>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+
+static bool one_seems_likely(unsigned int val)
+{
+       if (likely(val == 1))
+               return true;
+       return false;
+}
+
+static bool one_seems_unlikely(unsigned int val)
+{
+       if (unlikely(val == 1))
+               return true;
+       return false;
+}
+
+static bool likely_one_unlikely_two(unsigned int val1, unsigned int val2)
+{
+       /* Same line, check we don't get confused! */
+       if (likely(val1 == 1) && unlikely(val2 == 2))
+               return true;
+       return false;
+}
+
+int main(int argc, char *argv[])
+{
+       const char *bad;
+
+       plan_tests(13);
+
+       /* Correct guesses. */
+       one_seems_likely(1);
+       ok1(likely_stats(0, 90) == NULL);
+       one_seems_unlikely(2);
+       ok1(likely_stats(0, 90) == NULL);
+
+       /* Incorrect guesses. */
+       one_seems_likely(0);
+       one_seems_likely(2);
+       /* Hasn't been hit 4 times, so this fails */
+       ok1(!likely_stats(4, 90));
+       bad = likely_stats(3, 90);
+       ok(strends(bad, "run-debug.c:9:likely(val == 1) correct 33% (1/3)"),
+          "likely_stats returned %s", bad);
+
+       /* Nothing else above 90% */
+       ok1(!likely_stats(0, 90));
+
+       /* This should get everything. */
+       bad = likely_stats(0, 100);
+       ok(strends(bad, "run-debug.c:16:unlikely(val == 1) correct 100% (1/1)"),
+          "likely_stats returned %s", bad);
+
+       /* Nothing left (table is actually cleared) */
+       ok1(!likely_stats(0, 100));
+
+       /* Make sure unlikely works */
+       one_seems_unlikely(0);
+       one_seems_unlikely(2);
+       one_seems_unlikely(1);
+
+       bad = likely_stats(0, 90);
+       ok(strends(bad, "run-debug.c:16:unlikely(val == 1) correct 66% (2/3)"),
+          "likely_stats returned %s", bad);
+       ok1(!likely_stats(0, 100));
+
+       likely_one_unlikely_two(1, 1);
+       likely_one_unlikely_two(1, 1);
+       likely_one_unlikely_two(1, 1);
+       ok1(!likely_stats(0, 90));
+       likely_one_unlikely_two(1, 2);
+
+       bad = likely_stats(0, 90);
+       ok(strends(bad, "run-debug.c:24:unlikely(val2 == 2) correct 75% (3/4)"),
+          "likely_stats returned %s", bad);
+       bad = likely_stats(0, 100);
+       ok(strends(bad, "run-debug.c:24:likely(val1 == 1) correct 100% (4/4)"),
+          "likely_stats returned %s", bad);
+
+       ok1(!likely_stats(0, 100));
+
+       exit(exit_status());
+}