nptl: Add pthread_clockjoin_np

Introduce pthread_clockjoin_np as a version of pthread_timedjoin_np that
accepts a clockid_t parameter to indicate which clock the timeout should be
measured against. This mirrors the recently-added POSIX-proposed "clock"
wait functions.

Checked on x86_64-linux-gnu.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/nptl/Versions b/nptl/Versions
index be7e810875..adbd4fa589 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -277,6 +277,10 @@ libpthread {
     pthread_mutex_clocklock;
   }
 
+  GLIBC_2.31 {
+    pthread_clockjoin_np;
+  }
+
   GLIBC_PRIVATE {
     __pthread_initialize_minimal;
     __pthread_clock_gettime; __pthread_clock_settime;