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wgengine/magicsock: use math/rands/v2

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Updates #11058

Co-authored-by: James Tucker <james@tailscale.com>
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali
2024-06-05 15:41:22 -07:00
committed by Maisem Ali
parent 573c8bd8c7
commit 36e8e8cd64
3 changed files with 11 additions and 8 deletions
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8
util/rands/cheap.go
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@@ -23,6 +23,14 @@ func Shuffle[T any](seed uint64, data []T) {
}
}
// IntN is like rand.IntN, but it is seeded on the stack and does not allocate
// or lock any RNG state.
func IntN(seed uint64, n int) int {
var pcg randv2.PCG
pcg.Seed(seed, seed)
return int(uint64n(&pcg, uint64(n)))
}
// Perm is like rand.Perm, but it is seeded on the stack and does not allocate
// or lock any RNG state.
func Perm(seed uint64, n int) []int {