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cockroach-go1.23.12: runtime: add CurrentP #6

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Sep 26, 2025
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cockroach-go1.23.12: runtime: add CurrentP #6

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12 changes: 12 additions & 0 deletions src/runtime/cockroach.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
package runtime

// CurrentP returns the index of the current P, between 0 and the current
// GOMAXPROCS.
//
// This can only be used as a best-effort facility; there is no guarantee that
// the goroutine still runs on the same P when this function returns.
func CurrentP() int {
// Note: preemption is not possible in-between these loads (there are no
// preemption-safe points).
return int(getg().m.p.ptr().id)
}