// It reports whether both windows have available capacity.
func http2takeInflows(f1, f2 *http2inflow, n uint32) bool {
	if n > uint32(f1.avail) || n > uint32(f2.avail) {
		return false
	}
	f1.avail -= int32(n)
	f2.avail -= int32(n)
	return true
}

// outflow is the outbound flow control window's size.
type http2outflow struct {
	_ http2incomparable

pkg syscall (darwin-arm64), type Stat_t struct, Size int64
pkg syscall (darwin-arm64), type Stat_t struct, Uid uint32
pkg syscall (darwin-arm64), type Statfs_t struct
pkg syscall (darwin-arm64), type Statfs_t struct, Bavail uint64
pkg syscall (darwin-arm64), type Statfs_t struct, Bfree uint64
pkg syscall (darwin-arm64), type Statfs_t struct, Blocks uint64
pkg syscall (darwin-arm64), type Statfs_t struct, Bsize uint32