Last change
on this file since 617 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.2 KB
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Rev | Line | |
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[444] | 1 | #include <machine/syscall.h> |
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| 2 | #include <sys/types.h> |
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| 3 | #include <sys/times.h> |
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| 4 | #include <sys/time.h> |
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| 5 | #include "internal_syscall.h" |
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| 6 | |
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| 7 | extern int _gettimeofday(struct timeval *, void *); |
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| 8 | |
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| 9 | /* Timing information for current process. From |
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| 10 | newlib/libc/include/sys/times.h the tms struct fields are as follows: |
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| 11 | |
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| 12 | - clock_t tms_utime : user clock ticks |
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| 13 | - clock_t tms_stime : system clock ticks |
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| 14 | - clock_t tms_cutime : children's user clock ticks |
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| 15 | - clock_t tms_cstime : children's system clock ticks |
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| 16 | |
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| 17 | Since maven does not currently support processes we set both of the |
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| 18 | children's times to zero. Eventually we might want to separately |
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| 19 | account for user vs system time, but for now we just return the total |
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| 20 | number of cycles since starting the program. */ |
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| 21 | clock_t |
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| 22 | _times(struct tms *buf) |
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| 23 | { |
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| 24 | // when called for the first time, initialize t0 |
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| 25 | static struct timeval t0; |
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| 26 | if (t0.tv_sec == 0) |
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| 27 | _gettimeofday (&t0, 0); |
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| 28 | |
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| 29 | struct timeval t; |
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| 30 | _gettimeofday (&t, 0); |
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| 31 | |
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| 32 | long long utime = (t.tv_sec - t0.tv_sec) * 1000000 + (t.tv_usec - t0.tv_usec); |
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| 33 | buf->tms_utime = utime * CLOCKS_PER_SEC / 1000000; |
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| 34 | buf->tms_stime = buf->tms_cstime = buf->tms_cutime = 0; |
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| 35 | |
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| 36 | return -1; |
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| 37 | } |
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