[LTP] [PATCHv3]pthread_once/1-1.c : add error checks

[DAN LI <li.dan@cn.fujitsu.com>]

Add error checks to:

  Make sure this case not slip into one situation that
  the first pthread_once fails, and the second successes,
  then the case passes with bypassing its assertion.

  Give more detailed and exact execute result.


Signed-off-by: DAN LI <li.dan@cn.fujitsu.com>
---
 .../conformance/interfaces/pthread_once/1-1.c           | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
index 3a7c861..3392e6b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
@@ -26,7 +26,7 @@
 #include "posixtest.h"

 /* Keeps track of how many times the init function has been called. */
-int init_flag;
+static int init_flag;

 /* The init function that pthread_once calls */
 void *an_init_func()
@@ -37,16 +37,25 @@ void *an_init_func()

 int main()
 {
+	int ret;
+
 	pthread_once_t once_control = PTHREAD_ONCE_INIT;

 	init_flag = 0;

 	/* Call pthread_once, passing it the once_control */
-	pthread_once(&once_control, (void *)an_init_func);
-
+	ret = pthread_once(&once_control, (void *)an_init_func);
+	if (ret != 0) {
+		printf("pthread_once failed\n");
+		return PTS_UNRESOLVED;
+	}
 	/* Call pthread_once again. The init function should not be
 	 * called. */
-	pthread_once(&once_control, (void *)an_init_func);
+	ret = pthread_once(&once_control, (void *)an_init_func);
+	if (ret != 0) {
+		printf("pthread_once failed\n");
+		return PTS_UNRESOLVED;
+	}

 	if (init_flag != 1) {
 		printf("Test FAILED\n");
-- 
1.7.12

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