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Name

qutil_double_sum, qutil_uint_sum, qutil_int_sum - add up an array in parallel

Synopsis

#include <qthread.h>
#include <qthread/qutil.h>

double
qutil_double_sum (double *array, size_t length, int checkfeb);

unsigned int
qutil_uint_sum (unsigned int *array, size_t length, int checkfeb);

int
qutil_int_sum (int *array, size_t length, int checkfeb);

Description

These functions take as input an array of length numbers and will return the sum of those numbers. This sum is computed in parallel by using a lagging-loop structure, using futures to restrict the parallelism to the available limits.

If checkfeb is non-zero, these functions will wait for the entries in the array to be full before adding them. They DO NOT check whether the array entries are properly aligned. If the datatype is too small to do a FEB operation on, they will abort, if sanity checks are turned on.

Return Value

The sum of the first length entries of array.

See Also

qutil_double_mult(3) , qutil_double_max(3) , qutil_double_min(3) , qutil_uint_mult(3) , qutil_uint_max(3) , qutil_uint_min(3) , qutil_int_mult(3) , qutil_int_max(3) , qutil_int_min(3) , qutil_mergesort(3) , qutil_qsort(3)


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