Add pthread_mutex tests

winsup/testsuite/winsup.api/pthread/mutex7.c

@@ -0,0 +1,50 @@
+/* 
+ * mutex7.c
+ *
+ * Test the default (type not set) mutex type.
+ * Should be the same as PTHREAD_MUTEX_ERRORCHECK.
+ * Thread locks then trylocks mutex (attempted recursive lock).
+ * The thread should lock first time and EBUSY second time.
+ *
+ * Depends on API functions: 
+ *	pthread_mutex_lock()
+ *	pthread_mutex_trylock()
+ *	pthread_mutex_unlock()
+ */
+
+#include "test.h"
+
+static int lockCount = 0;
+
+static pthread_mutex_t mutex;
+
+void * locker(void * arg)
+{
+  assert(pthread_mutex_lock(&mutex) == 0);
+  lockCount++;
+  assert(pthread_mutex_trylock(&mutex) == EBUSY);
+  lockCount++;
+  assert(pthread_mutex_unlock(&mutex) == 0);
+  assert(pthread_mutex_unlock(&mutex) == EPERM);
+
+  return 0;
+}
+ 
+int
+main()
+{
+  pthread_t t;
+
+  assert(pthread_mutex_init(&mutex, NULL) == 0);
+
+  assert(pthread_create(&t, NULL, locker, NULL) == 0);
+
+  Sleep(1000);
+
+  assert(lockCount == 2);
+
+  exit(0);
+
+  /* Never reached */
+  return 0;
+}