57 lines
1.0 KiB
Go
57 lines
1.0 KiB
Go
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package parallel
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import (
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"sync"
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"git.tuxpa.in/a/lambda"
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)
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var routineCount int = 1
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func SetRoutineCount(n int) {
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routineCount = n
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}
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func Map[T any](xs []T, fx func(T) T) []T {
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spl := lambda.Split(xs, routineCount)
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wg := new(sync.WaitGroup)
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wg.Add(len(spl))
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for i, v := range spl {
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go func(ix int, vx []T) {
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spl[ix] = lambda.Map(vx, fx)
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wg.Done()
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}(i, v)
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}
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wg.Wait()
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return lambda.Flatten(spl)
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}
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func Foldl[T any](xs []T, fx func(T, T) T) T {
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spl := lambda.Split(xs, routineCount)
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wg := new(sync.WaitGroup)
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wg.Add(len(spl))
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tmp := make([]T, len(spl))
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for i, v := range spl {
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go func(ix int, vx []T) {
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tmp[ix] = lambda.Foldl(vx, fx)
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wg.Done()
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}(i, v)
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}
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wg.Wait()
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return lambda.Foldl(tmp, fx)
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}
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func Foldr[T any](xs []T, fx func(T, T) T) T {
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spl := lambda.Split(xs, routineCount)
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wg := new(sync.WaitGroup)
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wg.Add(len(spl))
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tmp := make([]T, len(spl))
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for i, v := range spl {
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go func(ix int, vx []T) {
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tmp[ix] = lambda.Foldr(vx, fx)
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wg.Done()
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}(i, v)
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}
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wg.Wait()
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return lambda.Foldr(tmp, fx)
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}
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