[v3,2/8] time: Add a timeval with a 32-bit tv_sec and tv_usec
Commit Message
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.
---
include/time.h | 45 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
Comments
On Fri, 14 Feb 2020 08:31:28 -0800
Alistair Francis <alistair.francis@wdc.com> wrote:
> 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>
> ---
> include/time.h | 45 +++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 45 insertions(+)
>
> diff --git a/include/time.h b/include/time.h
> index 73f66277ac..ddc0ded640 100644
> --- a/include/time.h
> +++ b/include/time.h
> @@ -400,6 +400,51 @@ 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
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
@@ -400,6 +400,51 @@ 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