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qt_double_sum, qt_uint_sum, qt_int_sum - add up an array in parallel


#include <qthread/qloop.h>

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

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

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


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 dividing the iterations evenly among the shepherds, 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.

Return Value

The sum of the first length entries of array.

See Also

qt_double_prod(3) , qt_double_max(3) , qt_double_min(3) , qt_uint_prod(3) , qt_uint_max(3) , qt_uint_min(3) , qt_int_prod(3) , qt_int_max(3) , qt_int_min(3) , qt_loop(3) , qt_loop_future(3) , qt_loop_balance(3) , qt_loop_balance_future(3) , qt_loopaccum_balance(3) , qt_loopaccum_balance_future(3)

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