1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/htl/pt-cond-signal.c b/sysdeps/htl/pt-cond-signal.c
new file mode 100644
index 0000000000..3fae03d33b
--- /dev/null
+++ b/sysdeps/htl/pt-cond-signal.c
@@ -0,0 +1,42 @@
+/* Signal a condition.  Generic version.
+   Copyright (C) 2000-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library;  if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+
+#include <pt-internal.h>
+
+/* Unblock at least one of the threads that are blocked on condition
+   variable COND.  */
+int
+__pthread_cond_signal (pthread_cond_t *cond)
+{
+  struct __pthread *wakeup;
+
+  __pthread_spin_lock (&cond->__lock);
+  wakeup = cond->__queue;
+  if (wakeup != NULL)
+    __pthread_dequeue (wakeup);
+  __pthread_spin_unlock (&cond->__lock);
+
+  if (wakeup != NULL)
+    __pthread_wakeup (wakeup);
+
+  return 0;
+}
+
+strong_alias (__pthread_cond_signal, pthread_cond_signal);