[glib] Add a test for GCond

[Matthias Clasen <matthiasc src gnome org>]

commit e1f68c129233f79b244692f35d4bba4792c0e4ad
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 23 23:38:26 2011 -0400

    Add a test for GCond

 glib/tests/cond.c |  134 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 134 insertions(+), 0 deletions(-)
---
diff --git a/glib/tests/cond.c b/glib/tests/cond.c
new file mode 100644
index 0000000..32cbcb3
--- /dev/null
+++ b/glib/tests/cond.c
@@ -0,0 +1,134 @@
+/* Unit tests for GCond
+ * Copyright (C) 2011 Red Hat, Inc
+ * Author: Matthias Clasen
+ *
+ * This work is provided "as is"; redistribution and modification
+ * in whole or in part, in any medium, physical or electronic is
+ * permitted without restriction.
+ *
+ * This work is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * In no event shall the authors or contributors be liable for any
+ * direct, indirect, incidental, special, exemplary, or consequential
+ * damages (including, but not limited to, procurement of substitute
+ * goods or services; loss of use, data, or profits; or business
+ * interruption) however caused and on any theory of liability, whether
+ * in contract, strict liability, or tort (including negligence or
+ * otherwise) arising in any way out of the use of this software, even
+ * if advised of the possibility of such damage.
+ */
+
+#include <glib.h>
+
+static GCond cond = G_COND_INIT;
+static GMutex mutex = G_MUTEX_INIT;
+static volatile gint next;
+
+static void
+push_value (gint value)
+{
+  g_mutex_lock (&mutex);
+  next = value;
+  if (g_test_verbose ())
+    g_print ("Thread %p producing next value: %d\n", g_thread_self (), value);
+  if (value % 10 == 0)
+    g_cond_broadcast (&cond);
+  else
+    g_cond_signal (&cond);
+  g_mutex_unlock (&mutex);
+}
+
+static gint
+pop_value (void)
+{
+  gint value;
+
+  g_mutex_lock (&mutex);
+  while (next == 0)
+    {
+      if (g_test_verbose ())
+        g_print ("Thread %p waiting for cond\n", g_thread_self ());
+      g_cond_wait (&cond, &mutex);
+    }
+  value = next;
+  next = 0;
+  if (g_test_verbose ())
+    g_print ("Thread %p consuming value %d\n", g_thread_self (), value);
+  g_mutex_unlock (&mutex);
+
+  return value;
+}
+
+static gpointer
+produce_values (gpointer data)
+{
+  gint total;
+  gint i;
+
+  for (i = 1; i < 100; i++)
+    {
+      total += i;
+      push_value (i);
+      g_usleep (1000);
+    }
+
+  push_value (-1);
+  g_usleep (1000);
+  push_value (-1);
+
+  if (g_test_verbose ())
+    g_print ("Thread %p produced %d altogether\n", g_thread_self (), total);
+
+  return GINT_TO_POINTER (total);
+}
+
+static gpointer
+consume_values (gpointer data)
+{
+  gint accum = 0;
+  gint value;
+
+  while (TRUE)
+    {
+      value = pop_value ();
+      if (value == -1)
+        break;
+
+      accum += value;
+    }
+
+  if (g_test_verbose ())
+    g_print ("Thread %p accumulated %d\n", g_thread_self (), accum);
+
+  return GINT_TO_POINTER (accum);
+}
+
+static GThread *producer, *consumer1, *consumer2;
+
+static void
+test_cond1 (void)
+{
+  gint total, acc1, acc2;
+
+  producer = g_thread_create (produce_values, NULL, TRUE, NULL);
+  consumer1 = g_thread_create (consume_values, NULL, TRUE, NULL);
+  consumer2 = g_thread_create (consume_values, NULL, TRUE, NULL);
+
+  total = GPOINTER_TO_INT (g_thread_join (producer));
+  acc1 = GPOINTER_TO_INT (g_thread_join (consumer1));
+  acc2 = GPOINTER_TO_INT (g_thread_join (consumer2));
+
+  g_assert_cmpint (total, ==, acc1 + acc2);
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_add_func ("/thread/cond1", test_cond1);
+
+  return g_test_run ();
+}