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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_TIMES_H |
| 2 | #define _LINUX_TIMES_H |
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| 3 | |||
| 4 | #ifdef __KERNEL__ |
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| 5 | #include <asm/div64.h> |
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| 6 | #include <asm/types.h> |
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| 7 | #include <asm/param.h> |
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| 8 | |||
| 9 | #if (HZ % USER_HZ)==0 |
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| 10 | # define jiffies_to_clock_t(x) ((x) / (HZ / USER_HZ)) |
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| 11 | #else |
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| 12 | # define jiffies_to_clock_t(x) ((clock_t) jiffies_64_to_clock_t((u64) x)) |
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| 13 | #endif |
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| 14 | |||
| 15 | static inline unsigned long clock_t_to_jiffies(unsigned long x) |
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| 16 | { |
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| 17 | #if (HZ % USER_HZ)==0 |
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| 18 | if (x >= ~0UL / (HZ / USER_HZ)) |
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| 19 | return ~0UL; |
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| 20 | return x * (HZ / USER_HZ); |
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| 21 | #else |
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| 22 | u64 jif; |
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| 23 | |||
| 24 | /* Don't worry about loss of precision here .. */ |
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| 25 | if (x >= ~0UL / HZ * USER_HZ) |
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| 26 | return ~0UL; |
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| 27 | |||
| 28 | /* .. but do try to contain it here */ |
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| 29 | jif = x * (u64) HZ; |
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| 30 | do_div(jif, USER_HZ); |
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| 31 | return jif; |
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| 32 | #endif |
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| 33 | } |
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| 34 | |||
| 35 | static inline u64 jiffies_64_to_clock_t(u64 x) |
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| 36 | { |
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| 37 | #if (HZ % USER_HZ)==0 |
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| 38 | do_div(x, HZ / USER_HZ); |
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| 39 | #else |
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| 40 | /* |
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| 41 | * There are better ways that don't overflow early, |
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| 42 | * but even this doesn't overflow in hundreds of years |
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| 43 | * in 64 bits, so.. |
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| 44 | */ |
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| 45 | x *= USER_HZ; |
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| 46 | do_div(x, HZ); |
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| 47 | #endif |
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| 48 | return x; |
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| 49 | } |
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| 50 | #endif |
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| 51 | |||
| 52 | struct tms { |
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| 53 | clock_t tms_utime; |
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| 54 | clock_t tms_stime; |
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| 55 | clock_t tms_cutime; |
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| 56 | clock_t tms_cstime; |
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| 57 | }; |
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| 58 | |||
| 59 | #endif |