pipeclose
pipeclose(pipe, rpb, wpb);
static void pipeclose (struct pipe *pipe,
pipeclose(pipe, &pipe->bufferA, &pipe->bufferB);
pipeclose(pipe, &pipe->bufferB, &pipe->bufferA);
pipeclose(pipe, &pipe->bufferA, &pipe->bufferB);
pipeclose(pipe, &pipe->bufferB, &pipe->bufferA);
pipeclose(pipe, &pipe->bufferB, &pipe->bufferA);