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1 | #ifndef _SYS_PARAM_H |
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2 | #define _SYS_PARAM_H |
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3 | |
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4 | #include <limits.h> |
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5 | |
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6 | #define MAXPATHLEN PATH_MAX |
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7 | #define MAXHOSTNAMELEN 64 |
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8 | #define NGROUPS 32 |
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9 | #define NOGROUP (-1) |
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10 | #define NOFILE OPEN_MAX |
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11 | |
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12 | #undef MIN |
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13 | #undef MAX |
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14 | #define MIN(a,b) (((a)<(b))?(a):(b)) |
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15 | #define MAX(a,b) (((a)>(b))?(a):(b)) |
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16 | |
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17 | #ifdef __alpha__ |
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18 | #define HZ 1024 |
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19 | #else |
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20 | #define HZ 100 |
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21 | #endif |
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22 | |
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23 | #ifndef howmany |
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24 | # define howmany(x, y) (((x)+((y)-1))/(y)) |
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25 | #endif |
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26 | #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) |
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27 | #define powerof2(x) ((((x)-1)&(x))==0) |
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28 | |
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29 | #endif |
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