Add file reference counting sanity check

12 years ago · 2934c5a65f
1 changed files with 2 additions and 1 deletions
--- a/pk/file.c
+++ b/pk/file.c
@ -15,7 +15,8 @@ file_t *stdout, *stdin, *stderr;
 void file_incref(file_t* f)
 {
-  atomic_add(&f->refcnt, 1);
+  long prev = atomic_add(&f->refcnt, 1);
  kassert(prev > 0);
 }
 void file_decref(file_t* f)