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Diffstat (limited to 'pkg/sleep/sleep_unsafe.go')
| -rw-r--r-- | pkg/sleep/sleep_unsafe.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/sleep/sleep_unsafe.go b/pkg/sleep/sleep_unsafe.go index f68c12620..118805492 100644 --- a/pkg/sleep/sleep_unsafe.go +++ b/pkg/sleep/sleep_unsafe.go @@ -75,6 +75,8 @@ package sleep import ( "sync/atomic" "unsafe" + + "gvisor.dev/gvisor/pkg/sync" ) const ( @@ -323,7 +325,12 @@ func (s *Sleeper) enqueueAssertedWaker(w *Waker) { // // This struct is thread-safe, that is, its methods can be called concurrently // by multiple goroutines. +// +// Note, it is not safe to copy a Waker as its fields are modified by value +// (the pointer fields are individually modified with atomic operations). type Waker struct { + _ sync.NoCopy + // s is the sleeper that this waker can wake up. Only one sleeper at a // time is allowed. This field can have three classes of values: // nil -- the waker is not asserted: it either is not associated with |