1 files changed, 62 insertions, 0 deletions
diff --git a/tests/count1.c b/tests/count1.c
new file mode 100644
index 0000000..c4e0c4e
--- /dev/null
+++ b/tests/count1.c
@@ -0,0 +1,62 @@
+/*
+ * count1.c
+ *
+ * Written by Ben Elliston <bje@cygnus.com>.
+ *
+ * Description:
+ * Test some basic assertions about the number of threads at runtime.
+ */
+
+#include <windows.h>
+#include <pthread.h>
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_t threads[10];
+static unsigned numThreads = 1;
+
+void *
+myfunc(void *arg)
+{
+  pthread_mutex_lock(&lock);
+  numThreads++;
+  pthread_mutex_unlock(&lock);
+
+  Sleep(1000);
+  return 0;
+}
+int
+main()
+{
+  int i, result;
+  int maxThreads = sizeof(threads) / sizeof(pthread_t);
+
+  /* Spawn ten threads. Each thread should increment the numThreads
+     variable, sleep for one second, decrement the variable and then
+     exit. The final result of numThreads should be 1 again. */
+  for (i = 0; i < maxThreads; i++)
+    {
+      result = pthread_create(&threads[i], NULL, myfunc, 0);
+      if (result != 0)
+	{
+	  return 1;
+	}
+    }
+  
+  /* Wait for all the threads to exit. */
+  for (i = 0; i < maxThreads; i++)
+    {
+      pthread_join(threads[i], NULL);
+      pthread_mutex_lock(&lock);
+      numThreads--;
+      pthread_mutex_unlock(&lock);
+    }
+
+  /* Check the number of live threads. */
+  if (numThreads != 1)
+    {
+      return 1;
+    }
+  
+  /* Success. */
+  return 0;
+}