Finish move of clock_* functions to libc. [BZ #24959]

[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / clock_nanosleep.c

diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
index 69c47ca90adb1d2c7b1cf143dcffeec1a25c63c3..e19e09d197d6f0156139bde23945c444cf627b7a 100644 (file)
--- a/sysdeps/unix/sysv/linux/clock_nanosleep.c
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2019 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
@@ -21,6 +21,7 @@
 #include <sysdep-cancel.h>
 #include "kernel-posix-cpu-timers.h"
 
+#include <shlib-compat.h>
 
 /* We can simply use the syscall.  The CPU clocks are not supported
    with this function.  */
@@ -28,27 +29,24 @@ int
 __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
                   struct timespec *rem)
 {
-  INTERNAL_SYSCALL_DECL (err);
-  int r;
-
   if (clock_id == CLOCK_THREAD_CPUTIME_ID)
     return EINVAL;
   if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
     clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
 
-  if (SINGLE_THREAD_P)
-    r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
-  else
-    {
-      int oldstate = LIBC_CANCEL_ASYNC ();
-
-      r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req,
-                           rem);
-
-      LIBC_CANCEL_RESET (oldstate);
-    }
-
+  /* If the call is interrupted by a signal handler or encounters an error,
+     it returns a positive value similar to errno.  */
+  INTERNAL_SYSCALL_DECL (err);
+  int r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep, err, clock_id, flags,
+                                  req, rem);
   return (INTERNAL_SYSCALL_ERROR_P (r, err)
          ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
 }
-weak_alias (__clock_nanosleep, clock_nanosleep)
+
+versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17);
+/* clock_nanosleep moved to libc in version 2.17;
+   old binaries may expect the symbol version it had in librt.  */
+#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
+strong_alias (__clock_nanosleep, __clock_nanosleep_2);
+compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2);
+#endif