[RFC PATCH glibc 12/13] support: implement xpthread key create/delete (v3)

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

Expose xpthread_key_create () and xpthread_key_delete () wrappers
for tests.

	* support/Makefile: Add xpthread_key_create and xpthread_key_delete.
	* support/xthread.h: Add prototype for xpthread_key_create and
	xpthread_key_delete.
	* support/xpthread_key_create.c: New file.
	* support/xpthread_key_delete.c: New file.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Carlos O'Donell <carlos@redhat.com>
CC: Florian Weimer <fweimer@redhat.com>
CC: Joseph Myers <joseph@codesourcery.com>
CC: Szabolcs Nagy <szabolcs.nagy@arm.com>
CC: libc-alpha@sourceware.org
---
Changes since v1:
- Update ChangeLog.
- Wrap long line in xpthread_key_create.

Changes since v2:
- Rebase on glibc 2.30.
---
 support/Makefile              |  2 ++
 support/xpthread_key_create.c | 25 +++++++++++++++++++++++++
 support/xpthread_key_delete.c | 24 ++++++++++++++++++++++++
 support/xthread.h             |  2 ++
 4 files changed, 53 insertions(+)
 create mode 100644 support/xpthread_key_create.c
 create mode 100644 support/xpthread_key_delete.c

diff --git a/support/Makefile b/support/Makefile
index 23c6d74627..affc598c65 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -127,6 +127,8 @@ libsupport-routines = \
   xpthread_create \
   xpthread_detach \
   xpthread_join \
+  xpthread_key_create \
+  xpthread_key_delete \
   xpthread_mutex_consistent \
   xpthread_mutex_destroy \
   xpthread_mutex_init \
diff --git a/support/xpthread_key_create.c b/support/xpthread_key_create.c
new file mode 100644
index 0000000000..fb5a89ab3a
--- /dev/null
+++ b/support/xpthread_key_create.c
@@ -0,0 +1,25 @@
+/* pthread_key_create with error checking.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+
+   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 <support/xthread.h>
+
+void
+xpthread_key_create (pthread_key_t *key, void (*destr_function) (void *))
+{
+  xpthread_check_return ("pthread_key_create",
+                         pthread_key_create (key, destr_function));
+}
diff --git a/support/xpthread_key_delete.c b/support/xpthread_key_delete.c
new file mode 100644
index 0000000000..423ff4584d
--- /dev/null
+++ b/support/xpthread_key_delete.c
@@ -0,0 +1,24 @@
+/* pthread_key_delete with error checking.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+
+   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 <support/xthread.h>
+
+void
+xpthread_key_delete (pthread_key_t key)
+{
+  xpthread_check_return ("pthread_key_delete", pthread_key_delete (key));
+}
diff --git a/support/xthread.h b/support/xthread.h
index f39720cb23..4be86b39a0 100644
--- a/support/xthread.h
+++ b/support/xthread.h
@@ -95,6 +95,8 @@ void xpthread_rwlock_wrlock (pthread_rwlock_t *rwlock);
 void xpthread_rwlock_rdlock (pthread_rwlock_t *rwlock);
 void xpthread_rwlock_unlock (pthread_rwlock_t *rwlock);
 void xpthread_rwlock_destroy (pthread_rwlock_t *rwlock);
+void xpthread_key_create (pthread_key_t *key, void (*destr_function) (void *));
+void xpthread_key_delete (pthread_key_t key);
 
 __END_DECLS
 
-- 
2.17.1