68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package reedsolomon
|
|
|
|
import (
|
|
"runtime"
|
|
|
|
"github.com/klauspost/cpuid"
|
|
)
|
|
|
|
// Option allows to override processing parameters.
|
|
type Option func(*options)
|
|
|
|
type options struct {
|
|
maxGoroutines int
|
|
minSplitSize int
|
|
useAVX2, useSSSE3 bool
|
|
}
|
|
|
|
var defaultOptions = options{
|
|
maxGoroutines: 50,
|
|
minSplitSize: 512,
|
|
}
|
|
|
|
func init() {
|
|
if runtime.GOMAXPROCS(0) <= 1 {
|
|
defaultOptions.maxGoroutines = 1
|
|
}
|
|
// Detect CPU capabilities.
|
|
defaultOptions.useSSSE3 = cpuid.CPU.SSSE3()
|
|
defaultOptions.useAVX2 = cpuid.CPU.AVX2()
|
|
}
|
|
|
|
// WithMaxGoroutines is the maximum number of goroutines number for encoding & decoding.
|
|
// Jobs will be split into this many parts, unless each goroutine would have to process
|
|
// less than minSplitSize bytes (set with WithMinSplitSize).
|
|
// For the best speed, keep this well above the GOMAXPROCS number for more fine grained
|
|
// scheduling.
|
|
// If n <= 0, it is ignored.
|
|
func WithMaxGoroutines(n int) Option {
|
|
return func(o *options) {
|
|
if n > 0 {
|
|
o.maxGoroutines = n
|
|
}
|
|
}
|
|
}
|
|
|
|
// MinSplitSize Is the minimum encoding size in bytes per goroutine.
|
|
// See WithMaxGoroutines on how jobs are split.
|
|
// If n <= 0, it is ignored.
|
|
func WithMinSplitSize(n int) Option {
|
|
return func(o *options) {
|
|
if n > 0 {
|
|
o.maxGoroutines = n
|
|
}
|
|
}
|
|
}
|
|
|
|
func withSSE3(enabled bool) Option {
|
|
return func(o *options) {
|
|
o.useSSSE3 = enabled
|
|
}
|
|
}
|
|
|
|
func withAVX2(enabled bool) Option {
|
|
return func(o *options) {
|
|
o.useAVX2 = enabled
|
|
}
|
|
}
|