check p->killed for long-lived sleeps

1 files changed, 2 insertions, 2 deletions

diff --git a/pipe.c b/pipe.c
index 7ef89e2..923e609 100644
--- a/pipe.c
+++ b/pipe.c
@@ -86,7 +86,7 @@ pipe_write(struct pipe *p, char *addr, int n)
 
   for(i = 0; i < n; i++){
     while(((p->writep + 1) % PIPESIZE) == p->readp){
-      if(p->readopen == 0){
+      if(p->readopen == 0 || curproc[cpu()]->killed){
         release(&p->lock);
         return -1;
       }
@@ -110,7 +110,7 @@ pipe_read(struct pipe *p, char *addr, int n)
   acquire(&p->lock);
 
   while(p->readp == p->writep){
-    if(p->writeopen == 0){
+    if(p->writeopen == 0 || curproc[cpu()]->killed){
       release(&p->lock);
       return 0;
     }