Struct refMap

cgo/sync.go:14–17

refMap is a convenient way to store opaque references that can be passed to C. It is useful if an API uses function pointers and you cannot pass a Go pointer but only a C pointer.

// C. It is useful if an API uses function pointers and you cannot pass a Go
// pointer but only a C pointer.
type refMap struct {
	refs map[unsafe.Pointer]interface{}
	lock sync.Mutex
}

// Put stores a value in the map. It can later be retrieved using Get. It must
// be removed using Remove to avoid memory leaks.