108 struct pipe {  struct
116 	struct	pipe *pipe_peer;	/* link with other direction */  argument
139 	struct pipe	pp_rpipe;
140 	struct pipe	pp_wpipe;
145 #define PIPE_MTX(pipe)		(&(pipe)->pipe_pair->pp_mtx)  argument
146 #define PIPE_LOCK(pipe)		mtx_lock(PIPE_MTX(pipe))  argument
147 #define PIPE_UNLOCK(pipe)	mtx_unlock(PIPE_MTX(pipe))  argument
148 #define PIPE_LOCK_ASSERT(pipe, type)  mtx_assert(PIPE_MTX(pipe), (type))  argument
150 void	pipe_dtor(struct pipe *dpipe);
151 int	pipe_named_ctor(struct pipe **ppipe, struct thread *td);
152 void	pipeselwakeup(struct pipe *cpipe);