Struct Lock

pkg/sentry/fsimpl/lock/lock.go:112–122

Lock is a regional file lock. It consists of either a single writer or a set of readers. A Lock may be upgraded from a read lock to a write lock only if there is a single reader and that reader has the same uid as the write lock. A Lock may be downgraded from a write lock to a read lock only if t

//
// +stateify savable
type Lock struct {
	// Readers are the set of read lock holders identified by UniqueID.
	// If len(Readers) > 0 then Writer must be nil.
	Readers map[UniqueID]OwnerInfo

	// Writer holds the writer unique ID. It's nil if there are no writers.
	Writer UniqueID

	// WriterInfo describes the writer. It is only meaningful if Writer != nil.
	WriterInfo OwnerInfo
}

// Locks is a thread-safe wrapper around a LockSet.
//