tests: enhance msg_avail

- rename `thread_msg_avail` to `msg_avail`, does not require threads
    - minor code enhancements and corrections

tests/msg_avail/Makefile

@@ -1,4 +1,4 @@
-APPLICATION = thread_msg_avail
+APPLICATION = msg_avail
 include ../Makefile.tests_common
 
 DISABLE_MODULE += auto_init

tests/msg_avail/main.c

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 Nick van IJzendoorn <nijzendoorn@engineering-spirit.nl>
+ *               2017 HAW Hamburg
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -14,6 +15,7 @@
  * @brief Thread test application
  *
  * @author Nick van IJzendoorn <nijzendoorn@engineering-spirit.nl>
+ * @author Sebastian Meiling <s@mlng.net>
  *
  * @}
  */
@@ -21,7 +23,7 @@
 #include <stdio.h>
 #include <inttypes.h>
 
-#include "thread.h"
+#include "log.h"
 #include "msg.h"
 
 #define MSG_QUEUE_LENGTH                (8)
@@ -34,28 +36,27 @@ int main(void)
 
     msg_init_queue(msg_queue, MSG_QUEUE_LENGTH);
 
+    puts("[START]");
+    /* add message to own queue */
     for (int idx = 0; idx < MSG_QUEUE_LENGTH; ++idx) {
-        msges[idx].sender_pid = thread_getpid();
         msges[idx].type = idx;
-
         msg_send_to_self(msges + idx);
-
-        printf("Add message %d\n", idx);
-
-        while (msg_avail() != (idx) + 1)
-            ; /* spin forever if we don't have the result we expect */
+        LOG_INFO("+ add msg: %d\n", idx);
+        if (msg_avail() != (idx) + 1) {
+            puts("[FAILED]");
+            return 1;
+        }
     }
-
+    /* receive available messages in queue */
     for (int idx = msg_avail(); idx > 0; --idx) {
         msg_t msg;
         msg_receive(&msg);
-
-        printf("Receive message: %d\n", (MSG_QUEUE_LENGTH - idx));
-
-        while (msg.type != (MSG_QUEUE_LENGTH - idx) || msg_avail() != idx - 1)
-            ; /* spin forever if we don't have the result we expect */
+        LOG_INFO("- got msg: %d\n", (MSG_QUEUE_LENGTH - idx));
+        if (msg.type != (MSG_QUEUE_LENGTH - idx) || msg_avail() != idx - 1) {
+            puts("[FAILED]");
+            return 1;
+        }
     }
-
-    puts("TEST PASSED\n");
+    puts("[SUCCESS]");
     return 0;
 }