Add pthread_mutex tests

winsup/testsuite/winsup.api/pthread/mutex4.c

@@ -0,0 +1,67 @@
+/* 
+ * mutex4.c
+ *
+ * Thread A locks mutex - thread B tries to unlock.
+ *
+ * Depends on API functions: 
+ *	pthread_mutex_lock()
+ *	pthread_mutex_trylock()
+ *	pthread_mutex_unlock()
+ */
+
+#include "test.h"
+
+static int wasHere = 0;
+
+static pthread_mutex_t mutex1;
+ 
+void * unlocker(void * arg)
+{
+  int expectedResult = (int) arg;
+
+  wasHere++;
+  assert(pthread_mutex_unlock(&mutex1) == expectedResult);
+  wasHere++;
+  return NULL;
+}
+ 
+int
+main()
+{
+  pthread_t t;
+  pthread_mutexattr_t ma;
+
+  assert(pthread_mutexattr_init(&ma) == 0);
+
+  wasHere = 0;
+  assert(pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_DEFAULT) == 0);
+  assert(pthread_mutex_init(&mutex1, &ma) == 0);
+  assert(pthread_mutex_lock(&mutex1) == 0);
+  assert(pthread_create(&t, NULL, unlocker, (void *) EPERM) == 0);
+  assert(pthread_join(t, NULL) == 0);
+  assert(pthread_mutex_unlock(&mutex1) == 0);
+  assert(pthread_mutex_destroy(&mutex1) == 0);
+  assert(wasHere == 2);
+
+  wasHere = 0;
+  assert(pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_ERRORCHECK) == 0);
+  assert(pthread_mutex_init(&mutex1, &ma) == 0);
+  assert(pthread_mutex_lock(&mutex1) == 0);
+  assert(pthread_create(&t, NULL, unlocker, (void *) EPERM) == 0);
+  assert(pthread_join(t, NULL) == 0);
+  assert(pthread_mutex_unlock(&mutex1) == 0);
+  assert(pthread_mutex_destroy(&mutex1) == 0);
+  assert(wasHere == 2);
+
+  wasHere = 0;
+  assert(pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_RECURSIVE) == 0);
+  assert(pthread_mutex_init(&mutex1, &ma) == 0);
+  assert(pthread_mutex_lock(&mutex1) == 0);
+  assert(pthread_create(&t, NULL, unlocker, (void *) EPERM) == 0);
+  assert(pthread_join(t, NULL) == 0);
+  assert(pthread_mutex_unlock(&mutex1) == 0);
+  assert(pthread_mutex_destroy(&mutex1) == 0);
+  assert(wasHere == 2);
+
+  return 0;
+}