zfs-localpv/vendor/gonum.org/v1/gonum/mat/offset_appengine.go
prateekpandey14 fa76b346a0 feat(modules): migrate to go modules and bump go version 1.14.4
- migrate to go module
- bump go version 1.14.4

Signed-off-by: prateekpandey14 <prateek.pandey@mayadata.io>
2020-06-09 22:27:01 +05:30

24 lines
728 B
Go

// Copyright ©2015 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build appengine safe
package mat
import "reflect"
var sizeOfFloat64 = int(reflect.TypeOf(float64(0)).Size())
// offset returns the number of float64 values b[0] is after a[0].
func offset(a, b []float64) int {
va0 := reflect.ValueOf(a).Index(0)
vb0 := reflect.ValueOf(b).Index(0)
if va0.Addr() == vb0.Addr() {
return 0
}
// This expression must be atomic with respect to GC moves.
// At this stage this is true, because the GC does not
// move. See https://golang.org/issue/12445.
return int(vb0.UnsafeAddr()-va0.UnsafeAddr()) / sizeOfFloat64
}