diff options
Diffstat (limited to 'include/mach/time_value.h')
| -rw-r--r-- | include/mach/time_value.h | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/include/mach/time_value.h b/include/mach/time_value.h index f9b977c8..9ecdd28e 100644 --- a/include/mach/time_value.h +++ b/include/mach/time_value.h @@ -41,7 +41,8 @@ struct rpc_time_value { typedef struct rpc_time_value rpc_time_value_t; /* - * Time value used by kernel. + * Time value used by kernel interfaces. Ideally they should be migrated + * to use time_value64 below. */ struct time_value { long_integer_t seconds; @@ -49,6 +50,16 @@ struct time_value { }; typedef struct time_value time_value_t; +/* + * Time value used internally by the kernel that uses 64 bits to track seconds + * and nanoseconds. Note that the current resolution is only microseconds. + */ +struct time_value64 { + int64_t seconds; + int64_t nanoseconds; +}; +typedef struct time_value64 time_value64_t; + /** * Functions used by Mig to perform user to kernel conversion and vice-versa. * We only do this because we may run a 64 bit kernel with a 32 bit user space. @@ -69,10 +80,14 @@ static __inline__ time_value_t convert_time_value_from_user(rpc_time_value_t tv) * are normalized (microseconds <= 999999). */ #define TIME_MICROS_MAX (1000000) +#define TIME_NANOS_MAX (1000000000) #define time_value_assert(val) \ assert(0 <= (val)->microseconds && (val)->microseconds < TIME_MICROS_MAX); +#define time_value64_assert(val) \ + assert(0 <= (val)->nanoseconds && (val)->nanoseconds < TIME_NANOS_MAX); + #define time_value_add_usec(val, micros) { \ time_value_assert(val); \ if (((val)->microseconds += (micros)) \ @@ -83,6 +98,16 @@ static __inline__ time_value_t convert_time_value_from_user(rpc_time_value_t tv) time_value_assert(val); \ } +#define time_value64_add_usec(val, micros) { \ + time_value64_assert(val); \ + if (((val)->nanoseconds += (micros) * 1000) \ + >= TIME_NANOS_MAX) { \ + (val)->nanoseconds -= TIME_NANOS_MAX; \ + (val)->seconds++; \ + } \ + time_value64_assert(val); \ +} + #define time_value_sub_usec(val, micros) { \ time_value_assert(val); \ if (((val)->microseconds -= (micros)) < 0) { \ |