1 files changed, 78 insertions, 0 deletions
diff --git a/src/vppinfra/test_interrupt.c b/src/vppinfra/test_interrupt.c
new file mode 100644
index 00000000000..133692d1bd0
--- /dev/null
+++ b/src/vppinfra/test_interrupt.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2021 Graphiant, Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vppinfra/clib.h>
+#include <vppinfra/format.h>
+#include <vppinfra/error.h>
+#include <vppinfra/random.h>
+#include <vppinfra/time.h>
+#include <vppinfra/interrupt.h>
+
+#define MAX_INTS 2048
+
+int debug = 0;
+
+#define debug(format, args...)                                                \
+  if (debug)                                                                  \
+    {                                                                         \
+      fformat (stdout, format, ##args);                                       \
+    }
+
+void
+set_and_check_bits (void *interrupts, int num_ints)
+{
+  for (int step = 1; step < num_ints; step++)
+    {
+      int int_num = -1;
+      int expected = 0;
+
+      debug ("  Step of %d\n", step);
+      for (int i = 0; i < num_ints; i += step)
+	{
+	  debug ("    Setting %d\n", i);
+	  clib_interrupt_set (interrupts, i);
+	}
+
+      while ((int_num =
+		clib_interrupt_get_next_and_clear (interrupts, int_num)) != -1)
+	{
+	  debug ("    Got %d, expecting %d\n", int_num, expected);
+	  ASSERT (int_num == expected);
+	  expected += step;
+	}
+      int_num = clib_interrupt_get_next_and_clear (interrupts, -1);
+      ASSERT (int_num == -1);
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  clib_mem_init (0, 3ULL << 30);
+
+  debug = (argc > 1);
+
+  void *interrupts = NULL;
+
+  for (int num_ints = 0; num_ints < MAX_INTS; num_ints++)
+    {
+      clib_interrupt_resize (&interrupts, num_ints);
+      debug ("Size now %d\n", num_ints);
+
+      set_and_check_bits (interrupts, num_ints);
+    }
+
+  return 0;
+}