C11 threads: Fix inaccuracies in testsuite

- tst-mtx-recursive.c: mtx_init fails to use mtx_plain.  Per C11
  specs, using mtx_recursive alone is not supported.  This isn't
  catched because mtx_plain is defined as 0.

- tst-thrd-sleep.c: thrd_sleep returns 0 on success, a negative
  value on failure.  Testing against thrd_success is incorrect.

- tst-tss-basic.c: tss_set is incorrectly checkd for a non-0
  value.  The test should test aginst C11 threads error codes.
  This isn't catched because thrd_success is defined as 0.

Note that all three tests fail on FreeBSD, which defines all mutex type
values, as well as all C11 threads error codes with non-0 values.

1 files changed, 1 insertions, 1 deletions

diff --git a/sysdeps/pthread/tst-tss-basic.c b/sysdeps/pthread/tst-tss-basic.c
index 3b06abc5cf..5a2c1bd1ee 100644
--- a/sysdeps/pthread/tst-tss-basic.c
+++ b/sysdeps/pthread/tst-tss-basic.c
@@ -33,7 +33,7 @@ tss_thrd (void *arg)
   if (tss_create (&key, NULL) != thrd_success)
     FAIL_EXIT1 ("tss_create failed");
 
-  if (tss_set (key, TSS_VALUE))
+  if (tss_set (key, TSS_VALUE) != thrd_success)
     FAIL_EXIT1 ("tss_set failed");
 
   void *value = tss_get (key);