dynahash.h File Reference

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Functions
int	my_log2 (long num)

Function Documentation

my_log2()

int my_log2

(

long

num

)

Definition at line 1760 of file dynahash.c.

{
    /*
     * guard against too-large input, which would be invalid for
     * pg_ceil_log2_*()
     */
    if (num > LONG_MAX / 2)
        num = LONG_MAX / 2;
 
#if SIZEOF_LONG < 8
    return pg_ceil_log2_32(num);
#else
    return pg_ceil_log2_64(num);
#endif
}

References pg_ceil_log2_32(), and pg_ceil_log2_64().

Referenced by ExecHashTableCreate(), ExecParallelHashTableSetCurrentBatch(), hash_choose_num_partitions(), hash_create(), MultiExecParallelHash(), next_pow2_int(), next_pow2_long(), and subxact_info_read().