pi                 25 kernel/pipe.c    struct pipe *pi;
pi                 27 kernel/pipe.c    pi = 0;
pi                 31 kernel/pipe.c    if((pi = (struct pipe*)kalloc()) == 0)
pi                 33 kernel/pipe.c    pi->readopen = 1;
pi                 34 kernel/pipe.c    pi->writeopen = 1;
pi                 35 kernel/pipe.c    pi->nwrite = 0;
pi                 36 kernel/pipe.c    pi->nread = 0;
pi                 37 kernel/pipe.c    initlock(&pi->lock, "pipe");
pi                 41 kernel/pipe.c    (*f0)->pipe = pi;
pi                 45 kernel/pipe.c    (*f1)->pipe = pi;
pi                 49 kernel/pipe.c    if(pi)
pi                 50 kernel/pipe.c      kfree((char*)pi);
pi                 59 kernel/pipe.c  pipeclose(struct pipe *pi, int writable)
pi                 61 kernel/pipe.c    acquire(&pi->lock);
pi                 63 kernel/pipe.c      pi->writeopen = 0;
pi                 64 kernel/pipe.c      wakeup(&pi->nread);
pi                 66 kernel/pipe.c      pi->readopen = 0;
pi                 67 kernel/pipe.c      wakeup(&pi->nwrite);
pi                 69 kernel/pipe.c    if(pi->readopen == 0 && pi->writeopen == 0){
pi                 70 kernel/pipe.c      release(&pi->lock);
pi                 71 kernel/pipe.c      kfree((char*)pi);
pi                 73 kernel/pipe.c      release(&pi->lock);
pi                 77 kernel/pipe.c  pipewrite(struct pipe *pi, uint64 addr, int n)
pi                 82 kernel/pipe.c    acquire(&pi->lock);
pi                 84 kernel/pipe.c      if(pi->readopen == 0 || killed(pr)){
pi                 85 kernel/pipe.c        release(&pi->lock);
pi                 88 kernel/pipe.c      if(pi->nwrite == pi->nread + PIPESIZE){ //DOC: pipewrite-full
pi                 89 kernel/pipe.c        wakeup(&pi->nread);
pi                 90 kernel/pipe.c        sleep(&pi->nwrite, &pi->lock);
pi                 95 kernel/pipe.c        pi->data[pi->nwrite++ % PIPESIZE] = ch;
pi                 99 kernel/pipe.c    wakeup(&pi->nread);
pi                100 kernel/pipe.c    release(&pi->lock);
pi                106 kernel/pipe.c  piperead(struct pipe *pi, uint64 addr, int n)
pi                112 kernel/pipe.c    acquire(&pi->lock);
pi                113 kernel/pipe.c    while(pi->nread == pi->nwrite && pi->writeopen){  //DOC: pipe-empty
pi                115 kernel/pipe.c        release(&pi->lock);
pi                118 kernel/pipe.c      sleep(&pi->nread, &pi->lock); //DOC: piperead-sleep
pi                121 kernel/pipe.c      if(pi->nread == pi->nwrite)
pi                123 kernel/pipe.c      ch = pi->data[pi->nread++ % PIPESIZE];
pi                127 kernel/pipe.c    wakeup(&pi->nwrite);  //DOC: piperead-wakeup
pi                128 kernel/pipe.c    release(&pi->lock);
pi               1156 user/usertests.c   int fd, pid, i, j, n, total, pi;
pi               1161 user/usertests.c   for(pi = 0; pi < NCHILD; pi++){
pi               1162 user/usertests.c     fname = names[pi];
pi               1178 user/usertests.c       memset(buf, '0'+pi, SZ);
pi               1190 user/usertests.c   for(pi = 0; pi < NCHILD; pi++){
pi               1223 user/usertests.c   int pid, i, fd, pi;
pi               1226 user/usertests.c   for(pi = 0; pi < NCHILD; pi++){
pi               1234 user/usertests.c       name[0] = 'p' + pi;
pi               1257 user/usertests.c   for(pi = 0; pi < NCHILD; pi++){
pi               1265 user/usertests.c     for(pi = 0; pi < NCHILD; pi++){
pi               1266 user/usertests.c       name[0] = 'p' + pi;
pi               1282 user/usertests.c     for(pi = 0; pi < NCHILD; pi++){
pi               1283 user/usertests.c       name[0] = 'p' + pi;