y2038: Convert gai_suspend to support 64 bit time

This change uses (in gai_misc.h):
- __futex_abstimed_wait64 (instead of futex_reltimed_wait)
- __futex_abstimed_wait_cancellable64
    	(instead of futex_reltimed_wait_cancellable)
        from ./sysdeps/nptl/futex-helpers.h

The gai_suspend() accepts relative timeout, which then is converted to
absolute one.

The i686-gnu port (HURD) do not define DONT_NEED_GAI_MISC_COND and as it
doesn't (yet) support 64 bit time it uses not converted
pthread_cond_timedwait().

The __gai_suspend() is supposed to be run on ports with __TIMESIZE !=64 and
__WORDSIZE==32. It internally utilizes __gai_suspend_time64() and hence the
conversion from 32 bit struct timespec to 64 bit one is required.

For ports supporting 64 bit time the __gai_suspend_time64() will be used
either via alias (to __gai_suspend when __TIMESIZE==64) or redirection
(when -D_TIME_BITS=64 is passed).

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

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/netdb.h b/include/netdb.h
index 49d63c1338..645b85dc62 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -194,6 +194,13 @@ extern int ruserpass (const char *host, const char **aname,
 		      const char **apass);
 libc_hidden_proto (ruserpass)
 
+# if __TIMESIZE == 64
+#  define __gai_suspend_time64 __gai_suspend
+# else
+extern int __gai_suspend_time64 (const struct gaicb *const list[], int ent,
+                                 const struct __timespec64 *timeout);
+libanl_hidden_proto (__gai_suspend_time64)
+# endif
 
 /* The following definition has been removed from the public header
    since we don't want people to use them.  */