Make file rcu_freed

e5c232e4 · Silas Boyd-Wickizer · f9f7aaef · e5c232e4 · e5c232e4
--- a/include/file.hh
+++ b/include/file.hh
@@ -8,7 +8,7 @@
 u64 namehash(const strbuf<DIRSIZ>&);
-struct file : public referenced {
+struct file : public referenced, public rcu_freed {
  static file* alloc();
  file*        dup();
  int          stat(struct stat*);
@@ -26,6 +26,8 @@ struct file : public referenced {
  struct inode *ip;
  u32 off;
+  virtual void do_gc(void);
 private:
  file();
  file& operator=(const file&);

--- a/kernel/file.cc
+++ b/kernel/file.cc
@@ -16,7 +16,8 @@ file::alloc(void)
 }
 file::file(void)
-  : type(file::FD_NONE), readable(0), writable(0), 
+  : rcu_freed("file"), 
+    type(file::FD_NONE), readable(0), writable(0), 
    socket(0), pipe(nullptr), ip(nullptr), off(0)
 {
 }
@@ -32,6 +33,12 @@ file::onzero(void) const
    netclose(socket);
  else if(type != file::FD_NONE)
    panic("file::close bad type");
+  gc_delayed((file*)this);
+}
+void
+file::do_gc(void)
+{
  delete this;
 }