Thread barrier implementation

This commit introduces dynamic_barrier_t. Its a thread barrier that counts joins but allows callback to be specified later. See std::barrier for a basic barrier description.
2024-11-27 18:14:59 +01:00
parent 03946cd47b
commit ea0ea2ff8f
6 changed files with 249 additions and 0 deletions
@@ -0,0 +1,118 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <threads.h>
+#include <stdlib.h>
+#include <gtest/gtest.h>
+
+extern "C" {
+#include "barrier.h"
+void exit_function(const char *file, const char *function, const int line, const char *s, const int assert)
+{
+  if (assert) {
+    abort();
+  } else {
+    exit(EXIT_SUCCESS);
+  }
+}
+}
+
+static int trigger_count = 0;
+static int triggered = 0;
+void f(void *arg)
+{
+  triggered = 1;
+  trigger_count++;
+}
+
+TEST(dynamic_barrier, trigger_once)
+{
+  dynamic_barrier_t barrier;
+  triggered = 0;
+  dynamic_barrier_init(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_update(&barrier, 4, f, NULL);
+  EXPECT_EQ(triggered, 1);
+}
+
+TEST(dynamic_barrier, trigger_twice)
+{
+  dynamic_barrier_t barrier;
+  triggered = 0;
+  dynamic_barrier_init(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_update(&barrier, 4, f, NULL);
+  EXPECT_EQ(triggered, 1);
+  triggered = 0;
+  dynamic_barrier_init(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_join(&barrier);
+  dynamic_barrier_update(&barrier, 4, f, NULL);
+  EXPECT_EQ(triggered, 1);
+}
+
+int dynamic_barrier_thread(void *thr_data)
+{
+  dynamic_barrier_t *barrier = (dynamic_barrier_t *)thr_data;
+  dynamic_barrier_join(barrier);
+  return 0;
+}
+
+int dynamic_barrier_update_thread(void *thr_data)
+{
+  dynamic_barrier_t *barrier = (dynamic_barrier_t *)thr_data;
+  dynamic_barrier_update(barrier, 3, f, NULL);
+  return 0;
+}
+
+TEST(dynamic_barrier, multithreaded)
+{
+  thrd_t thr[3];
+  dynamic_barrier_t barrier;
+  trigger_count = 0;
+  for (int i = 0; i < 300; i++) {
+    dynamic_barrier_init(&barrier);
+    thrd_t update_thread;
+    thrd_create(&update_thread, dynamic_barrier_update_thread, &barrier);
+    for (int n = 0; n < 3; ++n)
+      thrd_create(&thr[n], dynamic_barrier_thread, &barrier);
+    for (int n = 0; n < 3; ++n)
+      thrd_join(thr[n], NULL);
+    thrd_join(update_thread, NULL);
+  }
+  assert(trigger_count == 300);
+}
+
+int main(int argc, char **argv)
+{
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}