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make SpinLock.Backoff pub

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kprotty 2019-11-05 13:43:17 -06:00
parent 84e370d0b2
commit 14209cf615
1 changed files with 6 additions and 5 deletions
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11
lib/std/spinlock.zig
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@ -44,16 +44,17 @@ pub const SpinLock = struct {
}
}
const Backoff = struct {
/// Provides a method to incrementally yield longer each time its called.
pub const Backoff = struct {
iteration: usize,
fn init() @This() {
pub fn init() @This() {
return @This(){ .iteration = 0 };
}
// Hybrid yielding from
// http://www.1024cores.net/home/lock-free-algorithms/tricks/spinning
fn yield(self: *@This()) void {
/// Hybrid yielding from
/// http://www.1024cores.net/home/lock-free-algorithms/tricks/spinning
pub fn yield(self: *@This()) void {
defer self.iteration +%= 1;
if (self.iteration < 10) {
yieldCpu();