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25 lines
456 B
C++
25 lines
456 B
C++
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#include <time.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <DB/Common/Exception.h>
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#include <DB/Common/randomSeed.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CANNOT_CLOCK_GETTIME;
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}
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}
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uint64_t randomSeed()
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{
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struct timespec times;
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if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, ×))
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DB::throwFromErrno("Cannot clock_gettime.", DB::ErrorCodes::CANNOT_CLOCK_GETTIME);
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return times.tv_nsec + times.tv_sec + getpid();
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}
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