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| author | Lukasz Majewski <lukma@denx.de> | 2020-04-23 00:20:51 +0200 |
|---|---|---|
| committer | Lukasz Majewski <lukma@denx.de> | 2020-05-20 01:03:27 +0200 |
| commit | 10ae49d2ce4576d8bb8f01d1fc1cbdf550ad4cbd (patch) | |
| tree | 6b0fe2ed5198fe40f00e62bad2f3acd8e95d5e3f /sysdeps/unix | |
| parent | df4289508a3a0e345a87544ee4eea8cbb4c9d197 (diff) | |
| download | glibc-10ae49d2ce4576d8bb8f01d1fc1cbdf550ad4cbd.tar.gz glibc-10ae49d2ce4576d8bb8f01d1fc1cbdf550ad4cbd.tar.xz glibc-10ae49d2ce4576d8bb8f01d1fc1cbdf550ad4cbd.zip | |
y2038: Provide conversion helpers for struct __ntptimeval64
Those functions allow easy conversion between Y2038 safe, glibc internal
struct __ntptimeval64 and struct ntptimeval.
The reserved fields (i.e. __glibc_reserved{1234}) during conversion are
zeroed as well, to provide behavior similar to one in ntp_gettimex function
(where those are cleared before the struct ntptimeval is returned).
Those functions are put in Linux specific sys/timex.h file, as putting
them into glibc's local include/time.h would cause build break on HURD as
it doesn't support struct timex related syscalls.
Build tests:
./src/scripts/build-many-glibcs.py glibcs
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/include/sys/timex.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/include/sys/timex.h b/sysdeps/unix/sysv/linux/include/sys/timex.h index 8c536b9a95..e762e03230 100644 --- a/sysdeps/unix/sysv/linux/include/sys/timex.h +++ b/sysdeps/unix/sysv/linux/include/sys/timex.h @@ -152,5 +152,41 @@ valid_timex64_to_timex (const struct __timex64 tx64) return tx; } + +/* Convert a known valid struct ntptimeval into a struct __ntptimeval64. */ +static inline struct __ntptimeval64 +valid_ntptimeval_to_ntptimeval64 (const struct ntptimeval ntv) +{ + struct __ntptimeval64 ntv64; + + ntv64.time = valid_timeval_to_timeval64 (ntv.time); + ntv64.maxerror = ntv.maxerror; + ntv64.esterror = ntv.esterror; + ntv64.tai = ntv.tai; + ntv64.__glibc_reserved1 = 0; + ntv64.__glibc_reserved2 = 0; + ntv64.__glibc_reserved3 = 0; + ntv64.__glibc_reserved4 = 0; + + return ntv64; +} + +/* Convert a known valid struct __ntptimeval64 into a struct ntptimeval. */ +static inline struct ntptimeval +valid_ntptimeval64_to_ntptimeval (const struct __ntptimeval64 ntp64) +{ + struct ntptimeval ntp; + + ntp.time = valid_timeval64_to_timeval (ntp64.time); + ntp.maxerror = ntp64.maxerror; + ntp.esterror = ntp64.esterror; + ntp.tai = ntp64.tai; + ntp.__glibc_reserved1 = 0; + ntp.__glibc_reserved2 = 0; + ntp.__glibc_reserved3 = 0; + ntp.__glibc_reserved4 = 0; + + return ntp; +} # endif /* _ISOMAC */ #endif /* sys/timex.h */ |