time: Add a timeval with a 32-bit tv_sec and tv_usec

On y2038 safe 32-bit systems the Linux kernel expects itimerval to
use a 32-bit time_t, even though the other time_t's are 64-bit. To
address this let's add a __timeval32 struct to be used internally.

Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Alistair Francis 2019-12-27 09:07:40 -08:00
parent 4da2597af5
commit d1876749a8

View File

@ -432,6 +432,51 @@ timespec64_to_timeval64 (const struct __timespec64 ts64)
return tv64;
}
/* A version of 'struct timeval' with 32-bit time_t
and suseconds_t. */
struct __timeval32
{
__int32_t tv_sec; /* Seconds. */
__int32_t tv_usec; /* Microseconds. */
};
/* Conversion functions for converting to/from __timeval32 */
static inline struct __timeval64
valid_timeval32_to_timeval64 (const struct __timeval32 tv)
{
return (struct __timeval64) { tv.tv_sec, tv.tv_usec };
}
static inline struct __timeval32
valid_timeval64_to_timeval32 (const struct __timeval64 tv64)
{
return (struct __timeval32) { tv64.tv_sec, tv64.tv_usec };
}
static inline struct timeval
valid_timeval32_to_timeval (const struct __timeval32 tv)
{
return (struct timeval) { tv.tv_sec, tv.tv_usec };
}
static inline struct __timeval32
valid_timeval_to_timeval32 (const struct timeval tv)
{
return (struct __timeval32) { tv.tv_sec, tv.tv_usec };
}
static inline struct timespec
valid_timeval32_to_timespec (const struct __timeval32 tv)
{
return (struct timespec) { tv.tv_sec, tv.tv_usec * 1000 };
}
static inline struct __timeval32
valid_timespec_to_timeval32 (const struct timespec ts)
{
return (struct __timeval32) { (time_t) ts.tv_sec, ts.tv_nsec / 1000 };
}
/* Check if a value is in the valid nanoseconds range. Return true if
it is, false otherwise. */
static inline bool