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authorLukasz Majewski <lukma@denx.de>2020-10-29 14:19:25 +0100
committerLukasz Majewski <lukma@denx.de>2020-11-14 22:09:43 +0100
commit1f1a4847a404e26b5f729dc14a92aa94c87a6063 (patch)
tree9616ced3bc636e3f34a5dac8f6a2a8058ee400bd /sysdeps
parent839fa6bc8ab469a1e7dd6be4cf95322aa518fcbc (diff)
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y2038: Convert cnd_timedwait to support 64 bit time
The cnd_timedwait function has been converted to support 64 bit time.
It was also necessary to provide Linux specific copy of it to avoid
problems on i686-gnu (i.e. HURD) port, which is not providing
pthread_cond_timedwait() supporting 64 bit time.

Moreover, a linux specific copy of thrd_priv.h header file has been
added as well.

The cnd_timedwait is a wrapper on POSIX threads to provide C11 standard
threads interface. It directly calls __pthread_cond_timedwait64().

Build tests:
./src/scripts/build-many-glibcs.py glibcs

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/cnd_timedwait.c44
-rw-r--r--sysdeps/unix/sysv/linux/thrd_priv.h27
2 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/cnd_timedwait.c b/sysdeps/unix/sysv/linux/cnd_timedwait.c
new file mode 100644
index 0000000000..90c54aaacb
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/cnd_timedwait.c
@@ -0,0 +1,44 @@
+/* C11 threads conditional timed wait implementation - Linux variant.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <time.h>
+#include "thrd_priv.h"
+
+int
+__cnd_timedwait64 (cnd_t *restrict cond, mtx_t *restrict mutex,
+                   const struct __timespec64 *restrict time_point)
+{
+  int err_code = __pthread_cond_timedwait64 ((pthread_cond_t *) cond,
+                                             (pthread_mutex_t *) mutex,
+                                             time_point);
+  return thrd_err_map (err_code);
+}
+
+#if __TIMESIZE != 64
+libpthread_hidden_def (__cnd_timedwait64)
+
+int
+__cnd_timedwait (cnd_t *restrict cond, mtx_t *restrict mutex,
+                 const struct timespec *restrict time_point)
+{
+  struct __timespec64 ts64 = valid_timespec_to_timespec64 (*time_point);
+
+  return __cnd_timedwait64(cond, mutex, &ts64);
+}
+#endif
+weak_alias (__cnd_timedwait, cnd_timedwait)
diff --git a/sysdeps/unix/sysv/linux/thrd_priv.h b/sysdeps/unix/sysv/linux/thrd_priv.h
new file mode 100644
index 0000000000..fb12ac1615
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/thrd_priv.h
@@ -0,0 +1,27 @@
+/* Internal C11 threads definitions - linux version
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sysdeps/pthread/thrd_priv.h>
+
+#if __TIMESIZE == 64
+# define __cnd_timedwait64 __cnd_timedwait
+#else
+extern int __cnd_timedwait64 (cnd_t *restrict cond, mtx_t *restrict mutex,
+                              const struct __timespec64 *restrict time_point);
+libpthread_hidden_proto (__cnd_timedwait64)
+#endif